classic case study

Psychology’s 10 Greatest Case Studies – Digested

These ten characters have all had a huge influence on psychology and their stories continue to intrigue each new generation of students.

27 November 2015

By Christian Jarrett

These ten characters have all had a huge influence on psychology and their stories continue to intrigue each new generation of students. What's particularly fascinating is that many of their stories continue to evolve – new evidence comes to light, or new technologies are brought to bear, changing how the cases are interpreted and understood. What many of these 10 also have in common is that they speak to some of the perennial debates in psychology, about personality and identity, nature and nurture, and the links between mind and body.

Phineas Gage

One day in 1848 in Central Vermont, Phineas Gage was tamping explosives into the ground to prepare the way for a new railway line when he had a terrible accident. The detonation went off prematurely, and his tamping iron shot into his face, through his brain, and out the top of his head. Remarkably Gage survived, although his friends and family reportedly felt he was changed so profoundly (becoming listless and aggressive) that "he was no longer Gage."

There the story used to rest – a classic example of frontal brain damage affecting personality. However, recent years have seen  a drastic reevaluation  of Gage's story in light of new evidence. It's now believed that he underwent significant rehabilitation and in fact began work as a horse carriage driver in Chile. A  simulation of his injuries  suggested much of his right frontal cortex was likely spared, and  photographic evidence  has been unearthed showing a post-accident dapper Gage. Not that you'll find this revised account in many psychology textbooks:  a recent analysis  showed that few of them have kept up to date with the new evidence.

See also Jim Horne's ' Blasts from the past ', looking back at similar accounts from the era.

Henry Gustav Molaison (known for years as H.M. in the literature to protect his privacy), who died in 2008, developed severe amnesia at age 27 after undergoing brain surgery as a form of treatment for the epilepsy he'd suffered since childhood. He was subsequently the focus of study by over 100 psychologists and neuroscientists and he's been mentioned in over 12,000 journal articles! Molaison's surgery involved the removal of large parts of the hippocampus on both sides of his brain and the result was that he was almost entirely unable to store any new information in long-term memory (there were some exceptions – for example, after 1963 he was aware that a US president had been assassinated in Dallas). The extremity of Molaison's deficits was a surprise to experts of the day because many of them believed that memory was distributed throughout the cerebral cortex.

Today, Molaison's legacy lives on: his brain was carefully sliced and preserved and turned into a 3D digital atlas and his life story is reportedly due to be turned into a feature film based on the book researcher Suzanne Corkin wrote about him:  Permanent Present Tense, The Man With No Memory and What He Taught The World .

See also 'Understanding amnesia - Is it time to forget H.M.?'

Victor Leborgne (nickname "Tan")

The fact that, in most people, language function is served predominantly by the left frontal cortex has today almost become common knowledge, at least among psych students. However, back in the early 19th century, the consensus view was that language function (like memory, see entry for H.M.) was distributed through the brain. An 19th century patient who helped change that was Victor Leborgne, a Frenchman who was nicknamed "Tan" because that was the only sound he could utter (besides the expletive phrase "sacre nom de Dieu").

In 1861, aged 51, Leborgne was referred to the renowned neurologist Paul Broca, but died soon after. Broca examined Leborgne's brain and noticed a lesion in his left frontal lobe – a segment of tissue now known as Broca's area. Given Leborgne's impaired speech but intact comprehension, Broca concluded that this area of the brain was responsible for speech production and he set about persuading his peers of this fact – now recognised as a key moment in psychology's history.

For decades little was known about Leborgne, besides his important contribution to science. However, in a paper published in 2013, Cezary Domanski at Maria Curie-Sklodowska University in Poland uncovered new biographical details, including the possibility that Leborgne muttered the word "Tan" because his birthplace of Moret, home to several tanneries.

See also ' Glimpsed at last ', and ' Using brain imaging to re-evaluate psychology's three most famous cases '.

Wild Boy of Aveyron

The "Wild boy of Aveyron" – named Victor by the physician Jean-Marc Itard – was found emerging from Aveyron forest in South West France in 1800, aged 11 or 12, where's it's thought he had been living in the wild for several years. For psychologists and philosophers, Victor became a kind of "natural experiment" into the question of nature and nurture. How would he be affected by the lack of human input early in his life?

Those who hoped Victor would support the notion of the "noble savage" uncorrupted by modern civilisation were largely disappointed: the boy was dirty and dishevelled, defecated where he stood and apparently motivated largely by hunger. Victor acquired celebrity status after he was transported to Paris and Itard began a mission to teach and socialise the "feral child". This programme met with mixed success: Victor never learned to speak fluently, but he dressed, learned civil toilet habits, could write a few letters and acquired some very basic language comprehension. Autism expert Uta Frith believes Victor may have been abandoned because he was autistic, but she acknowledges we will never know the truth of his background.

Victor's story inspired the 2004 novel  The Wild Boy  and was dramatised in the 1970 French film  The Wild Child .

Listen to an episode of 'The Mind Changers'.

Nicknamed 'Kim-puter' by his friends, Peek who died in 2010 aged 58, was the inspiration for Dustin Hoffman's autistic savant character in the multi-Oscar-winning film  Rain Man . Before that movie, which was released in 1988, few people had heard of autism, so Peek via the film can be credited with helping to raise the profile of the condition.

Arguably though, the film also helped spread the popular misconception that giftedness is a hallmark of autism (in one notable scene, Hoffman's character deduces in an instant the precise number of cocktail sticks – 246 – that a waitress drops on the floor). Peek himself was actually a non-autistic savant, born with brain abnormalities including a malformed cerebellum and an absent corpus callosum (the massive bundle of tissue that usually connects the two hemispheres). His savant skills were astonishing and included calendar calculation, as well as an encyclopaedic knowledge of history, literature, classical music, US zip codes and travel routes. It was estimated that he read more than 12,000 books in his life time, all of them committed to flawless memory. Although outgoing and sociable, Peek had coordination problems and struggled with abstract or conceptual thinking.

"Anna O." is the pseudonym for Bertha Pappenheim, a pioneering German Jewish feminist and social worker who died in 1936 aged 77. As Anna O. she is known as one of the first ever patients to undergo psychoanalysis and her case inspired much of Freud's thinking on mental illness. Pappenheim first came to the attention of another psychoanalyst, Joseph Breuer, in 1880 when he was called to her house in Vienna where she was lying in bed, almost entirely paralysed. Her other symptoms include hallucinations, personality changes and rambling speech, but doctors could find no physical cause.

For 18 months, Breuer visited her almost daily and talked to her about her thoughts and feelings, including her grief for her father, and the more she talked, the more her symptoms seemed to fade – this was apparently one of the first ever instances of psychoanalysis or "the talking cure", although the degree of Breuer's success has been disputed and some historians allege that Pappenheim did have an organic illness, such as epilepsy.

Although Freud never met Pappenheim, he wrote about her case, including the notion that she had a hysterical pregnancy, although this too is disputed. The latter part of Pappenheim's life in Germany post 1888 is as remarkable as her time as Anna O. She became a prolific writer and social pioneer, including authoring stories, plays, and translating seminal texts, and she founded social clubs for Jewish women, worked in orphanages and founded the German Federation of Jewish Women.

Kitty Genovese

Sadly, it is not really Kitty Genovese the person who has become one of psychology's classic case studies, but rather the terrible fate that befell her. In 1964 in New York, Genovese was returning home from her job as a bar maid when she was attacked and eventually murdered by Winston Mosely. What made this tragedy so influential to psychology was that it inspired research into what became known as the Bystander Phenomenon – the now well-established finding that our sense of individual responsibility is diluted by the presence of other people. According to folklore, 38 people watched Genovese's demise yet not one of them did anything to help, apparently a terrible real life instance of the Bystander Effect.

However, the story doesn't end there because historians have since established  the reality was much more complicated  – at least two people did try to summon help, and actually there was only one witness the second and fatal attack. While the main principle of the Bystander Effect has stood the test of time, modern psychology's understanding of the way it works has become a lot more nuanced. For example, there's evidence that in some situations people are more likely to act when they're part of a larger group, such as when they and the other group members all belong to the same social category (such as all being women) as the victim.

See also another angle , on false confessions.

Little Albert

"Little Albert" was the nickname that the pioneering behaviourist psychologist John Watson gave to an 11-month-old baby, in whom, with his colleague and future wife Rosalind Rayner, he deliberately attempted to instill certain fears through a process of conditioning. The research, which was of dubious scientific quality, was conducted in 1920 and has become notorious for being so unethical (such a procedure would never be given approval in modern university settings).

Interest in Little Albert has reignited in recent years as an academic quarrel has erupted over his true identity. A group led by Hall Beck at Appalachian University announced in 2011 that they thought Little Albert was actually Douglas Merritte, the son of a wet nurse at John Hopkins University where Watson and Rayner were based. According to this sad account, Little Albert was neurologically impaired, compounding the unethical nature of the Watson/Rayner research, and he died aged six of  hydrocephalus (fluid on the brain).

However, this account was challenged by a different group of scholars led by Russell Powell at MacEwan University in 2014. They established that Little Albert was more likely William A Barger (recorded in his medical file as Albert Barger), the son of a different wet nurse. Earlier this year, textbook writer Richard Griggs weighed up all the evidence and concluded that the Barger story is the more credible, which would mean that Little Albert in fact died 2007 aged 87.

Chris Sizemore

Chris Costner Sizemore is one of the most famous patients to be given the controversial diagnosis of multiple personality disorder, known today as dissociative identity disorder. Sizemore's alter egos apparently included Eve White, Eve Black, Jane and many others. By some accounts, Sizemore expressed these personalities as a coping mechanism in the face of traumas she experienced in childhood, including seeing her mother badly injured and a man sawn in half at a lumber mill.

In recent years, Sizemore has described how her alter egos have been combined into one united personality for many decades, but she still sees different aspects of her past as belonging to her different personalities. For example, she has stated that her husband was married to Eve White (not her), and that Eve White is the mother of her first daughter. Her story was turned into a movie in 1957 called  The Three Faces of Eve  (based on a book of the same name written by her psychiatrists). Joanne Woodward won the best actress Oscar for portraying Sizemore and her various personalities in this film. Sizemore published her autobiography in 1977 called  I'm Eve . In 2009, she appeared on the BBC's  Hard Talk  interview show.

David Reimer

One of the most famous patients in psychology, Reimer lost his penis in a botched circumcision operation when he was just 8 months old. His parents were subsequently advised by psychologist John Money to raise Reimer as a girl, "Brenda", and for him to undergo further surgery and hormone treatment to assist his gender reassignment. Money initially described the experiment (no one had tried anything like this before) as a huge success that appeared to support his belief in the important role of socialisation, rather than innate factors, in children's gender identity.

In fact, the reassignment was seriously problematic and Reimer's boyishness was never far beneath the surface. When he was aged 14, Reimer was told the truth about his past and set about reversing the gender reassignment process to become male again. He later campaigned against other children with genital injuries being gender reassigned in the way that he had been. His story was turned into the book  As Nature Made Him, The Boy Who Was Raised As A Girl  by John Colapinto, and he is the subject of two BBC Horizon documentaries. Tragically, Reimer took his own life in 2004, aged just 38.

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Classic Case Studies in Psychology

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Have you heard about the man who lived with a hole in his head? Or the boy raised by his parents as a girl? From the woman with multiple personalities, to the man with no brain, this collection of case studies provides a compelling insight into the human mind. This is a fascinating collection of human stories. Some are well-known case studies that have informed clinical practice, others are relatively unknown.

For this edition, Rolls has added recent research findings on each case study plus four brand new cases: the story of Washoe, the ape who could communicate; the much debated case of Holly Ramona and repressed memory; and Kim Peek, the real 'Rainman'.

Classic Case Studies in Psychology is for everyone who has ever wondered about the stranger side of life. No prior knowledge of psychology is required, just an open mind. For those who wish to use this book as part of their studies, or who are just keen to learn more, fun multiple choice questions, fascinating further reading, helpful web links, and self-assessment questions are all available free on our website, www.routledge.com/cw/rolls . Prepare to be amazed ...

TABLE OF CONTENTS

Chapter 1 | 11  pages, the man who couldn’t forget: the story of solomon shereshevsky (s), chapter 2 | 10  pages, the man who lived for the present: the story of h.m. (henry gustav molaison), chapter 3 | 7  pages, the man who was disappointed by what he saw: the story of s.b., chapter 4 | 9  pages, kim peek: the real rain man, chapter 5 | 11  pages, holly ramona and the nature of memory, chapter 6 | 8  pages, the girl who cried murder: the story of catherine ‘kitty’ genovese, chapter 7 | 13  pages, innocence lost: the story of genie, chapter 8 | 13  pages, the boy who was never a girl: the story of david reimer, chapter 9 | 14  pages, the wild boy of aveyron: the story of victor, chapter 10 | 12  pages, two little boys: the story of little albert and little peter, chapter 11 | 9  pages, the boy who needed to play: the story of dibs, chapter 12 | 12  pages, the man who was turned on by prams and handbags, chapter 13 | 9  pages, freud’s analysis of phobia in a young boy: the story of little hans, chapter 14 | 15  pages, the three faces of eve: the story of chris costner sizemore, chapter 15 | 5  pages, the boy who couldn’t stop washing: a story of ocd, chapter 16 | 8  pages, the men who didn’t sleep: the story of peter tripp and randy gardner, chapter 17 | 8  pages, the man who lived with a hole in his head: the story of phineas gage, chapter 18 | 6  pages, the man with no brain, chapter 19 | 12  pages, talking to the animals: washoe and roger fouts.

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15 Famous Experiments and Case Studies in Psychology

Chris Drew (PhD)

Dr. Chris Drew is the founder of the Helpful Professor. He holds a PhD in education and has published over 20 articles in scholarly journals. He is the former editor of the Journal of Learning Development in Higher Education. [Image Descriptor: Photo of Chris]

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Psychology has seen thousands upon thousands of research studies over the years. Most of these studies have helped shape our current understanding of human thoughts, behavior, and feelings.

The psychology case studies in this list are considered classic examples of psychological case studies and experiments, which are still being taught in introductory psychology courses up to this day.

Some studies, however, were downright shocking and controversial that you’d probably wonder why such studies were conducted back in the day. Imagine participating in an experiment for a small reward or extra class credit, only to be left scarred for life. These kinds of studies, however, paved the way for a more ethical approach to studying psychology and implementation of research standards such as the use of debriefing in psychology research .

Case Study vs. Experiment

Before we dive into the list of the most famous studies in psychology, let us first review the difference between case studies and experiments.

• It is an in-depth study and analysis of an individual, group, community, or phenomenon. The results of a case study cannot be applied to the whole population, but they can provide insights for further studies.
• It often uses qualitative research methods such as observations, surveys, and interviews.
• It is often conducted in real-life settings rather than in controlled environments.
• An experiment is a type of study done on a sample or group of random participants, the results of which can be generalized to the whole population.
• It often uses quantitative research methods that rely on numbers and statistics.
• It is conducted in controlled environments, wherein some things or situations are manipulated.

See Also: Experimental vs Observational Studies

Famous Experiments in Psychology

1. the marshmallow experiment.

Psychologist Walter Mischel conducted the marshmallow experiment at Stanford University in the 1960s to early 1970s. It was a simple test that aimed to define the connection between delayed gratification and success in life.

The instructions were fairly straightforward: children ages 4-6 were presented a piece of marshmallow on a table and they were told that they would receive a second piece if they could wait for 15 minutes without eating the first marshmallow.

About one-third of the 600 participants succeeded in delaying gratification to receive the second marshmallow. Mischel and his team followed up on these participants in the 1990s, learning that those who had the willpower to wait for a larger reward experienced more success in life in terms of SAT scores and other metrics.

This case study also supported self-control theory , a theory in criminology that holds that people with greater self-control are less likely to end up in trouble with the law!

The classic marshmallow experiment, however, was debunked in a 2018 replication study done by Tyler Watts and colleagues.

This more recent experiment had a larger group of participants (900) and a better representation of the general population when it comes to race and ethnicity. In this study, the researchers found out that the ability to wait for a second marshmallow does not depend on willpower alone but more so on the economic background and social status of the participants.

2. The Bystander Effect

In 1694, Kitty Genovese was murdered in the neighborhood of Kew Gardens, New York. It was told that there were up to 38 witnesses and onlookers in the vicinity of the crime scene, but nobody did anything to stop the murder or call for help.

Such tragedy was the catalyst that inspired social psychologists Bibb Latane and John Darley to formulate the phenomenon called bystander effect or bystander apathy .

Subsequent investigations showed that this story was exaggerated and inaccurate, as there were actually only about a dozen witnesses, at least two of whom called the police. But the case of Kitty Genovese led to various studies that aim to shed light on the bystander phenomenon.

Latane and Darley tested bystander intervention in an experimental study . Participants were asked to answer a questionnaire inside a room, and they would either be alone or with two other participants (who were actually actors or confederates in the study). Smoke would then come out from under the door. The reaction time of participants was tested — how long would it take them to report the smoke to the authorities or the experimenters?

The results showed that participants who were alone in the room reported the smoke faster than participants who were with two passive others. The study suggests that the more onlookers are present in an emergency situation, the less likely someone would step up to help, a social phenomenon now popularly called the bystander effect.

3. Asch Conformity Study

Have you ever made a decision against your better judgment just to fit in with your friends or family? The Asch Conformity Studies will help you understand this kind of situation better.

In this experiment, a group of participants were shown three numbered lines of different lengths and asked to identify the longest of them all. However, only one true participant was present in every group and the rest were actors, most of whom told the wrong answer.

Results showed that the participants went for the wrong answer, even though they knew which line was the longest one in the first place. When the participants were asked why they identified the wrong one, they said that they didn’t want to be branded as strange or peculiar.

This study goes to show that there are situations in life when people prefer fitting in than being right. It also tells that there is power in numbers — a group’s decision can overwhelm a person and make them doubt their judgment.

4. The Bobo Doll Experiment

The Bobo Doll Experiment was conducted by Dr. Albert Bandura, the proponent of social learning theory .

Back in the 1960s, the Nature vs. Nurture debate was a popular topic among psychologists. Bandura contributed to this discussion by proposing that human behavior is mostly influenced by environmental rather than genetic factors.

In the Bobo Doll Experiment, children were divided into three groups: one group was shown a video in which an adult acted aggressively toward the Bobo Doll, the second group was shown a video in which an adult play with the Bobo Doll, and the third group served as the control group where no video was shown.

The children were then led to a room with different kinds of toys, including the Bobo Doll they’ve seen in the video. Results showed that children tend to imitate the adults in the video. Those who were presented the aggressive model acted aggressively toward the Bobo Doll while those who were presented the passive model showed less aggression.

While the Bobo Doll Experiment can no longer be replicated because of ethical concerns, it has laid out the foundations of social learning theory and helped us understand the degree of influence adult behavior has on children.

5. Blue Eye / Brown Eye Experiment

Following the assassination of Martin Luther King Jr. in 1968, third-grade teacher Jane Elliott conducted an experiment in her class. Although not a formal experiment in controlled settings, A Class Divided is a good example of a social experiment to help children understand the concept of racism and discrimination.

The class was divided into two groups: blue-eyed children and brown-eyed children. For one day, Elliott gave preferential treatment to her blue-eyed students, giving them more attention and pampering them with rewards. The next day, it was the brown-eyed students’ turn to receive extra favors and privileges.

As a result, whichever group of students was given preferential treatment performed exceptionally well in class, had higher quiz scores, and recited more frequently; students who were discriminated against felt humiliated, answered poorly in tests, and became uncertain with their answers in class.

This study is now widely taught in sociocultural psychology classes.

6. Stanford Prison Experiment

One of the most controversial and widely-cited studies in psychology is the Stanford Prison Experiment , conducted by Philip Zimbardo at the basement of the Stanford psychology building in 1971. The hypothesis was that abusive behavior in prisons is influenced by the personality traits of the prisoners and prison guards.

The participants in the experiment were college students who were randomly assigned as either a prisoner or a prison guard. The prison guards were then told to run the simulated prison for two weeks. However, the experiment had to be stopped in just 6 days.

The prison guards abused their authority and harassed the prisoners through verbal and physical means. The prisoners, on the other hand, showed submissive behavior. Zimbardo decided to stop the experiment because the prisoners were showing signs of emotional and physical breakdown.

Although the experiment wasn’t completed, the results strongly showed that people can easily get into a social role when others expect them to, especially when it’s highly stereotyped .

7. The Halo Effect

Have you ever wondered why toothpastes and other dental products are endorsed in advertisements by celebrities more often than dentists? The Halo Effect is one of the reasons!

The Halo Effect shows how one favorable attribute of a person can gain them positive perceptions in other attributes. In the case of product advertisements, attractive celebrities are also perceived as intelligent and knowledgeable of a certain subject matter even though they’re not technically experts.

The Halo Effect originated in a classic study done by Edward Thorndike in the early 1900s. He asked military commanding officers to rate their subordinates based on different qualities, such as physical appearance, leadership, dependability, and intelligence.

The results showed that high ratings of a particular quality influences the ratings of other qualities, producing a halo effect of overall high ratings. The opposite also applied, which means that a negative rating in one quality also correlated to negative ratings in other qualities.

Experiments on the Halo Effect came in various formats as well, supporting Thorndike’s original theory. This phenomenon suggests that our perception of other people’s overall personality is hugely influenced by a quality that we focus on.

8. Cognitive Dissonance

There are experiences in our lives when our beliefs and behaviors do not align with each other and we try to justify them in our minds. This is cognitive dissonance , which was studied in an experiment by Leon Festinger and James Carlsmith back in 1959.

In this experiment, participants had to go through a series of boring and repetitive tasks, such as spending an hour turning pegs in a wooden knob. After completing the tasks, they were then paid either $1 or $20 to tell the next participants that the tasks were extremely fun and enjoyable. Afterwards, participants were asked to rate the experiment. Those who were given $1 rated the experiment as more interesting and fun than those who received $20.

The results showed that those who received a smaller incentive to lie experienced cognitive dissonance — $1 wasn’t enough incentive for that one hour of painstakingly boring activity, so the participants had to justify that they had fun anyway.

Famous Case Studies in Psychology

9. little albert.

In 1920, behaviourist theorists John Watson and Rosalie Rayner experimented on a 9-month-old baby to test the effects of classical conditioning in instilling fear in humans.

This was such a controversial study that it gained popularity in psychology textbooks and syllabi because it is a classic example of unethical research studies done in the name of science.

In one of the experiments, Little Albert was presented with a harmless stimulus or object, a white rat, which he wasn’t scared of at first. But every time Little Albert would see the white rat, the researchers would play a scary sound of hammer and steel. After about 6 pairings, Little Albert learned to fear the rat even without the scary sound.

Little Albert developed signs of fear to different objects presented to him through classical conditioning . He even generalized his fear to other stimuli not present in the course of the experiment.

10. Phineas Gage

Phineas Gage is such a celebrity in Psych 101 classes, even though the way he rose to popularity began with a tragic accident. He was a resident of Central Vermont and worked in the construction of a new railway line in the mid-1800s. One day, an explosive went off prematurely, sending a tamping iron straight into his face and through his brain.

Gage survived the accident, fortunately, something that is considered a feat even up to this day. He managed to find a job as a stagecoach after the accident. However, his family and friends reported that his personality changed so much that “he was no longer Gage” (Harlow, 1868).

New evidence on the case of Phineas Gage has since come to light, thanks to modern scientific studies and medical tests. However, there are still plenty of mysteries revolving around his brain damage and subsequent recovery.

11. Anna O.

Anna O., a social worker and feminist of German Jewish descent, was one of the first patients to receive psychoanalytic treatment.

Her real name was Bertha Pappenheim and she inspired much of Sigmund Freud’s works and books on psychoanalytic theory, although they hadn’t met in person. Their connection was through Joseph Breuer, Freud’s mentor when he was still starting his clinical practice.

Anna O. suffered from paralysis, personality changes, hallucinations, and rambling speech, but her doctors could not find the cause. Joseph Breuer was then called to her house for intervention and he performed psychoanalysis, also called the “talking cure”, on her.

Breuer would tell Anna O. to say anything that came to her mind, such as her thoughts, feelings, and childhood experiences. It was noted that her symptoms subsided by talking things out.

However, Breuer later referred Anna O. to the Bellevue Sanatorium, where she recovered and set out to be a renowned writer and advocate of women and children.

12. Patient HM

H.M., or Henry Gustav Molaison, was a severe amnesiac who had been the subject of countless psychological and neurological studies.

Henry was 27 when he underwent brain surgery to cure the epilepsy that he had been experiencing since childhood. In an unfortunate turn of events, he lost his memory because of the surgery and his brain also became unable to store long-term memories.

He was then regarded as someone living solely in the present, forgetting an experience as soon as it happened and only remembering bits and pieces of his past. Over the years, his amnesia and the structure of his brain had helped neuropsychologists learn more about cognitive functions .

Suzanne Corkin, a researcher, writer, and good friend of H.M., recently published a book about his life. Entitled Permanent Present Tense , this book is both a memoir and a case study following the struggles and joys of Henry Gustav Molaison.

13. Chris Sizemore

Chris Sizemore gained celebrity status in the psychology community when she was diagnosed with multiple personality disorder, now known as dissociative identity disorder.

Sizemore has several alter egos, which included Eve Black, Eve White, and Jane. Various papers about her stated that these alter egos were formed as a coping mechanism against the traumatic experiences she underwent in her childhood.

Sizemore said that although she has succeeded in unifying her alter egos into one dominant personality, there were periods in the past experienced by only one of her alter egos. For example, her husband married her Eve White alter ego and not her.

Her story inspired her psychiatrists to write a book about her, entitled The Three Faces of Eve , which was then turned into a 1957 movie of the same title.

14. David Reimer

When David was just 8 months old, he lost his penis because of a botched circumcision operation.

Psychologist John Money then advised Reimer’s parents to raise him as a girl instead, naming him Brenda. His gender reassignment was supported by subsequent surgery and hormonal therapy.

Money described Reimer’s gender reassignment as a success, but problems started to arise as Reimer was growing up. His boyishness was not completely subdued by the hormonal therapy. When he was 14 years old, he learned about the secrets of his past and he underwent gender reassignment to become male again.

Reimer became an advocate for children undergoing the same difficult situation he had been. His life story ended when he was 38 as he took his own life.

15. Kim Peek

Kim Peek was the inspiration behind Rain Man , an Oscar-winning movie about an autistic savant character played by Dustin Hoffman.

The movie was released in 1988, a time when autism wasn’t widely known and acknowledged yet. So it was an eye-opener for many people who watched the film.

In reality, Kim Peek was a non-autistic savant. He was exceptionally intelligent despite the brain abnormalities he was born with. He was like a walking encyclopedia, knowledgeable about travel routes, US zip codes, historical facts, and classical music. He also read and memorized approximately 12,000 books in his lifetime.

This list of experiments and case studies in psychology is just the tip of the iceberg! There are still countless interesting psychology studies that you can explore if you want to learn more about human behavior and dynamics.

You can also conduct your own mini-experiment or participate in a study conducted in your school or neighborhood. Just remember that there are ethical standards to follow so as not to repeat the lasting physical and emotional harm done to Little Albert or the Stanford Prison Experiment participants.

Asch, S. E. (1956). Studies of independence and conformity: I. A minority of one against a unanimous majority. Psychological Monographs: General and Applied, 70 (9), 1–70. https://doi.org/10.1037/h0093718

Bandura, A., Ross, D., & Ross, S. A. (1961). Transmission of aggression through imitation of aggressive models. The Journal of Abnormal and Social Psychology, 63 (3), 575–582. https://doi.org/10.1037/h0045925

Elliott, J., Yale University., WGBH (Television station : Boston, Mass.), & PBS DVD (Firm). (2003). A class divided. New Haven, Conn.: Yale University Films.

Festinger, L., & Carlsmith, J. M. (1959). Cognitive consequences of forced compliance. The Journal of Abnormal and Social Psychology, 58 (2), 203–210. https://doi.org/10.1037/h0041593

Haney, C., Banks, W. C., & Zimbardo, P. G. (1973). A study of prisoners and guards in a simulated prison. Naval Research Review , 30 , 4-17.

Latane, B., & Darley, J. M. (1968). Group inhibition of bystander intervention in emergencies. Journal of Personality and Social Psychology, 10 (3), 215–221. https://doi.org/10.1037/h0026570

Mischel, W. (2014). The Marshmallow Test: Mastering self-control. Little, Brown and Co.

Thorndike, E. (1920) A Constant Error in Psychological Ratings. Journal of Applied Psychology , 4 , 25-29. http://dx.doi.org/10.1037/h0071663

Watson, J. B., & Rayner, R. (1920). Conditioned emotional reactions. Journal of experimental psychology , 3 (1), 1.

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Classic Case Studies in Psychology

3rd Edition

The human mind is both extraordinary and compelling. But this is more than a collection of case studies; it is a selection of stories that illustrate some of the most extreme forms of human behaviour. From the leader who convinced his followers to kill themselves to the man who lost his memory; from the boy who was brought up as a girl to the woman with several personalities, Geoff Rolls illustrates some of the most fundamental tenets of psychology. Each case study has provided invaluable insights for scholars and researchers, and amazed the public at large. Several have been the inspiration for works of fiction, for example the story of Kim Peek, the real Rain Man.

This new edition features three new case studies, including the story of Charles Decker, who was tried for the attempted murder of two people but acquitted on the basis of a neurological condition, and Dorothy Martin, whose persisting belief in an impending alien invasion is an illuminating example of cognitive dissonance. In addition, each case study is contextualized with more typical behaviour, while the latest thinking in each sub-field is also discussed.

Classic Case Studies in Psychology  is accessibly written and requires no prior knowledge of psychology, just an interest in the human condition. It is a book that will amaze, sometimes disturb, but above all enlighten its readers.

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Psychology’s 10 greatest case studies – digested

These ten characters have all had a huge influence on psychology and their stories continue to intrigue each new generation of students. What’s particularly fascinating is that many of their stories continue to evolve – new evidence comes to light, or new technologies are brought to bear, changing how the cases are interpreted and understood. What many of these 10 also have in common is that they speak to some of the perennial debates in psychology, about personality and identity, nature and nurture, and the links between mind and body.

Phineas Gage

One day in 1848 in Central Vermont, Phineas Gage was tamping explosives into the ground to prepare the way for a new railway line when he had a terrible accident. The detonation went off prematurely, and his tamping iron shot into his face, through his brain, and out the top of his head.

Remarkably Gage survived, although his friends and family reportedly felt he was changed so profoundly (becoming listless and aggressive) that “he was no longer Gage.” There the story used to rest – a classic example of frontal brain damage affecting personality. However, recent years have seen  a drastic reevaluation  of Gage’s story in light of new evidence. It’s now believed that he underwent significant rehabilitation and in fact began work as a horse carriage driver in Chile. A  simulation of his injuries  suggested much of his right frontal cortex was likely spared, and  photographic evidence  has been unearthed showing a post-accident dapper Gage. Not that you’ll find this revised account in many psychology textbooks:  a recent analysis  showed that few of them have kept up to date with the new evidence.

Henry Gustav Molaison (known for years as H.M. in the literature to protect his privacy), who died in 2008, developed severe amnesia at age 27 after undergoing brain surgery as a form of treatment for the epilepsy he’d suffered since childhood. He was subsequently the focus of study by over 100 psychologists and neuroscientists and he’s been mentioned in over 12,000 journal articles! Molaison’s surgery involved the removal of large parts of the hippocampus on both sides of his brain and the result was that he was almost entirely unable to store any new information in long-term memory (there were some exceptions – for example, after 1963 he was aware that a US president had been assassinated in Dallas). The extremity of Molaison’s deficits was a surprise to experts of the day because many of them believed that memory was distributed throughout the cerebral cortex. Today, Molaison’s legacy lives on: his brain was carefully sliced and preserved and turned into a 3D digital atlas and his life story is reportedly due to be turned into a feature film based on the book researcher Suzanne Corkin wrote about him:  Permanent Present Tense, The Man With No Memory and What He Taught The World .

Victor Leborgne (nickname “Tan”)

The fact that, in most people, language function is served predominantly by the left frontal cortex has today almost become common knowledge, at least among psych students. However, back in the early nineteenth century, the consensus view was that language function (like memory, see entry for H.M.) was distributed through the brain. An eighteenth century patient who helped change that was Victor Leborgne, a Frenchman who was nicknamed “Tan” because that was the only sound he could utter (besides the expletive phrase “sacre nom de Dieu”). In 1861, aged 51, Leborgne was referred to the renowned neurologist Paul Broca, but died soon after. Broca examined Leborgne’s brain and noticed a lesion in his left frontal lobe – a segment of tissue now known as Broca’s area. Given Leborgne’s impaired speech but intact comprehension, Broca concluded that this area of the brain was responsible for speech production and he set about persuading his peers of this fact – now recognised as a key moment in psychology’s history. For decades little was known about Leborgne, besides his important contribution to science. However, in a paper published in 2013, Cezary Domanski at Maria Curie-Sklodowska University in Poland uncovered new biographical details, including the possibility that Leborgne muttered the word “Tan” because his birthplace of Moret, home to several tanneries.

Wild Boy of Aveyron

The “Wild boy of Aveyron” – named Victor by the physician Jean-Marc Itard – was found emerging from Aveyron forest in South West France in 1800, aged 11 or 12, where’s it’s thought he had been living in the wild for several years. For psychologists and philosophers, Victor became a kind of “natural experiment” into the question of nature and nurture. How would he be affected by the lack of human input early in his life? Those who hoped Victor would support the notion of the “noble savage” uncorrupted by modern civilisation were largely disappointed: the boy was dirty and dishevelled, defecated where he stood and apparently motivated largely by hunger. Victor acquired celebrity status after he was transported to Paris and Itard began a mission to teach and socialise the “feral child”. This programme met with mixed success: Victor never learned to speak fluently, but he dressed, learned civil toilet habits, could write a few letters and acquired some very basic language comprehension. Autism expert Uta Frith believes Victor may have been abandoned because he was autistic, but she acknowledges we will never know the truth of his background. Victor’s story inspired the 2004 novel  The Wild Boy  and was dramatised in the 1970 French film  The Wild Child .

Nicknamed ‘Kim-puter’ by his friends, Peek who died in 2010 aged 58, was the inspiration for Dustin Hoffman’s autistic savant character in the multi-Oscar-winning film  Rain Man . Before that movie, which was released in 1988, few people had heard of autism, so Peek via the film can be credited with helping to raise the profile of the condition. Arguably though, the film also helped spread the popular misconception that giftedness is a hallmark of autism (in one notable scene, Hoffman’s character deduces in an instant the precise number of cocktail sticks – 246 – that a waitress drops on the floor). Peek himself was actually a non-autistic savant, born with brain abnormalities including a malformed cerebellum and an absent corpus callosum (the massive bundle of tissue that usually connects the two hemispheres). His savant skills were astonishing and included calendar calculation, as well as an encyclopaedic knowledge of history, literature, classical music, US zip codes and travel routes. It was estimated that he read more than 12,000 books in his life time, all of them committed to flawless memory. Although outgoing and sociable, Peek had coordination problems and struggled with abstract or conceptual thinking.

“Anna O.” is the pseudonym for Bertha Pappenheim, a pioneering German Jewish feminist and social worker who died in 1936 aged 77. As Anna O. she is known as one of the first ever patients to undergo psychoanalysis and her case inspired much of Freud’s thinking on mental illness. Pappenheim first came to the attention of another psychoanalyst, Joseph Breuer, in 1880 when he was called to her house in Vienna where she was lying in bed, almost entirely paralysed. Her other symptoms include hallucinations, personality changes and rambling speech, but doctors could find no physical cause. For 18 months, Breuer visited her almost daily and talked to her about her thoughts and feelings, including her grief for her father, and the more she talked, the more her symptoms seemed to fade – this was apparently one of the first ever instances of psychoanalysis or “the talking cure”, although the degree of Breuer’s success has been disputed and some historians allege that Pappenheim did have an organic illness, such as epilepsy. Although Freud never met Pappenheim, he wrote about her case, including the notion that she had a hysterical pregnancy, although this too is disputed. The latter part of Pappenheim’s life in Germany post 1888 is as remarkable as her time as Anna O. She became a prolific writer and social pioneer, including authoring stories, plays, and translating seminal texts, and she founded social clubs for Jewish women, worked in orphanages and founded the German Federation of Jewish Women.

Kitty Genovese

Sadly, it is not really Kitty Genovese the person who has become one of psychology’s classic case studies, but rather the terrible fate that befell her. In 1964 in New York, Genovese was returning home from her job as a bar maid when she was attacked and eventually murdered by Winston Mosely. What made this tragedy so influential to psychology was that it inspired research into what became known as the Bystander Phenomenon – the now well-established finding that our sense of individual responsibility is diluted by the presence of other people. According to folklore, 38 people watched Genovese’s demise yet not one of them did anything to help, apparently a terrible real life instance of the Bystander Effect. However, the story doesn’t end there because historians have since established  the reality was much more complicated  – at least two people did try to summon help, and actually there was only one witness the second and fatal attack. While the main principle of the Bystander Effect has stood the test of time, modern psychology’s understanding of the way it works has become a lot more nuanced. For example, there’s evidence that in some situations people are more likely to act when they’re part of a larger group, such as when they and the other group members all belong to the same social category (such as all being women) as the victim.

Little Albert

“Little Albert” was the nickname that the pioneering behaviourist psychologist John Watson gave to an 11-month-old baby, in whom, with his colleague and future wife Rosalind Rayner, he deliberately attempted to instill certain fears through a process of conditioning. The research, which was of dubious scientific quality, was conducted in 1920 and has become notorious for being so unethical (such a procedure would never be given approval in modern university settings). Interest in Little Albert has reignited in recent years as an academic quarrel has erupted over his true identity. A group led by Hall Beck at Appalachian University announced in 2011 that they thought Little Albert was actually Douglas Merritte, the son of a wet nurse at John Hopkins University where Watson and Rayner were based. According to this sad account, Little Albert was neurologically impaired, compounding the unethical nature of the Watson/Rayner research, and he died aged six of  hydrocephalus (fluid on the brain). However, this account was challenged by a different group of scholars led by Russell Powell at MacEwan University in 2014. They established that Little Albert was more likely William A Barger (recorded in his medical file as Albert Barger), the son of a different wet nurse. Earlier this year, textbook writer Richard Griggs weighed up all the evidence and concluded that the Barger story is the more credible, which would mean that Little Albert in fact died 2007 aged 87.

Chris Sizemore

Chris Costner Sizemore is one of the most famous patients to be given the controversial diagnosis of multiple personality disorder, known today as dissociative identity disorder. Sizemore’s alter egos apparently included Eve White, Eve Black, Jane and many others. By some accounts, Sizemore expressed these personalities as a coping mechanism in the face of traumas she experienced in childhood, including seeing her mother badly injured and a man sawn in half at a lumber mill. In recent years, Sizemore has described how her alter egos have been combined into one united personality for many decades, but she still sees different aspects of her past as belonging to her different personalities. For example, she has stated that her husband was married to Eve White (not her), and that Eve White is the mother of her first daughter. Her story was turned into a movie in 1957 called  The Three Faces of Eve  (based on a book of the same name written by her psychiatrists). Joanne Woodward won the best actress Oscar for portraying Sizemore and her various personalities in this film. Sizemore published her autobiography in 1977 called  I’m Eve . In 2009, she appeared on the BBC’s  Hard Talk  interview show.

David Reimer

One of the most famous patients in psychology, Reimer lost his penis in a botched circumcision operation when he was just 8 months old. His parents were subsequently advised by psychologist John Money to raise Reimer as a girl, “Brenda”, and for him to undergo further surgery and hormone treatment to assist his gender reassignment.

Money initially described the experiment (no one had tried anything like this before) as a huge success that appeared to support his belief in the important role of socialisation, rather than innate factors, in children’s gender identity. In fact, the reassignment was seriously problematic and Reimer’s boyishness was never far beneath the surface. When he was aged 14, Reimer was told the truth about his past and set about reversing the gender reassignment process to become male again. He later campaigned against other children with genital injuries being gender reassigned in the way that he had been. His story was turned into the book  As Nature Made Him, The Boy Who Was Raised As A Girl  by John Colapinto, and he is the subject of two BBC Horizon documentaries. Tragically, Reimer took his own life in 2004, aged just 38.

Christian Jarrett  ( @Psych_Writer ) is Editor of  BPS Research Digest

This article was originally published on  BPS Research Digest . Read the  original article .

Classic Case Studies in Psychology 4th Edition

• Author(s) Geoff Rolls
• Publisher Routledge

Print ISBN 9780367267087, 036726708X

Etext isbn 9781000750843, 1000750841.

• Edition 4th
• Copyright 2020
• Available from $ 26.95 USD SKU: 9781000750843R180

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Classic Case Studies in Psychology: Third edition Paperback – 25 November 2014

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The human mind is both extraordinary and compelling. But this is more than a collection of case studies; it is a selection of stories that illustrate some of the most extreme forms of human behaviour. From the leader who convinced his followers to kill themselves to the man who lost his memory; from the boy who was brought up as a girl to the woman with several personalities, Geoff Rolls illustrates some of the most fundamental tenets of psychology. Each case study has provided invaluable insights for scholars and researchers, and amazed the public at large. Several have been the inspiration for works of fiction, for example the story of Kim Peek, the real Rain Man.

This new edition features three new case studies, including the story of Charles Decker, who was tried for the attempted murder of two people but acquitted on the basis of a neurological condition, and Dorothy Martin, whose persisting belief in an impending alien invasion is an illuminating example of cognitive dissonance. In addition, each case study is contextualized with more typical behaviour, while the latest thinking in each sub-field is also discussed.

Classic Case Studies in Psychology is accessibly written and requires no prior knowledge of psychology, just an interest in the human condition. It is a book that will amaze, sometimes disturb, but above all enlighten its readers.

• Print length 330 pages
• Language English
• Publisher Routledge
• Publication date 25 November 2014
• Dimensions 15.6 x 1.91 x 23.39 cm
• ISBN-10 9781848722705
• ISBN-13 978-1848722705
• See all details

Product description

"First published in 2005, this volume can be appreciated by a wide audience. Readers will appreciate the clarity of writing, appositive definitions, and the clear glossary. Historical and social contexts are vividly evoked. Many chapters include photos. A compelling textbook or reader for introductory, clinical, or history of psychology courses, the book should also be of significant interest to sociologists and historians. The third edition includes three new chapters. Summing Up: Recommended" - C. T. Fischer, emeritus, Duquesne University, USA, in CHOICE , July 2015

"This book gives a wonderful flavour of the wide variety of topics within psychology, and features some of the most well-known and influential case studies alongside those which have received less attention. Rolls demonstrates a deep understanding of his subject matter, and his clear style of presentation ensures the key aspects of each case study are covered in an accessible and engaging way without losing academic substance. I thought I was familiar with many of the case studies but I learned something new from each chapter and especially appreciated the unique focus on the personal stories of the people at the centre of each case study." – Dr Mandy Robbins, Glyndwr University and University of Warwick, UK

"This engaging new edition gives valuable insight into the lives and worlds of the famous names encountered by every student of psychology. It provides a greater context to the individual cases by illustrating their impact on psychology, and by explaining what happened to the individuals throughout the course of their lives." – Jamie Davies, Teacher of Psychology, Wyke Sixth Form College, Hull, UK, and editor of psychoblog

About the Author

Geoff Rolls is Head of Psychology at Peter Symonds College in Winchester and formerly a Research Fellow at Southampton University, UK.

Product details

• ASIN ‏ : ‎ 1848722702
• Publisher ‏ : ‎ Routledge; 1st edition (25 November 2014)
• Language ‏ : ‎ English
• Paperback ‏ : ‎ 330 pages
• ISBN-10 ‏ : ‎ 9781848722705
• ISBN-13 ‏ : ‎ 978-1848722705
• Item Weight ‏ : ‎ 567 g
• Dimensions ‏ : ‎ 15.6 x 1.91 x 23.39 cm
• #648 in Psychopathology
• #82,605 in Society & Social Sciences

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G. w. p. rolls.

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Classic Case Studies in Psychology: Third edition 1st Edition

The human mind is both extraordinary and compelling. But this is more than a collection of case studies; it is a selection of stories that illustrate some of the most extreme forms of human behaviour. From the leader who convinced his followers to kill themselves to the man who lost his memory; from the boy who was brought up as a girl to the woman with several personalities, Geoff Rolls illustrates some of the most fundamental tenets of psychology. Each case study has provided invaluable insights for scholars and researchers, and amazed the public at large. Several have been the inspiration for works of fiction, for example the story of Kim Peek, the real Rain Man.

This new edition features three new case studies, including the story of Charles Decker, who was tried for the attempted murder of two people but acquitted on the basis of a neurological condition, and Dorothy Martin, whose persisting belief in an impending alien invasion is an illuminating example of cognitive dissonance. In addition, each case study is contextualized with more typical behaviour, while the latest thinking in each sub-field is also discussed.

Classic Case Studies in Psychology is accessibly written and requires no prior knowledge of psychology, just an interest in the human condition. It is a book that will amaze, sometimes disturb, but above all enlighten its readers.

• ISBN-10 9781848722705
• ISBN-13 978-1848722705
• Edition 1st
• Publisher 9781848722705
• Publication date November 24, 2014
• Language English
• Dimensions 6.14 x 0.75 x 9.21 inches
• Print length 330 pages
• See all details

Editorial Reviews

"First published in 2005, this volume can be appreciated by a wide audience. Readers will appreciate the clarity of writing, appositive definitions, and the clear glossary. Historical and social contexts are vividly evoked. Many chapters include photos. A compelling textbook or reader for introductory, clinical, or history of psychology courses, the book should also be of significant interest to sociologists and historians. The third edition includes three new chapters. Summing Up: Recommended" - C. T. Fischer, emeritus, Duquesne University, USA, in CHOICE , July 2015

"This book gives a wonderful flavour of the wide variety of topics within psychology, and features some of the most well-known and influential case studies alongside those which have received less attention. Rolls demonstrates a deep understanding of his subject matter, and his clear style of presentation ensures the key aspects of each case study are covered in an accessible and engaging way without losing academic substance. I thought I was familiar with many of the case studies but I learned something new from each chapter and especially appreciated the unique focus on the personal stories of the people at the centre of each case study." – Dr Mandy Robbins, Glyndwr University and University of Warwick, UK

"This engaging new edition gives valuable insight into the lives and worlds of the famous names encountered by every student of psychology. It provides a greater context to the individual cases by illustrating their impact on psychology, and by explaining what happened to the individuals throughout the course of their lives." – Jamie Davies, Teacher of Psychology, Wyke Sixth Form College, Hull, UK, and editor of psychoblog

About the Author

Geoff Rolls is Head of Psychology at Peter Symonds College in Winchester and formerly a Research Fellow at Southampton University, UK.

Product details

• ASIN ‏ : ‎ 1848722702
• Publisher ‏ : ‎ 9781848722705; 1st edition (November 24, 2014)
• Language ‏ : ‎ English
• Paperback ‏ : ‎ 330 pages
• ISBN-10 ‏ : ‎ 9781848722705
• ISBN-13 ‏ : ‎ 978-1848722705
• Item Weight ‏ : ‎ 1.25 pounds
• Dimensions ‏ : ‎ 6.14 x 0.75 x 9.21 inches
• #12,232 in Psychology (Books)
• #16,098 in Medical General Psychology
• #62,086 in Type

About the author

G. w. p. rolls.

Discover more of the author’s books, see similar authors, read author blogs and more

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