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Love research? Interested in taking what you learned in a PSYCH 4998 lab further? Consider completing a undergraduate thesis in psychology!

To Graduate “With Research Distinction in Psychology” a Student Must:  

• Be a psychology major (if you are an honors student, see "Honors Research Distinction in Psychology" below
• Graduate with at least a 3.0 overall GPA
• Take PSYCH 4999.01 and 4999.02 (Both of these course are  only  offered in Spring semester)
• Write and successfully defend a Psychology Thesis

The Thesis is independent research conducted by the student and supervised by a psychology faculty member. The Psychology Department requires completion of a two-course sequence (PSYCH 4999.01 and 4999.02). Each course is taught in subsequent spring semesters. For example, students on a traditional four-year plan would take Psychology 4999.01 in spring semester of their junior year and PSYCH 4999.02 in spring semester of their senior year. However, with support of the Faculty Thesis Advisor, a students may begin a Thesis and Psychology 4999.01 in spring of their sophomore year.

To Graduate “With Honors Research Distinction in Psychology” a Student Must:  

• Be a psychology major
• Be a member of the Arts and Sciences Honors Program
• Graduate with at least a 3.4 overall GPA
• Complete the psychology major Honors Contract Requirements
• Take PSYCH 4999.01H and 4999.02H (Both of these courses are  only  offered in Spring semester)
• Write and successfully defend a Psychology Honors Thesis

The Honors Thesis is independent research conducted by the student and supervised by a psychology faculty member (only tenured or tenure-track faculty may advise an Honors Thesis). The Psychology Department requires completion of a two-course sequence (PSYCH 4999.01H and 4999.02H). Each course is taught in subsequent spring semesters. For example, a student on a traditional four-year plan would take PSYCH 4999.01H in spring semester of their junior year and PSYCH 4999.02H in spring semester of their senior year. However, with support of the Faculty Honors Thesis Advisor, a student may begin an Honors Thesis and Psychology 4999.01H in spring of their sophomore year.

Frequently Asked Questions

Talk to your psychology advisor, attend our annual Psychology Enrichment Program “Getting Involved in Research in the Psychology Department,” attend the annual Psychology Undergraduate Research Colloquium, explore the PSYCH 4998 opportunities, or talk to your fellow students who are in research labs.

Students interested in pursuing a Thesis or Honors Thesis should begin participating in research (PSYCH 4998) no later than their sophomore year.

Students should secure a Faculty Thesis Advisor by fall semester of the junior year (typically this will be a faculty member with whom you completed 4998 research).

Go to the Be a Research Assistant webpage and find a project that sparks your interest. Check out the lab websites and start applying. It is recommended to apply to 5-7 labs. Once accepted, you can negotiate your hours and responsibilities (this will determine the number of credit hours you receive), have the faculty member sign a course enrollment form (s/he will have the class number), take the course enrollment form to the Psychology Advising Office (PS 015) or email it to [email protected] .

To enroll in PSYCH 4999.01 or 4999.01H, students should complete the Psychology Thesis/Honors Thesis Application. The application requires the signature of the Faculty Thesis Advisor. Once this is turned in to [email protected], students will be enrolled in PSYCH 4999.01 or 4999.01H.

For non-Honors students:

You must submit a Thesis Application with the  College of Arts and Sciences  (under Research Distinction) at least one term before your graduating term. You will need to submit a research proposal and your Faculty Thesis Advisor’s signature on the application form. You will need to schedule an appointment with your Psychology Advisor to complete the Major Program Form on the application.

For Honors students:

The application to graduate with Honors Research Distinction is available from the  Arts and Sciences Honors Office . You will need to submit a research proposal and your Faculty Thesis Advisor’s signature on the application form. If you do not have an approved Honors Contract on file at the Honors Office, you will need to call (614) 292-5750 to schedule an appointment with the Psychology Honors Advisor to complete the Major Program Form of the application (you will have to complete the psychology major contract requirements).

After you have successfully completed your written Thesis document, you will have an hour-long meeting with your Faculty Thesis Advisor and one other faculty member. You will describe your Thesis project to them, and they will ask you questions about your work. You must defend your Thesis at least two weeks before the end of the term you graduate.

noun. 1. with regard to logic, a proposition to be exposed to logical study in effort to establish proof or disproof. 2. more generally, any idea or proposition put forth within an argument . 3. with regard to philosophy , the initial phase of a dialectical process: a proposition which is opposed by an anti-thesis, thereby producing a new proposition called a synthesis . 4. a dissertation based upon unique research , particularly one needed for an advanced academic degree.

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Reading Sample Theses

As you prepare for your thesis, you might want to get a sense of what you can accomplish in your finished product. Reading past theses can show you the scope and nature of well-done undergraduate projects. Because theses in different areas of psychology often look quite different, it will help you to examine several in the same general area you plan to conduct your research in.

The Psychology Undergraduate Office has hard copies of several prize-winning theses from the past five years that you may sign out to see what the best undergraduate work looks like. Above, you can browse the titles of past undergraduate theses to give you an idea of the topics of theses students typically write.

Only hard copies of recent prize-winning theses are currently available.

Please note: Recent theses stored in the Social Relations Library (which recently closed) are unavailable. Inquirers needing a thesis that is not listed in HOLLIS should contact the authors of theses directly to attempt to obtain a copy.  

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4. a dissertation based on original research, especially one required for an advanced academic degree.

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Creating Your Bachelor's Thesis

It should be at least 15 pages in length, excluding title page, table of contents, acknowledgements, figures, tables, captions, and references. You should use this template to format your title and introductory pages. The style should follow accepted professional standards for your discipline. The thesis must be written in a language that is understandable by any professor in psychology or related field. Your thesis must be formatted in accordance with the Instructions for the Submission of a Bachelors's Thesis for All Levels of Distinction. These instructions are also available in Rooms 12 or 321 Psychology Building. The thesis should consist of:

Title:  The title should describe your thesis clearly with as few words as possible.

Abstract:  The abstract should present a very short synopsis of your thesis.

Introduction:  The Introduction should describe the problem your thesis addresses, review the previous relevant literature, and describe the objectives of the research. In essence, the introduction should make clear to the reader what the question or hypothesis is, why it is important and how your research will help answer the question.

Methods:  The Methods section should convey how the research was conducted so that others can replicate and evaluate what was done. This includes a description of the experimental design, of details on how the experiments were conducted, and of the analytical techniques including any statistical or qualitative analyses used.

Results:  This section should describe in detail the findings from the experiments. The experimental data should be shown in graph, figure or table formats with appropriate, clear, legible labels and captions. If the experimental results are quantitative, then the appropriate statistical analyses must be used. For qualitative research, the Results section must provide support (e.g. verbatim; narrative; interpretation) for warranted conclusions and describe the efforts employed to ensure rigor with attention to both the specific approach and qualitative standards, in general. Research that consists of an individual case study is NOT acceptable. You must have data to write the Results section. Only in rare cases will the Distinction Committee consider a thesis for distinction without data. In these cases, a letter from the faculty mentor must explain the challenges that prevented the student from collecting data, and the Results section must include how you would have analyzed the data and what you would have expected the data to show.

Discussion:  The Discussion section should be your evaluation of the results. You should discuss what the results mean, what their implications are, what the drawbacks (if any) are, and what the future directions of the research might be. The findings and their importance should be put in context for your field and clearly convey the contributions of your work to your field of study. You should show that you have carefully thought about the results, their implications, and that you can think on your own.

Acknowledgments:  Thank any coworkers who made your work possible.

References:  You should have an adequate bibliography with complete references formatted appropriately for a journal in your area of psychology.

Important:  Turn in the electronic copy to Joshua Gulley ([email protected]), Associate Head for Undergraduate Studies, BEFORE printing your Bachelor's Thesis. This will allow the format of the thesis to be checked and any formatting errors can be corrected prior to printing the hard copies.

The thesis will be read by the Undergraduate Distinction Committee and evaluated using the above criteria for each section of the thesis along with the letter of support from the research advisor. If the research area falls outside the research expertise of the Committee, other members of the faculty may be asked to evaluate the thesis.

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• How to Write a Thesis Statement | 4 Steps & Examples

How to Write a Thesis Statement | 4 Steps & Examples

Published on January 11, 2019 by Shona McCombes . Revised on August 15, 2023 by Eoghan Ryan.

A thesis statement is a sentence that sums up the central point of your paper or essay . It usually comes near the end of your introduction .

Your thesis will look a bit different depending on the type of essay you’re writing. But the thesis statement should always clearly state the main idea you want to get across. Everything else in your essay should relate back to this idea.

You can write your thesis statement by following four simple steps:

• Start with a question
• Write your initial answer
• Develop your answer
• Refine your thesis statement

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Table of contents

What is a thesis statement, placement of the thesis statement, step 1: start with a question, step 2: write your initial answer, step 3: develop your answer, step 4: refine your thesis statement, types of thesis statements, other interesting articles, frequently asked questions about thesis statements.

A thesis statement summarizes the central points of your essay. It is a signpost telling the reader what the essay will argue and why.

The best thesis statements are:

• Concise: A good thesis statement is short and sweet—don’t use more words than necessary. State your point clearly and directly in one or two sentences.
• Contentious: Your thesis shouldn’t be a simple statement of fact that everyone already knows. A good thesis statement is a claim that requires further evidence or analysis to back it up.
• Coherent: Everything mentioned in your thesis statement must be supported and explained in the rest of your paper.

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The thesis statement generally appears at the end of your essay introduction or research paper introduction .

The spread of the internet has had a world-changing effect, not least on the world of education. The use of the internet in academic contexts and among young people more generally is hotly debated. For many who did not grow up with this technology, its effects seem alarming and potentially harmful. This concern, while understandable, is misguided. The negatives of internet use are outweighed by its many benefits for education: the internet facilitates easier access to information, exposure to different perspectives, and a flexible learning environment for both students and teachers.

You should come up with an initial thesis, sometimes called a working thesis , early in the writing process . As soon as you’ve decided on your essay topic , you need to work out what you want to say about it—a clear thesis will give your essay direction and structure.

You might already have a question in your assignment, but if not, try to come up with your own. What would you like to find out or decide about your topic?

For example, you might ask:

After some initial research, you can formulate a tentative answer to this question. At this stage it can be simple, and it should guide the research process and writing process .

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Now you need to consider why this is your answer and how you will convince your reader to agree with you. As you read more about your topic and begin writing, your answer should get more detailed.

In your essay about the internet and education, the thesis states your position and sketches out the key arguments you’ll use to support it.

The negatives of internet use are outweighed by its many benefits for education because it facilitates easier access to information.

In your essay about braille, the thesis statement summarizes the key historical development that you’ll explain.

The invention of braille in the 19th century transformed the lives of blind people, allowing them to participate more actively in public life.

A strong thesis statement should tell the reader:

• Why you hold this position
• What they’ll learn from your essay
• The key points of your argument or narrative

The final thesis statement doesn’t just state your position, but summarizes your overall argument or the entire topic you’re going to explain. To strengthen a weak thesis statement, it can help to consider the broader context of your topic.

These examples are more specific and show that you’ll explore your topic in depth.

Your thesis statement should match the goals of your essay, which vary depending on the type of essay you’re writing:

• In an argumentative essay , your thesis statement should take a strong position. Your aim in the essay is to convince your reader of this thesis based on evidence and logical reasoning.
• In an expository essay , you’ll aim to explain the facts of a topic or process. Your thesis statement doesn’t have to include a strong opinion in this case, but it should clearly state the central point you want to make, and mention the key elements you’ll explain.

If you want to know more about AI tools , college essays , or fallacies make sure to check out some of our other articles with explanations and examples or go directly to our tools!

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A thesis statement is a sentence that sums up the central point of your paper or essay . Everything else you write should relate to this key idea.

The thesis statement is essential in any academic essay or research paper for two main reasons:

• It gives your writing direction and focus.
• It gives the reader a concise summary of your main point.

Without a clear thesis statement, an essay can end up rambling and unfocused, leaving your reader unsure of exactly what you want to say.

Follow these four steps to come up with a thesis statement :

• Ask a question about your topic .
• Write your initial answer.
• Develop your answer by including reasons.
• Refine your answer, adding more detail and nuance.

The thesis statement should be placed at the end of your essay introduction .

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McCombes, S. (2023, August 15). How to Write a Thesis Statement | 4 Steps & Examples. Scribbr. Retrieved August 29, 2024, from https://www.scribbr.com/academic-essay/thesis-statement/

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1st Edition

Writing Dissertations and Theses in Psychology A Student’s Guide for Success

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Description

This accessible guide equips students to succeed in their master’s thesis or doctoral dissertation in psychology. The authors provide concrete assistance to the myriad tasks and requirements that students will encounter as they plan, conduct, and present their dissertation or thesis research. Drawing upon their many years of experience in working with graduate students, the authors address the multiple stages of the dissertation and thesis process. They take you through drafting the proposal, the advisor-advisee relationship, interacting with committee members, the writing process, handling obstacles, and the final presentation. Chapters provide guidance on using a research team, collecting data, conducting a literature review, and even acquiring financial support. Finally, students will find additional resources such as practical information on copyright issues, research methods, case analyses, and teleconferencing. This is an essential book for both graduate psychology students working on their master’s theses or doctoral dissertations and their advisors.

Table of Contents

Stephen N. Haynes received his PhD from the University of Colorado, USA, in 1971 and is Emeritus Professor of Psychology at the University of Hawai‘i at Mānoa, USA. He has served on 14 editorial boards, published more than 130 articles and nine books, and supervised 70 theses and dissertations. John D. Hunsley received his PhD from the University of Waterloo, Canada, in 1985 and is Professor of Psychology at the University of Ottawa, Canada. He has served on numerous editorial boards and has authored over 140 articles, chapters, and books. He has supervised 17 doctoral dissertations and served on numerous dissertation committees.

Critics' Reviews

"Students can find the dissertation to be a daunting, anxiety filled process. They often feel at sea trying to complete an important task for which they do not have a good road map. They are not even sure what are the right questions to ask, let alone what the answers are. Faculty are not always helpful, since they often simply assume that the student understands the nature of the task. This book will be very useful to students, spelling out implicit assumptions and making the entire dissertation process less opaque and more manageable." – Kenneth Solberg , PhD, Saint Mary’s University of Minnesota, USA "Overall, I think that this book provides an important contribution to the literature and will help many graduate students to navigate through the dissertation process. I think the book is very good. In addition to excellent chapters on the process of completing a dissertation (from finding your advisor to defending and publishing the dissertation), there are a number of resources for students; covering strategies for overcoming various barriers and obstacles is also an important feature of the book." – David Dozois , PhD, Professor and Director, Clinical Psychology Graduate Program, University of Western Ontario, Canada

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UM-Dearborn Psychology Master's Theses

You can browse through theses from the UM-Dearborn Master's of Science in Psychology program in the UM-Dearborn Psychology collection and the broader UM Dissertations and Master's Thesis collection in  Deep Blue , the University of Michigan online institutional repository. Deep Blue is an open-access database that is also indexed in and searchable through Google Scholar. For more information contact the Psychology Librarian Nadine Anderson at [email protected] .

Master of Science in Health Psychology and Clinical Health Psychology Master's Thesis Guide

Students may elect to complete a Masters Thesis during the second year of the program. Students selecting this option will take 3 credits in an approved elective course and 6 thesis credits. Contact the program director, Dr. Michelle Leonard , and the Faculty and Student Guide to Graduate Thesis for more information.  Use the Master's Thesis Formatting Checklist  below to make sure that your thesis meets the Graduate Studies Office formatting requirements for Masters theses. 

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How to Write a Great Hypothesis

Hypothesis Definition, Format, Examples, and Tips

Verywell / Alex Dos Diaz

• The Scientific Method

Hypothesis Format

Falsifiability of a hypothesis.

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Hypothesis Types

Hypotheses examples.

• Collecting Data

A hypothesis is a tentative statement about the relationship between two or more variables. It is a specific, testable prediction about what you expect to happen in a study. It is a preliminary answer to your question that helps guide the research process.

Consider a study designed to examine the relationship between sleep deprivation and test performance. The hypothesis might be: "This study is designed to assess the hypothesis that sleep-deprived people will perform worse on a test than individuals who are not sleep-deprived."

At a Glance

A hypothesis is crucial to scientific research because it offers a clear direction for what the researchers are looking to find. This allows them to design experiments to test their predictions and add to our scientific knowledge about the world. This article explores how a hypothesis is used in psychology research, how to write a good hypothesis, and the different types of hypotheses you might use.

The Hypothesis in the Scientific Method

In the scientific method , whether it involves research in psychology, biology, or some other area, a hypothesis represents what the researchers think will happen in an experiment. The scientific method involves the following steps:

• Forming a question
• Performing background research
• Creating a hypothesis
• Designing an experiment
• Collecting data
• Analyzing the results
• Drawing conclusions
• Communicating the results

The hypothesis is a prediction, but it involves more than a guess. Most of the time, the hypothesis begins with a question which is then explored through background research. At this point, researchers then begin to develop a testable hypothesis.

Unless you are creating an exploratory study, your hypothesis should always explain what you  expect  to happen.

In a study exploring the effects of a particular drug, the hypothesis might be that researchers expect the drug to have some type of effect on the symptoms of a specific illness. In psychology, the hypothesis might focus on how a certain aspect of the environment might influence a particular behavior.

Remember, a hypothesis does not have to be correct. While the hypothesis predicts what the researchers expect to see, the goal of the research is to determine whether this guess is right or wrong. When conducting an experiment, researchers might explore numerous factors to determine which ones might contribute to the ultimate outcome.

In many cases, researchers may find that the results of an experiment  do not  support the original hypothesis. When writing up these results, the researchers might suggest other options that should be explored in future studies.

In many cases, researchers might draw a hypothesis from a specific theory or build on previous research. For example, prior research has shown that stress can impact the immune system. So a researcher might hypothesize: "People with high-stress levels will be more likely to contract a common cold after being exposed to the virus than people who have low-stress levels."

In other instances, researchers might look at commonly held beliefs or folk wisdom. "Birds of a feather flock together" is one example of folk adage that a psychologist might try to investigate. The researcher might pose a specific hypothesis that "People tend to select romantic partners who are similar to them in interests and educational level."

Elements of a Good Hypothesis

So how do you write a good hypothesis? When trying to come up with a hypothesis for your research or experiments, ask yourself the following questions:

• Is your hypothesis based on your research on a topic?
• Can your hypothesis be tested?
• Does your hypothesis include independent and dependent variables?

Before you come up with a specific hypothesis, spend some time doing background research. Once you have completed a literature review, start thinking about potential questions you still have. Pay attention to the discussion section in the  journal articles you read . Many authors will suggest questions that still need to be explored.

How to Formulate a Good Hypothesis

To form a hypothesis, you should take these steps:

• Collect as many observations about a topic or problem as you can.
• Evaluate these observations and look for possible causes of the problem.
• Create a list of possible explanations that you might want to explore.
• After you have developed some possible hypotheses, think of ways that you could confirm or disprove each hypothesis through experimentation. This is known as falsifiability.

In the scientific method ,  falsifiability is an important part of any valid hypothesis. In order to test a claim scientifically, it must be possible that the claim could be proven false.

Students sometimes confuse the idea of falsifiability with the idea that it means that something is false, which is not the case. What falsifiability means is that  if  something was false, then it is possible to demonstrate that it is false.

One of the hallmarks of pseudoscience is that it makes claims that cannot be refuted or proven false.

The Importance of Operational Definitions

A variable is a factor or element that can be changed and manipulated in ways that are observable and measurable. However, the researcher must also define how the variable will be manipulated and measured in the study.

Operational definitions are specific definitions for all relevant factors in a study. This process helps make vague or ambiguous concepts detailed and measurable.

For example, a researcher might operationally define the variable " test anxiety " as the results of a self-report measure of anxiety experienced during an exam. A "study habits" variable might be defined by the amount of studying that actually occurs as measured by time.

These precise descriptions are important because many things can be measured in various ways. Clearly defining these variables and how they are measured helps ensure that other researchers can replicate your results.

Replicability

One of the basic principles of any type of scientific research is that the results must be replicable.

Replication means repeating an experiment in the same way to produce the same results. By clearly detailing the specifics of how the variables were measured and manipulated, other researchers can better understand the results and repeat the study if needed.

Some variables are more difficult than others to define. For example, how would you operationally define a variable such as aggression ? For obvious ethical reasons, researchers cannot create a situation in which a person behaves aggressively toward others.

To measure this variable, the researcher must devise a measurement that assesses aggressive behavior without harming others. The researcher might utilize a simulated task to measure aggressiveness in this situation.

Hypothesis Checklist

• Does your hypothesis focus on something that you can actually test?
• Does your hypothesis include both an independent and dependent variable?
• Can you manipulate the variables?
• Can your hypothesis be tested without violating ethical standards?

The hypothesis you use will depend on what you are investigating and hoping to find. Some of the main types of hypotheses that you might use include:

• Simple hypothesis : This type of hypothesis suggests there is a relationship between one independent variable and one dependent variable.
• Complex hypothesis : This type suggests a relationship between three or more variables, such as two independent and dependent variables.
• Null hypothesis : This hypothesis suggests no relationship exists between two or more variables.
• Alternative hypothesis : This hypothesis states the opposite of the null hypothesis.
• Statistical hypothesis : This hypothesis uses statistical analysis to evaluate a representative population sample and then generalizes the findings to the larger group.
• Logical hypothesis : This hypothesis assumes a relationship between variables without collecting data or evidence.

A hypothesis often follows a basic format of "If {this happens} then {this will happen}." One way to structure your hypothesis is to describe what will happen to the  dependent variable  if you change the  independent variable .

The basic format might be: "If {these changes are made to a certain independent variable}, then we will observe {a change in a specific dependent variable}."

A few examples of simple hypotheses:

• "Students who eat breakfast will perform better on a math exam than students who do not eat breakfast."
• "Students who experience test anxiety before an English exam will get lower scores than students who do not experience test anxiety."​
• "Motorists who talk on the phone while driving will be more likely to make errors on a driving course than those who do not talk on the phone."
• "Children who receive a new reading intervention will have higher reading scores than students who do not receive the intervention."

Examples of a complex hypothesis include:

• "People with high-sugar diets and sedentary activity levels are more likely to develop depression."
• "Younger people who are regularly exposed to green, outdoor areas have better subjective well-being than older adults who have limited exposure to green spaces."

Examples of a null hypothesis include:

• "There is no difference in anxiety levels between people who take St. John's wort supplements and those who do not."
• "There is no difference in scores on a memory recall task between children and adults."
• "There is no difference in aggression levels between children who play first-person shooter games and those who do not."

Examples of an alternative hypothesis:

• "People who take St. John's wort supplements will have less anxiety than those who do not."
• "Adults will perform better on a memory task than children."
• "Children who play first-person shooter games will show higher levels of aggression than children who do not." 

Collecting Data on Your Hypothesis

Once a researcher has formed a testable hypothesis, the next step is to select a research design and start collecting data. The research method depends largely on exactly what they are studying. There are two basic types of research methods: descriptive research and experimental research.

Descriptive Research Methods

Descriptive research such as  case studies ,  naturalistic observations , and surveys are often used when  conducting an experiment is difficult or impossible. These methods are best used to describe different aspects of a behavior or psychological phenomenon.

Once a researcher has collected data using descriptive methods, a  correlational study  can examine how the variables are related. This research method might be used to investigate a hypothesis that is difficult to test experimentally.

Experimental Research Methods

Experimental methods  are used to demonstrate causal relationships between variables. In an experiment, the researcher systematically manipulates a variable of interest (known as the independent variable) and measures the effect on another variable (known as the dependent variable).

Unlike correlational studies, which can only be used to determine if there is a relationship between two variables, experimental methods can be used to determine the actual nature of the relationship—whether changes in one variable actually  cause  another to change.

The hypothesis is a critical part of any scientific exploration. It represents what researchers expect to find in a study or experiment. In situations where the hypothesis is unsupported by the research, the research still has value. Such research helps us better understand how different aspects of the natural world relate to one another. It also helps us develop new hypotheses that can then be tested in the future.

Thompson WH, Skau S. On the scope of scientific hypotheses .  R Soc Open Sci . 2023;10(8):230607. doi:10.1098/rsos.230607

Taran S, Adhikari NKJ, Fan E. Falsifiability in medicine: what clinicians can learn from Karl Popper [published correction appears in Intensive Care Med. 2021 Jun 17;:].  Intensive Care Med . 2021;47(9):1054-1056. doi:10.1007/s00134-021-06432-z

Eyler AA. Research Methods for Public Health . 1st ed. Springer Publishing Company; 2020. doi:10.1891/9780826182067.0004

Nosek BA, Errington TM. What is replication ?  PLoS Biol . 2020;18(3):e3000691. doi:10.1371/journal.pbio.3000691

Aggarwal R, Ranganathan P. Study designs: Part 2 - Descriptive studies .  Perspect Clin Res . 2019;10(1):34-36. doi:10.4103/picr.PICR_154_18

Nevid J. Psychology: Concepts and Applications. Wadworth, 2013.

By Kendra Cherry, MSEd Kendra Cherry, MS, is a psychosocial rehabilitation specialist, psychology educator, and author of the "Everything Psychology Book."

Research Hypothesis In Psychology: Types, & Examples

Saul McLeod, PhD

Editor-in-Chief for Simply Psychology

BSc (Hons) Psychology, MRes, PhD, University of Manchester

Saul McLeod, PhD., is a qualified psychology teacher with over 18 years of experience in further and higher education. He has been published in peer-reviewed journals, including the Journal of Clinical Psychology.

Learn about our Editorial Process

Olivia Guy-Evans, MSc

Associate Editor for Simply Psychology

BSc (Hons) Psychology, MSc Psychology of Education

Olivia Guy-Evans is a writer and associate editor for Simply Psychology. She has previously worked in healthcare and educational sectors.

On This Page:

A research hypothesis, in its plural form “hypotheses,” is a specific, testable prediction about the anticipated results of a study, established at its outset. It is a key component of the scientific method .

Hypotheses connect theory to data and guide the research process towards expanding scientific understanding

Some key points about hypotheses:

• A hypothesis expresses an expected pattern or relationship. It connects the variables under investigation.
• It is stated in clear, precise terms before any data collection or analysis occurs. This makes the hypothesis testable.
• A hypothesis must be falsifiable. It should be possible, even if unlikely in practice, to collect data that disconfirms rather than supports the hypothesis.
• Hypotheses guide research. Scientists design studies to explicitly evaluate hypotheses about how nature works.
• For a hypothesis to be valid, it must be testable against empirical evidence. The evidence can then confirm or disprove the testable predictions.
• Hypotheses are informed by background knowledge and observation, but go beyond what is already known to propose an explanation of how or why something occurs.

Predictions typically arise from a thorough knowledge of the research literature, curiosity about real-world problems or implications, and integrating this to advance theory. They build on existing literature while providing new insight.

Types of Research Hypotheses

Alternative hypothesis.

The research hypothesis is often called the alternative or experimental hypothesis in experimental research.

It typically suggests a potential relationship between two key variables: the independent variable, which the researcher manipulates, and the dependent variable, which is measured based on those changes.

The alternative hypothesis states a relationship exists between the two variables being studied (one variable affects the other).

A hypothesis is a testable statement or prediction about the relationship between two or more variables. It is a key component of the scientific method. Some key points about hypotheses:

• Important hypotheses lead to predictions that can be tested empirically. The evidence can then confirm or disprove the testable predictions.

In summary, a hypothesis is a precise, testable statement of what researchers expect to happen in a study and why. Hypotheses connect theory to data and guide the research process towards expanding scientific understanding.

An experimental hypothesis predicts what change(s) will occur in the dependent variable when the independent variable is manipulated.

It states that the results are not due to chance and are significant in supporting the theory being investigated.

The alternative hypothesis can be directional, indicating a specific direction of the effect, or non-directional, suggesting a difference without specifying its nature. It’s what researchers aim to support or demonstrate through their study.

Null Hypothesis

The null hypothesis states no relationship exists between the two variables being studied (one variable does not affect the other). There will be no changes in the dependent variable due to manipulating the independent variable.

It states results are due to chance and are not significant in supporting the idea being investigated.

The null hypothesis, positing no effect or relationship, is a foundational contrast to the research hypothesis in scientific inquiry. It establishes a baseline for statistical testing, promoting objectivity by initiating research from a neutral stance.

Many statistical methods are tailored to test the null hypothesis, determining the likelihood of observed results if no true effect exists.

This dual-hypothesis approach provides clarity, ensuring that research intentions are explicit, and fosters consistency across scientific studies, enhancing the standardization and interpretability of research outcomes.

Nondirectional Hypothesis

A non-directional hypothesis, also known as a two-tailed hypothesis, predicts that there is a difference or relationship between two variables but does not specify the direction of this relationship.

It merely indicates that a change or effect will occur without predicting which group will have higher or lower values.

For example, “There is a difference in performance between Group A and Group B” is a non-directional hypothesis.

Directional Hypothesis

A directional (one-tailed) hypothesis predicts the nature of the effect of the independent variable on the dependent variable. It predicts in which direction the change will take place. (i.e., greater, smaller, less, more)

It specifies whether one variable is greater, lesser, or different from another, rather than just indicating that there’s a difference without specifying its nature.

For example, “Exercise increases weight loss” is a directional hypothesis.

Falsifiability

The Falsification Principle, proposed by Karl Popper , is a way of demarcating science from non-science. It suggests that for a theory or hypothesis to be considered scientific, it must be testable and irrefutable.

Falsifiability emphasizes that scientific claims shouldn’t just be confirmable but should also have the potential to be proven wrong.

It means that there should exist some potential evidence or experiment that could prove the proposition false.

However many confirming instances exist for a theory, it only takes one counter observation to falsify it. For example, the hypothesis that “all swans are white,” can be falsified by observing a black swan.

For Popper, science should attempt to disprove a theory rather than attempt to continually provide evidence to support a research hypothesis.

Can a Hypothesis be Proven?

Hypotheses make probabilistic predictions. They state the expected outcome if a particular relationship exists. However, a study result supporting a hypothesis does not definitively prove it is true.

All studies have limitations. There may be unknown confounding factors or issues that limit the certainty of conclusions. Additional studies may yield different results.

In science, hypotheses can realistically only be supported with some degree of confidence, not proven. The process of science is to incrementally accumulate evidence for and against hypothesized relationships in an ongoing pursuit of better models and explanations that best fit the empirical data. But hypotheses remain open to revision and rejection if that is where the evidence leads.

• Disproving a hypothesis is definitive. Solid disconfirmatory evidence will falsify a hypothesis and require altering or discarding it based on the evidence.
• However, confirming evidence is always open to revision. Other explanations may account for the same results, and additional or contradictory evidence may emerge over time.

We can never 100% prove the alternative hypothesis. Instead, we see if we can disprove, or reject the null hypothesis.

If we reject the null hypothesis, this doesn’t mean that our alternative hypothesis is correct but does support the alternative/experimental hypothesis.

Upon analysis of the results, an alternative hypothesis can be rejected or supported, but it can never be proven to be correct. We must avoid any reference to results proving a theory as this implies 100% certainty, and there is always a chance that evidence may exist which could refute a theory.

How to Write a Hypothesis

• Identify variables . The researcher manipulates the independent variable and the dependent variable is the measured outcome.
• Operationalized the variables being investigated . Operationalization of a hypothesis refers to the process of making the variables physically measurable or testable, e.g. if you are about to study aggression, you might count the number of punches given by participants.
• Decide on a direction for your prediction . If there is evidence in the literature to support a specific effect of the independent variable on the dependent variable, write a directional (one-tailed) hypothesis. If there are limited or ambiguous findings in the literature regarding the effect of the independent variable on the dependent variable, write a non-directional (two-tailed) hypothesis.
• Make it Testable : Ensure your hypothesis can be tested through experimentation or observation. It should be possible to prove it false (principle of falsifiability).
• Clear & concise language . A strong hypothesis is concise (typically one to two sentences long), and formulated using clear and straightforward language, ensuring it’s easily understood and testable.

Consider a hypothesis many teachers might subscribe to: students work better on Monday morning than on Friday afternoon (IV=Day, DV= Standard of work).

Now, if we decide to study this by giving the same group of students a lesson on a Monday morning and a Friday afternoon and then measuring their immediate recall of the material covered in each session, we would end up with the following:

• The alternative hypothesis states that students will recall significantly more information on a Monday morning than on a Friday afternoon.
• The null hypothesis states that there will be no significant difference in the amount recalled on a Monday morning compared to a Friday afternoon. Any difference will be due to chance or confounding factors.

More Examples

• Memory : Participants exposed to classical music during study sessions will recall more items from a list than those who studied in silence.
• Social Psychology : Individuals who frequently engage in social media use will report higher levels of perceived social isolation compared to those who use it infrequently.
• Developmental Psychology : Children who engage in regular imaginative play have better problem-solving skills than those who don’t.
• Clinical Psychology : Cognitive-behavioral therapy will be more effective in reducing symptoms of anxiety over a 6-month period compared to traditional talk therapy.
• Cognitive Psychology : Individuals who multitask between various electronic devices will have shorter attention spans on focused tasks than those who single-task.
• Health Psychology : Patients who practice mindfulness meditation will experience lower levels of chronic pain compared to those who don’t meditate.
• Organizational Psychology : Employees in open-plan offices will report higher levels of stress than those in private offices.
• Behavioral Psychology : Rats rewarded with food after pressing a lever will press it more frequently than rats who receive no reward.

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[ thee -sis ]

He vigorously defended his thesis on the causes of war.

Synonyms: proposal , contention , theory

• a subject for a composition or essay.
• a dissertation on a particular subject in which one has done original research, as one presented by a candidate for a diploma or degree.
• Music. the downward stroke in conducting; downbeat. Compare arsis ( def 1 ) .
• a part of a metrical foot that does not bear the ictus or stress.
• (less commonly) the part of a metrical foot that bears the ictus. Compare arsis ( def 2 ) .
• Philosophy. Hegelian dialectic

/ ˈθiːsɪs /

• a dissertation resulting from original research, esp when submitted by a candidate for a degree or diploma
• a doctrine maintained or promoted in argument
• a subject for a discussion or essay
• an unproved statement, esp one put forward as a premise in an argument
• music the downbeat of a bar, as indicated in conducting
• (in classical prosody) the syllable or part of a metrical foot not receiving the ictus Compare arsis
• philosophy the first stage in the Hegelian dialectic, that is challenged by the antithesis
• The central idea in a piece of writing, sometimes contained in a topic sentence .

Word History and Origins

Origin of thesis 1

Example Sentences

“The Saudis have been proving the thesis of the film — they do in fact have an army,” said Thor Halvorssen, founder and chief executive of the nonprofit Human Rights Foundation, which funded the movie.

It’s a hypothesis that Bush pursued in her master’s thesis, and last year she began attending virtual Goth parties in a final round of field work before defending her doctoral thesis later this year.

While this partnership was planned prior to the coronavirus outbreak, co-founder Jordana Kier said the pandemic instantly proved out the expansion thesis.

They’ve had to defend that thesis for a very, very long time in front of a variety of different customers and different people.

Over the past decade, In-Q-Tel has been one of the most active investors in the commercial space sector, with a broad investment thesis that touches many aspects of the sector.

In “Back Home,” Gil also revisits the nostalgia for the South explored in his Johns Hopkins thesis, “Circle of Stone.”

At least father and son were in alignment on this central thesis: acting “gay”—bad; being thought of as gay—bad.

Her doctoral thesis, says Ramin Takloo at the University of Illinois, was simply outstanding.

Marshall McLuhan long ago argued the now accepted thesis that different mediums have different influences on thinking.

He wrote his Master's thesis on the underrepresentation of young people in Congress.

And indeed for most young men a college thesis is but an exercise for sharpening the wits, rarely dangerous in its later effects.

It will be for the reader to determine whether the main thesis of the book has gained or lost by the new evidence.

But the word thesis, when applied to Systems, does not mean the 'position' of single notes, but of groups of notes.

This conclusion, it need hardly be said, is in entire agreement with the main thesis of the preceding pages.

Sundry outlying Indians, with ammunition to waste, took belly and knee rests and strengthened the thesis to the contrary.

Related Words

• proposition
• supposition

What Is The Plural Of Thesis?

Plural word for  thesis.

The plural form of thesis is theses , pronounced [ thee -seez ]. The plurals of several other singular words that end in -is are also formed in this way, including hypothesis / hypotheses , crisis / crises , and axis / axes . A similar change is made when pluralizing appendix as appendices . 

Irregular plurals that are formed like theses derive directly from their original pluralization in Latin and Greek.

Thesis: A Comprehensive Study on the Effectiveness of Education

Introduction Education is a fundamental right for all citizens of the world and has been recognized as a key factor in the development of societies and nations. In the last few decades, the importance of education has been further reinforced and it is widely accepted as one of the most important indicators of a nation’s growth. The need for quality education is a constant challenge for governments and educational institutions alike, and it is essential to understand what works in order to create effective educational systems. This paper will discuss the current state of research on the effectiveness of education, including the evidence for the impact of different educational practices and approaches.

Literature Review Many studies have been conducted to assess the effectiveness of education. These studies have yielded mixed results, as the success of any educational program depends on a variety of factors, such as the quality of the teaching, the availability of resources, and the students’ individual characteristics. However, some of the most consistent findings suggest that the quality of instruction, the use of appropriate instructional materials, and student-centered approaches are essential for successful education.

In terms of the quality of instruction, research has demonstrated that teachers who are knowledgeable, organized, and passionate about teaching have a positive effect on student performance. Similarly, research has shown that the use of appropriate instructional materials is essential for successful education, as it helps students to understand the content and encourages them to become engaged in the learning process. Finally, student-centered approaches, such as active learning and problem-based learning, have been found to be effective in promoting student engagement and learning outcomes.

Conclusion Overall, this review of the literature suggests that the effectiveness of education depends on a variety of factors, including the quality of instruction, the use of appropriate instructional materials, and student-centered approaches. These findings highlight the need for educational institutions to focus on providing quality instruction, using appropriate instructional materials, and adopting student-centered approaches in order to ensure successful education.

References Gibbs, G., & Simpson, C. (2004). Conditions under which assessment supports students’ learning. Learning and Teaching in Higher Education, 1(1), 3-31.

Kumar, S., & Jain, S. (2015). Quality of instruction and its impact on student learning. International Journal of Educational Research, 66, 42-51.

Liao, Y. C., & Tsai, C. C. (2014). Active learning: An effective approach to promote learning outcomes. Educational Technology & Society, 17(3), 43-55.

National Research Council. (2000). How people learn: Brain, mind, experience, and school. Washington, DC: National Academy Press.

Smith, M. K. (1999). Problem-based learning: A review of the literature on its outcomes and implementation issues. Academic Medicine, 74(3), 537-541.

Related terms

Topo- (top-), touch therapy, trait rating.