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hypothesize

Definition of hypothesize

intransitive verb

transitive verb

• hypothecate

Examples of hypothesize in a Sentence

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hypothesize.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

1738, in the meaning defined at intransitive sense

Dictionary Entries Near hypothesize

hypothetical

Cite this Entry

“Hypothesize.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/hypothesize. Accessed 15 May. 2024.

Kids Definition

Kids definition of hypothesize, more from merriam-webster on hypothesize.

Britannica English: Translation of hypothesize for Arabic Speakers

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hypothesize

[ hahy- poth - uh -sahyz , hi- ]

verb (used with object)

Given these data, we can hypothesize that the rise in truck accidents is directly related to the stressful work environment and unsafe driving practices of drivers.

He said little, but based on his body language and tone, I hypothesized that he had feelings for her.

verb (used without object)

She has written several well-researched papers hypothesizing about the origins of language.

I like to hypothesize about life in the next century.

/ haɪˈpɒθɪˌsaɪz /

• to form or assume as a hypothesis

/ hī-pŏth ′ ĭ-sīz′ /

• To form a hypothesis.

Discover More

Derived forms.

• hyˈpotheˌsizer , noun

Other Words From

• hy·poth·e·siz·er noun

Word History and Origins

Origin of hypothesize 1

Example Sentences

Across a range of ecosystems and animals, he says, the researchers were seeing wildlife corridors divided by hotspots for human-animal conflict, which they hypothesized would create barriers to movement, functionally cutting off the corridor.

The hypothesized nonmaterial vital essence, especially in human beings, has sometimes been called “spirit.”

Competition between humans and wolves for prey would have declined as generations of pet wolves gradually evolved into dogs, the team hypothesizes.

In any case, it seems we need more evidence, from experiments in both humans and non-human model organisms, to see if the ideas that Quiroga hypothesizes are true.

Based on some previous findings, they hypothesized that the subjects would prefer the heavier load with fewer reps.

Experts hypothesize the painting represents the “conquest dance,” a Christian conversion ritual still performed to this day.

Historians hypothesize that the fruit in the Garden of Eden was a pomegranate, not an apple.

One might hypothesize the maid was part of a scam to shake down any rich old man in a luxury suite.

One can hypothesize that the bad decision came after the consumption of stupefying substances.

Can it, as researchers hypothesize, cure our jet lag and help us get pregnant?

We can, I repeat, thus hypothesize so long as we see no impossibility.

Consequently, we hypothesize the independent development of these dermal changes in S. baudini and phaeota.

Still, we can hypothesize, even if we cannot prove and establish.

• 1.1 Etymology
• 1.2 Pronunciation
• 1.3.1 Synonyms
• 1.3.2 Derived terms
• 1.3.3 Translations
• 2.1 Etymology
• 2.2 Pronunciation
• 2.3.1 Declension

English [ edit ]

Etymology [ edit ].

Recorded since 1596, from Middle French hypothese , from Late Latin hypothesis , from Ancient Greek ὑπόθεσις ( hupóthesis , “ base, basis of an argument, supposition ” , literally “ a placing under ” ) , itself from ὑποτίθημι ( hupotíthēmi , “ I set before, suggest ” ) , from ὑπό ( hupó , “ below ” ) + τίθημι ( títhēmi , “ I put, place ” ) .

Pronunciation [ edit ]

• ( UK ) IPA ( key ) : /haɪˈpɒθɪsɪs/ , /hɪˈpɒθɪsɪs/ , /həˈpɒθɪsɪs/ , /-əsəs/ , /-əsɪs/
• ( US ) IPA ( key ) : /haɪˈpɑː.θə.sɪs/

Noun [ edit ]

hypothesis ( plural hypotheses )

• 2001 September 27, Terrie E. Moffitt, Avshalom Caspi, Michael Rutter, Phil A. Silva, Sex Differences in Antisocial Behaviour: Conduct Disorder, Delinquency, and Violence in the Dunedin Longitudinal Study ‎ [1] , Cambridge University Press , →ISBN , page 151 : This hypothesis goes by many names, including group resistence, the threshold effect, and the gender paradox. Because the hypothesis holds such wide appeal, it is worth revisiting the logic behind it. The hypothesis is built on the factual observation that fewer females than males act antisocially.
• 2005 , Ronald H. Pine, http://www.csicop.org/specialarticles/show/intelligent_design_or_no_model_creationism , 15 October 2005: Far too many of us have been taught in school that a scientist, in the course of trying to figure something out, will first come up with a " hypothesis " (a guess or surmise—not necessarily even an "educated" guess). ... [But t]he word " hypothesis " should be used, in science, exclusively for a reasoned, sensible, knowledge-informed explanation for why some phenomenon exists or occurs. An hypothesis can be as yet untested; can have already been tested; may have been falsified; may have not yet been falsified, although tested; or may have been tested in a myriad of ways countless times without being falsified; and it may come to be universally accepted by the scientific community. An understanding of the word " hypothesis ," as used in science, requires a grasp of the principles underlying Occam's Razor and Karl Popper's thought in regard to " falsifiability "—including the notion that any respectable scientific hypothesis must, in principle, be "capable of" being proven wrong (if it should, in fact, just happen to be wrong), but none can ever be proved to be true. One aspect of a proper understanding of the word " hypothesis ," as used in science, is that only a vanishingly small percentage of hypotheses could ever potentially become a theory.
• ( general ) An assumption taken to be true for the purpose of argument or investigation .
• ( grammar ) The antecedent of a conditional statement .

Synonyms [ edit ]

• supposition
• educated guess
• See also Thesaurus:supposition

Derived terms [ edit ]

• alternative hypothesis
• aquatic ape hypothesis
• Avogadro's hypothesis
• conspiracy hypothesis
• continuum hypothesis
• cosmic censorship hypothesis
• documentary hypothesis
• efficient market hypothesis
• ergodic hypothesis
• expectations hypothesis
• Fisher hypothesis
• Gaia hypothesis
• generalized continuum hypothesis
• God hypothesis
• Griesbach hypothesis
• hypothesize
• hypothetical
• hypothetically
• interface hypothesis
• just-world hypothesis
• level-ordering hypothesis
• mafia hypothesis
• Medea hypothesis
• Monro-Kellie hypothesis
• null hypothesis
• Omphalos hypothesis
• Out of India hypothesis
• ovulatory shift hypothesis
• permanent income hypothesis
• Prout's hypothesis
• Rare Earth hypothesis
• Red Queen hypothesis
• Riemann hypothesis
• Sapir-Whorf hypothesis
• Schinzel's hypothesis H
• sexy son hypothesis
• simulation hypothesis
• swoon hypothesis
• trickle-down hypothesis
• trickle down hypothesis
• Wellhausen's hypothesis
• working hypothesis
• zombie hypothesis

Translations [ edit ]

Latin [ edit ].

Borrowed from Ancient Greek ὑπόθεσις ( hupóthesis , “ hypothesis ” , noun ) .

• ( Classical ) IPA ( key ) : /hyˈpo.tʰe.sis/ , [hʏˈpɔt̪ʰɛs̠ɪs̠]
• ( modern Italianate Ecclesiastical ) IPA ( key ) : /iˈpo.te.sis/ , [iˈpɔːt̪es̬is]

hypothesis   f ( genitive hypothesis or hypotheseōs or hypothesios ) ; third declension

Declension [ edit ]

1 Found sometimes in Medieval and New Latin.

• There is also genitive plural hypotheseōn .
• The genitive singular is also spelled hypotheseωs and the genitive plural hypotheseωn .

• English terms derived from Proto-Indo-European
• English terms derived from the Proto-Indo-European root *dʰeh₁-
• English terms borrowed from Middle French
• English terms derived from Middle French
• English terms derived from Late Latin
• English terms derived from Ancient Greek
• English 4-syllable words
• English terms with IPA pronunciation
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• Latin terms derived from Ancient Greek
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How to Write a Great Hypothesis

Hypothesis Definition, Format, Examples, and Tips

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

Amy Morin, LCSW, is a psychotherapist and international bestselling author. Her books, including "13 Things Mentally Strong People Don't Do," have been translated into more than 40 languages. Her TEDx talk,  "The Secret of Becoming Mentally Strong," is one of the most viewed talks of all time.

Verywell / Alex Dos Diaz

• The Scientific Method

Hypothesis Format

Falsifiability of a hypothesis.

• Operationalization

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."

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Definition of hypothesis noun from the Oxford Advanced American Dictionary

• formulate/advance a theory/hypothesis
• build/construct/create/develop a simple/theoretical/mathematical model
• develop/establish/provide/use a theoretical/conceptual framework/an algorithm
• advance/argue/develop the thesis that…
• explore an idea/a concept/a hypothesis
• make a prediction/an inference
• base a prediction/your calculations on something
• investigate/evaluate/accept/challenge/reject a theory/hypothesis/model
• design an experiment/a questionnaire/a study/a test
• do research/an experiment/an analysis
• make observations/calculations
• take/record measurements
• carry out/conduct/perform an experiment/a test/a longitudinal study/observations/clinical trials
• run an experiment/a simulation/clinical trials
• repeat an experiment/a test/an analysis
• replicate a study/the results/the findings
• observe/study/examine/investigate/assess a pattern/a process/a behavior
• fund/support the research/project/study
• seek/provide/get/secure funding for research
• collect/gather/extract data/information
• yield data/evidence/similar findings/the same results
• analyze/examine the data/soil samples/a specimen
• consider/compare/interpret the results/findings
• fit the data/model
• confirm/support/verify a prediction/a hypothesis/the results/the findings
• prove a conjecture/hypothesis/theorem
• draw/make/reach the same conclusions
• read/review the records/literature
• describe/report an experiment/a study
• present/publish/summarize the results/findings
• present/publish/read/review/cite a paper in a scientific journal

Questions about grammar and vocabulary?

Find the answers with Practical English Usage online, your indispensable guide to problems in English.

• 2 [ uncountable ] guesses and ideas that are not based on certain knowledge synonym speculation It would be pointless to engage in hypothesis before we have the facts.

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Phrasal verbs and multi-word verbs

Multi-word verbs are verbs which consist of a verb and one or two particles or prepositions (e.g. up, over, in, down ). There are three types of multi-word verbs: phrasal verbs, prepositional verbs and phrasal-prepositional verbs. Sometimes, the name ‘phrasal verb’ is used to refer to all three types.

Phrasal verbs

Phrasal verbs have two parts: a main verb and an adverb particle.

The most common adverb particles used to form phrasal verbs are around , at, away, down, in, off , on, out, over, round, up :

bring in go around look up put away take off

Phrasal verbs often have meanings which we cannot easily guess from their individual parts. (The meanings are in brackets.)

The book first came out in 1997. (was published)

The plane took off an hour late. (flew into the air)

The lecture went on till 6.30. (continued)

It’s difficult to make out what she’s saying. (hear/understand)

For a complete list of the most common phrasal verbs, see the Cambridge International Dictionary of Phrasal Verbs .

Phrasal verbs are often, but not always, less formal than a single word with the same meaning.

Phrasal verbs and objects

Many phrasal verbs take an object. In most cases, the particle may come before or after the object if the object is not a personal pronoun ( me, you, him, us , etc.).

If the object is a personal pronoun ( me, you, him, us , etc.), we always put the pronoun before the particle:

I’ve made some copies. Would you like me to hand them out ?

Not: Would you like me to hand out them?

Oh, I can’t lift you up any more. You’re too big now!

Not: I can’t lift up you any more .

We usually put longer objects (underlined) after the particle:

Many couples do not want to take on the responsibility of bringing up a large family of three or four children .

We can use some phrasal verbs without an object:

The taxi broke down on the way to the airport and I thought I nearly missed my flight.

We’d better set off before the rush-hour traffic starts.

What time did you wake up this morning?

A good learner’s dictionary will tell you if the phrasal verb needs an object or can be used without one.

Prepositional verbs

Prepositional verbs have two parts: a verb and a preposition which cannot be separated from each other:

Prepositional verbs and objects

Prepositional verbs always have an object, which comes immediately after the preposition. The object (underlined) can be a noun phrase, a pronoun or the -ing form of a verb:

Somebody broke into his car and stole his radio.

I don’t like this CD. I don’t want to listen to it any more.

Getting to the final depends on winning the semi-final !

Some prepositional verbs take a direct object after the verb followed by the prepositional phrase.

(do = direct object; po = object of preposition [both underlined])

Hannah reminds [DO] me of [PO] a girlfriend of mine.

How can we protect [DO] children from [PO] dangerous material on the Internet ?

I’d like to thank [DO] everyone for [PO] their kindness .

Prepositional verbs or phrasal verbs?

Not all phrasal verbs need an object. Prepositional verbs (e.g. listen to, depend on ) always have an object after the preposition:

I’ve got a great new CD. Shall we listen to it ?

Not: Shall we listen to?

With phrasal verbs the object can come before or after the particle if the object is not a pronoun. With prepositional verbs, the object is always immediately after the preposition.(Objects are underlined.)

Phrasal-prepositional verbs

Phrasal-prepositional verbs have three parts: a verb, a particle and a preposition. The particle and the preposition cannot be separated. Many of these verbs are often used in informal contexts, and their meaning is difficult to guess from their individual parts.

Ken’s just chatting to a friend. He’ll catch up with us in a minute. (reach, join)

Do you get on with your neighbours? (have a good relationship with)

We look forward to meeting you on the 22nd. (anticipate with pleasure)

Look forward to

Phrasal-prepositional verbs and objects

The object (underlined below) always comes immediately after the preposition, and not in any other position:

She was a wonderful teacher. We all looked up to her . (respected)

Not: We all looked her up to . or We all looked up her to .

Some phrasal-prepositional verbs also take a direct object after the verb as well as an object of the preposition:

She fixed [DO] us up with [PO] a violin teacher . We’re really grateful to her. ( fixed us up with = arranged for us)

We just put [DO] the accident down to [PO] bad luck ; there’s no other reason. ( put down to = think the cause or reason is)

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