What factors influence people's behaviors and thoughts? Experimental psychology utilizes scientific methods to answer these questions by researching the mind and behavior. Experimental psychologists conduct experiments to learn more about why people do certain things.
Overview of Experimental Psychology
Why do people do the things they do? What factors influence how personality develops? And how do our behaviors and experiences shape our character?
These are just a few of the questions that psychologists explore, and experimental methods allow researchers to create and empirically test hypotheses. By studying such questions, researchers can also develop theories that enable them to describe, explain, predict, and even change human behaviors.
For example, researchers might utilize experimental methods to investigate why people engage in unhealthy behaviors. By learning more about the underlying reasons why these behaviors occur, researchers can then search for effective ways to help people avoid such actions or replace unhealthy choices with more beneficial ones.
Why Experimental Psychology Matters
While students are often required to take experimental psychology courses during undergraduate and graduate school, think about this subject as a methodology rather than a singular area within psychology. People in many subfields of psychology use these techniques to conduct research on everything from childhood development to social issues.
Experimental psychology is important because the findings play a vital role in our understanding of the human mind and behavior.
By better understanding exactly what makes people tick, psychologists and other mental health professionals can explore new approaches to treating psychological distress and mental illness. These are often topics of experimental psychology research.
Experimental Psychology Methods
So how exactly do researchers investigate the human mind and behavior? Because the mind is so complex, it seems like a challenging task to explore the many factors that contribute to how we think, act, and feel.
Experimental psychologists use a variety of different research methods and tools to investigate human behavior. Methods in the experimental psychology category include experiments, case studies, correlational research, and naturalistic observations.
Major Branches of Psychology
Experimentation remains the primary standard in psychological research. In some cases, psychologists can perform experiments to determine if there is a cause-and-effect relationship between different variables.
The basics of conducting a psychology experiment involve:
- Randomly assigning participants to groups
- Operationally defining variables
- Developing a hypothesis
- Manipulating independent variables
- Measuring dependent variables
One experimental psychology research example would be to perform a study to look at whether sleep deprivation impairs performance on a driving test. The experimenter could control other variables that might influence the outcome, varying the amount of sleep participants get the night before.
All of the participants would then take the same driving test via a simulator or on a controlled course. By analyzing the results, researchers can determine if changes in the independent variable (amount of sleep) led to differences in the dependent variable (performance on a driving test).
Case studies allow researchers to study an individual or group of people in great depth. When performing a case study, the researcher collects every single piece of data possible, often observing the person or group over a period of time and in a variety of situations. They also collect detailed information about their subject's background—including family history, education, work, and social life—is also collected.
Such studies are often performed in instances where experimentation is not possible. For example, a scientist might conduct a case study when the person of interest has had a unique or rare experience that could not be replicated in a lab.
Correlational studies are an experimental psychology method that makes it possible for researchers to look at relationships between different variables. For example, a psychologist might note that as one variable increases, another tends to decrease.
While such studies can look at relationships, they cannot be used to imply causal relationships. The golden rule is that correlation does not equal causation.
Naturalistic observation gives researchers the opportunity to watch people in their natural environments. This experimental psychology method can be particularly useful in cases where the investigators believe that a lab setting might have an undue influence on participant behaviors.
What Experimental Psychologists Do
Experimental psychologists work in a wide variety of settings, including colleges, universities, research centers, government, and private businesses. Some of these professionals teach experimental methods to students while others conduct research on cognitive processes, animal behavior, neuroscience, personality, and other subject areas.
Those who work in academic settings often teach psychology courses in addition to performing research and publishing their findings in professional journals. Other experimental psychologists work with businesses to discover ways to make employees more productive or to create a safer workplace—a specialty area known as human factors psychology.
Experimental Psychology Research Examples
Some topics that might be explored in experimental psychology research include how music affects motivation, the impact social media has on mental health, and whether a certain color changes one's thoughts or perceptions.
A to Z List of Psychology Careers
History of Experimental Psychology
To understand how experimental psychology got where it is today, it can be helpful to look at how it originated. Psychology is a relatively young discipline, emerging in the late 1800s. While it started as part of philosophy and biology, it officially became its own field of study when early psychologist Wilhelm Wundt founded the first laboratory devoted to the study of experimental psychology.
Some of the important events that helped shape the field of experimental psychology include:
- 1874 - Wilhelm Wundt published the first experimental psychology textbook, "Grundzüge der physiologischen Psychologie" ("Principles of Physiological Psychology").
- 1875 - William James opened a psychology lab in the United States. The lab was created for the purpose of class demonstrations rather than to perform original experimental research.
- 1879 - The first experimental psychology lab was founded in Leipzig, Germany. Modern experimental psychology dates back to the establishment of the very first psychology lab by pioneering psychologist Wilhelm Wundt during the late nineteenth century.
- 1883 - G. Stanley Hall opened the first experimental psychology lab in the United States at John Hopkins University.
- 1885 - Herman Ebbinghaus published his famous "Über das Gedächtnis" ("On Memory"), which was later translated to English as "Memory: A Contribution to Experimental Psychology." In the work, Ebbinghaus described learning and memory experiments that he conducted on himself.
- 1887 - George Truball Ladd published his textbook "Elements of Physiological Psychology," the first American book to include a significant amount of information on experimental psychology.
- 1887 - James McKeen Cattell established the world's third experimental psychology lab at the University of Pennsylvania.
- 1890 - William James published his classic textbook, "The Principles of Psychology."
- 1891 - Mary Whiton Calkins established an experimental psychology lab at Wellesley College, becoming the first woman to form a psychology lab.
- 1893 - G. Stanley Hall founded the American Psychological Association, the largest professional and scientific organization of psychologists in the United States.
- 1920 - John B. Watson and Rosalie Rayner conducted their now-famous Little Albert Experiment, in which they demonstrated that emotional reactions could be classically conditioned in people.
- 1929 - Edwin Boring's book "A History of Experimental Psychology" was published. Boring was an influential experimental psychologist who was devoted to the use of experimental methods in psychology research.
- 1955 - Lee Cronbach published "Construct Validity in Psychological Tests," which popularized the use of construct validity in psychological studies.
- 1958 - Harry Harlow published "The Nature of Love," which described his experiments with rhesus monkeys on attachment and love.
- 1961 - Albert Bandura conducted his famous Bobo doll experiment, which demonstrated the effects of observation on aggressive behavior.
Experimental Psychology Uses
While experimental psychology is sometimes thought of as a separate branch or subfield of psychology, experimental methods are widely used throughout all areas of psychology.
- Developmental psychologists use experimental methods to study how people grow through childhood and over the course of a lifetime.
- Social psychologists use experimental techniques to study how people are influenced by groups.
- Health psychologists rely on experimentation and research to better understand the factors that contribute to wellness and disease.
A Word From Verywell
The experimental method in psychology helps us learn more about how people think and why they behave the way they do. Experimental psychologists can research a variety of topics using many different experimental methods. Each one contributes to what we know about the mind and human behavior.
Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
Shaughnessy JJ, Zechmeister EB, Zechmeister JS. Research Methods in Psychology. McGraw-Hill.(Video) Experimental Methods || Methods of Psychology || Part-3 || Dr. Veena
Heale R, Twycross A. What is a case study?. Evid Based Nurs. 2018;21(1):7-8. doi:10.1136/eb-2017-102845
Chiang IA, Jhangiani RS, Price PC.Correlational research. In: Research Methods in Psychology, 2nd Canadian edition. BCcampus Open Education.
Pierce T.Naturalistic observation. Radford University.
Kantowitz BH, Roediger HL, Elmes DG. Experimental Psychology. Cengage Learning.
Weiner IB, Healy AF, Proctor RW. Handbook of Psychology: Volume 4, Experimental Psychology. John Wiley & Sons.
By Kendra Cherry
Kendra Cherry, MS, is an author and educational consultant focused on helping students learn about psychology.
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This is the most objective way of studying the behaviour. In this method, experiments are conducted in the laboratories under controlled conditions. In experiments, usually the effect of independent variable on the dependent variable is studied.
They study a wide range of behavioral topics among humans and animals, including sensation, perception, attention, memory, cognition and emotion.How do psychologists study human behavior? ›
Experimental psychologists use a variety of different research methods and tools to investigate human behavior. Methods in the experimental psychology category include experiments, case studies, correlational research, and naturalistic observations.Why is the experimental method preferred in psychology? ›
The experimental method is often preferred in research on behavior because a properly designed experiment can allow cause and effect conclusions to be made. Many studies in social psychology are experiments. These types of studies can be done in a laboratory setting or in a natural setting.What are the characteristics of experimental psychology? ›
However, experimental psychology features at least three central components that define it: empiricism, falsifiability, and determinism. These features are central to experimental psychology but also many other fields within science. Empiricism refers to the collection of data that can support or refute a theory.Who developed the experimental approach to studying behavior? ›
Experimental psychology emerged as a modern academic discipline in the 19th century when Wilhelm Wundt introduced a mathematical and experimental approach to the field. Wundt founded the first psychology laboratory in Leipzig, Germany.Which of the following is the focus of experimental psychology? ›
Research is the focus of experimental psychology. Using scientific methods to collect data and perform research, experimental psychology focuses on certain questions, and, one study at a time, reveals information that contributes to larger findings or a conclusion.How does psychology experiment demonstrate a cause and effect relationship between antecedent conditions and behavior? ›
How does a psychology experiment demonstrate a cause and effect relationship between antecedent conditions and behavior? A psychology experiment demonstrates a cause and effect relationship between antecedent conditions and behavior by measuring their behaviors and comparing them to the hypothesis.Why do we study behavior in psychology? ›
Strongly rooted in psychology and sociology, studies of human behavior give us an academic understanding of motivations, productivity, and how teams work. In turn, these insights can help make workplaces or any group setting more productive.What is experimental method example? ›
The researcher decides where the experiment will take place, at what time, with which participants, in what circumstances and using a standardized procedure. Participants are randomly allocated to each independent variable group. An example is Milgram's experiment on obedience or Loftus and Palmer's car crash study.
- Determine your research objective. Understand the objective and goals of your research. ...
- Determine questions and create a research guide. ...
- Establish your method of gathering data. ...
- Observe. ...
- Prepare your data. ...
- Analyze behaviors in your data.
Experimental research seeks to determine a relationship between two (2) variables—the dependent variable and the independent variable. After completing an experimental research study, a correlation between a specific aspect of an entity and the variable being studied is either supported or rejected.How do you gather data in an experimental study? ›
There are four major ways to collect data: surveys, observation, computer simulation and experiment.What is a major advantage of the experimental method? ›
Experimental research allows cause and effect to be determined. The manipulation of variables allows for researchers to be able to look at various cause-and-effect relationships that a product, theory, or idea can produce.What is the main characteristic of the experimental method? ›
Experimental designs, also called randomized experiments, are characterized by two distinguishing features: (i) the conscious manipulation by the researcher of a treatment or, more generically, an independent variable of interest, and (ii) the random assignment of units to treatment and control groups (Fig. 4).What are the main advantage and disadvantage of experimental method? ›
The advantages and disadvantages of experimental research show that it is a useful system to use, but it must be tightly controlled in order to be beneficial. It produces results that can be replicated, but it can also be easily influenced by internal or external influences that may alter the outcomes being achieved.How does an experiment work? ›
Experiments are used to study causal relationships. You manipulate one or more independent variables and measure their effect on one or more dependent variables. Experimental design means creating a set of procedures to systematically test a hypothesis.What is experimental method example? ›
The researcher decides where the experiment will take place, at what time, with which participants, in what circumstances and using a standardized procedure. Participants are randomly allocated to each independent variable group. An example is Milgram's experiment on obedience or Loftus and Palmer's car crash study.How do you do experimental research? ›
- State the hypothesis to be tested. ...
- Formulate a context. ...
- Formulate a theoretical model. ...
- Design the experiment. ...
- Construct the experiment.
- Test the experimental apparatus. ...
- Perform preliminary experiments. ...
- Perform the experiment.
Experimental teaching can be defined as a process that includes a procedure carried out to support laid down assumptions. The procedures entail hands-on activities that engage and motivate students to learn in the science classroom (Doherty, 2011; Safaruddin et al., 2020).
There are four major ways to collect data: surveys, observation, computer simulation and experiment.What is the main purpose of experimental research? ›
Experimental research seeks to determine a relationship between two (2) variables—the dependent variable and the independent variable. After completing an experimental research study, a correlation between a specific aspect of an entity and the variable being studied is either supported or rejected.Why is experimental method important? ›
An advantage of the experimental method of functional assessment is its validity. That is, because it involves testing of each variable posited to maintain behavior in a relatively controlled setting, it is the most reliable way of determining behavioral function.What is the main characteristic of the experimental method? ›
Experimental designs, also called randomized experiments, are characterized by two distinguishing features: (i) the conscious manipulation by the researcher of a treatment or, more generically, an independent variable of interest, and (ii) the random assignment of units to treatment and control groups (Fig. 4).Where is experimental research used? ›
Experimental Research is often used where: There is time priority in a causal relationship (cause precedes effect) There is consistency in a causal relationship (a cause will always lead to the same effect) The magnitude of the correlation is great.What are the 3 characteristics of experimental research? ›
True experiments have four elements: manipulation, control , random assignment, and random selection. The most important of these elements are manipulation and control. Manipulation means that something is purposefully changed by the researcher in the environment.What are the strengths and weaknesses of the experimental method? ›
|Tighter control of variables. Easier to comment on cause and effect.||Demand characteristics - participants aware of experiment, may change behaviour.|
|Relatively easy to replicate.||Artificial environment - low realism.|
Probability sampling or random selection of participants from the population of interest is used in experimental designs. Non-probability sampling is used in observational studies where study participants are not chosen at random but outcomes are available for retrospective or prospective analysis.What type of data are collected in experimental research? ›
Experimental data are collected through active intervention by the researcher to produce and measure change or to create difference when a variable is altered. Experimental data typically allows the researcher to determine a causal relationship and is typically projectable to a larger population.How many samples are in an experimental study? ›
The minimum sample size, according to Central Limit Theorem, must be 30. Of course, depending on sample's limits and characteristics the sample should be bigger than 40. And it is obvious that the bigger the sample is, the better for the research.