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Types of Research Studies

Learn more about some of the different research methods that can be used in psychology, including cross-sectional, correlational, longitudinal and experimental designs.

The Simple Experiment
The simple experiment is one of the most basic methods of determining if there is a cause-and-effect relationship between two variables. Find more information on the parts of a simple experiment and how results are measured.

Correlational Studies
Correlational studies are one of the two major types of psychology research. Learn more about the subtypes of correlational studies as well as methods of observation and scientific surveys.

What Is Longitudinal Research?
Longitudinal research involves conducting a study over a period of time, sometimes for months or even years.

What Is a Cross-Sectional Study?
Cross-sectional research is a type of research method often used in developmental psychology, but also utilized in many other areas including social science, education and other branches of science...

What Is a Survey?
Surveys are an important data collection tool often used in psychology research. Surveys have the benefit of being easy and relatively inexpensive to administer.

Case Study
A case study is a type of research than involves closely following one individual or group of people. This type of research is often used in situations where researchers are observing something fairly rare or difficult to replicate in a lab setting.

What Is a Within-Subjects Design?
In a within-subjects design, all subjects are exposed to every experimental condition or treatment.

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