psychological research methods

A very wide range of research methods are used in psychology. Some of the approaches include:

Laboratory experimentation
Correlational research
Observational study, in which researchers study a population while attempting to change as little as possible.
Experimental study, in which researchers change a variable in the group being studied.
Psychometrics
Prospective study, in which a study samples subjects as the experiment progresses. Cf. Retrospective study.
Retrospective study, in which data is collected on subjects' histories at one time. Cf. Prospective study.
Longitudinal study, in which subjects are studied over a course of time. Cf. Cross-sectional study.
Cross-sectional study, in which a snapshot of the population is assumed to represent individuals as they progress through life. See also Longitudinal study.
Meta analysis
Qualitative research
Computer simulation

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