List of psychological research methods

A wide range of research methods are used in psychology.

Most methods gather either qualitative data, quantitative data or both. Here are the main research methods:
 * Laboratory experiment
 * Field experiment
 * Quasi experiment
 * Correlational
 * Observation, can be naturalistic, participant or controlled.
 * Case study
 * Interview, can be structured or unstructured.
 * Statistical survey
 * 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
 * Content analysis