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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
- Concepts and Terms
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