![](/olcweb/styles/shared/spacer.gif) | ![How to Design and Evaluate Research in Education Book Cover](/sites/dl/free/0072532491/title/fw_sm.gif) How to Design and Evaluate Research in Education, 5/e Jack R. Fraenkel,
San Francisco State University Norman E. Wallen,
San Francisco State University
Causal-Comparative Research
Causal-comparative research | Research to determine the cause for, or consequences of, existing differences in groups of individuals; also referred to as ex post facto research.
| ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Correlational research | Research that involves collecting data in order to determine the degree to which a relationship exists between two or more variables.
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