A Major Difference Between Experimental Research and Ex Post Facto

question 11

Multiple Choice

A major difference between experimental research and ex post facto research is that

• A) in experimental research there are two or more groups of subjects to be compared, while in ex post facto research one group of subjects is being studied.
• B) a test of significance is applied to the data collected in an experiment, while descriptive-type statistics are used to analyze data collected in an ex post facto research.
• C) in experimental research the researcher is always testing a hypothesis, while in ex post facto research hypothesis testing is not involved.
• D) in experimental research manipulation of variables is possible, while in ex post facto it is not possible to manipulate the variables.