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1) What steps would you take to avoid the post hoc fallacy in your ex post facto research? 2) Try to control any relevant extraneous variables that could affect the measured variable

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1) What steps would you take to avoid the post hoc fallacy in your ex post facto research?

2) Try to control any relevant extraneous variables that could affect the measured variable. Methods of control include (a) matching, (b) using homogeneous groups, (c) building extraneous variables into the design, and (d) using ANCOVA or other statistical means to partially control unwanted variables