Research Methodology · Experimental Research Threats
Which of the following factors primarily threatens the external validity (generalizability) of an experiment rather than its internal validity?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Experimental mortality or differential attrition
- 2Interaction effect of testing or pre-testing✓
- 3Selection bias during group assignment
- 4Maturation of participants over time
Correct answer
Interaction effect of testing or pre-testing
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