Research Methodology · Research Aptitude
When participants drop out of a study over time, leading to a change in the characteristics and composition of the sample, it causes which of the following threats to internal validity?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Testing threat
- 2History threat
- 3Attrition threat✓
- 4Selection threat
Correct answer
Attrition threat
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