Research Methodology · Research Aptitude
Identify from the list below the threats to internal validity of research. (A) Interaction of selection and independent variable (X) (B) Statistical regression (C) Interaction of pretesting and X (D) Differential selection of subjects (E) Experimental mortality Choose the correct answer from the options given below:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(C), (D) and (E) only
- 2(B), (C) and (D) only
- 3(A), (B) and (C) only
- 4(B), (D) and (E) only✓
Correct answer
(B), (D) and (E) only
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