The second AB in the sequence of an ABAB design provides evidence of ____.
A) external validity
B) internal validity
C) reactivity
D) experimenter bias

Question

Quizplus · Accepted Answer

The second AB in an ABAB design (also known as a reversal design) provides evidence of internal validity by demonstrating that the behavior changes back when the intervention is reintroduced, suggesting that the observed changes are due to the intervention itself rather than external factors.

The Second AB in the Sequence of an ABAB Design