Quasi-Experimental Designs Which design's internal validity is most threatened by the possibility of
Practice effects?
A)cross-lagged panel
B)cross-sectional
C)ex post facto
D)pretest/posttest

Question

Quizplus · Accepted Answer

Pretest/posttest designs are most threatened by practice effects because the act of taking the pretest may influence participants' performance on the posttest, leading to inflated or deflated results.

Quasi-Experimental Designs Which Design's Internal Validity Is Most Threatened by the Possibility