Differential history effects are a threat to internal validity for which of the following designs?
A)differential research design
B)one-group pretest-posttest design
C)pretest-posttest nonequivalent control group design
D)longitudinal design

Question

Differential history effects are a threat to internal validity for which of the following designs?
A)​differential research design
B)​one-group pretest-posttest design
C)pretest-posttest nonequivalent control group design
D)​longitudinal design

Quizplus · Accepted Answer

Differential history effects occur when changes over time affect the treatment group differently than the control group in a pretest-posttest nonequivalent control group design. This is because the groups are not randomly assigned and thus other variables may affect the treatment group differently than the control group.

Differential History Effects Are a Threat to Internal Validity for Which