The question of internal validity refers to
A)the comparison of the results obtained for the experimental group with those obtained for the control group.
B)whether the experimental stimulus really affected the dependent variable.
C)the determination of the proper time to do the posttest.
D)the determination of the proper time to do the pretest.
E)generalizability.

Question

Quizplus · Accepted Answer

Internal validity refers to the extent to which the experimental manipulation of an independent variable really has caused a change in the dependent variable. In other words, it is the extent to which we can be confident that the experimental manipulation caused the observed effect on the dependent variable, rather than some other confounding variable.

The Question of Internal Validity Refers to