Which of the following is NOT one of the threats to the external validity of experiments discussed in the text
A)unrepresentative samples
B)reactive effects of testing
C)statistical regression
D)multiple treatment interference

Question

Quizplus · Accepted Answer

Statistical regression is not a threat to external validity but rather to internal validity. It refers to the phenomenon where extreme scores on a variable tend to move toward the mean upon retesting. External validity concerns the extent to which the results of a study can be generalized to other situations and to other people.

Which of the Following Is NOT One of the Threats