A researcher administers an antidepressant drug to a group of depressed patients and over a period of time they improve. The researcher claims that their improvement is due to
The drug, even though she did not control for outside factors such as improved emotional
Support from friends, or natural improvement over time. This study lacks ______.
A) analogue validity
B) construct validity
C) internal validity
D) external validity

Question

Quizplus · Accepted Answer

The study lacks internal validity as it did not control for outside factors that could have influenced the observed improvement in the patients. Analog validity refers to the extent to which the study findings can be generalized to real-world situations, construct validity refers to the consistency between the study variables and the theoretical constructs they are supposed to represent, and external validity refers to the extent to which the findings can be generalized to other populations or settings.

A Researcher Administers an Antidepressant Drug to a Group of Depressed