In studies with a group of individuals being tested in a series of treatment conditions,factors such as history,instrumentation,and maturation threaten
A)internal validity.
B)external validity.
C)both internal and external validity.
D)neither internal nor external validity.

Question

Quizplus · Accepted Answer

The factors listed (history, instrumentation, and maturation) all have the potential to impact the results obtained in a study, thus threatening the internal validity of the study. External validity, on the other hand, refers to the extent to which the results can be generalized to other populations and settings, and is not directly impacted by these factors.

In Studies with a Group of Individuals Being Tested in a Series