During the course of an experimental that lasts over a period of time, normal developmental changes may occur that can affect the results of the study independent of the treatment program being evaluated. This threat to internal validity is called
A)history
B)regression
C)testing
D)maturation

Question

Quizplus · Accepted Answer

Maturation refers to the natural developmental changes that occur over time, which can affect the results of a study independently of the treatment being evaluated.

During the Course of an Experimental That Lasts Over a Period