Stanley conducts a study in which he assesses teasing in a sample of first-graders during the first week of school and again three months later. Because the study is longitudinal, Stanley has to worry about which of the following threats to internal validity?
A) Selection
B) Temporal generalization
C) Demand characteristics
D) Maturation

Question

Quizplus · Accepted Answer

Maturation refers to the natural changes that occur in participants over time, which can affect the results of a longitudinal study like Stanley's.

Stanley Conducts a Study in Which He Assesses Teasing in a Sample