_____ is a threat to internal validity in a within-subjects design resulting from the influence that the sequence of experiment conditions can have on the dependent variable.
A) Instrumentation
B) Maturation
C) History
D) An order effect

Question

Quizplus · Accepted Answer

An order effect occurs in within-subjects designs when the sequence in which the experimental conditions are presented affects the outcome on the dependent variable. This can happen because participants may get better with practice (practice effects) or get worse due to fatigue (fatigue effects), among other reasons.

_____ Is a Threat to Internal Validity in a Within-Subjects