_____ 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) A carryover effect
B) A practice effect
C) History
D) An order effect

Question

Quizplus · Accepted Answer

An order effect, sometimes called a sequencing effect or position effect, can occur in a within-subjects design when the order in which conditions are presented affects the outcome variable. For example, if a participant receives condition A before condition B, their performance on condition B may be influenced by their experience with condition A. This can pose a threat to internal validity if it is unclear whether the observed effects are due to the manipulation or the order in which conditions were presented.

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