Controlling Within-Subjects Designs Which of these extraneous variables could confound a within-subjects design?
A)ethnicity
B)fatigue
C)gender
D)intelligence

Question

Quizplus · Accepted Answer

Fatigue could confound a within-subjects design as it can affect participants' performance across multiple sessions. The other variables listed (ethnicity, gender, and intelligence) are typically not within the control of the experimenter in a within-subjects design, and therefore cannot be fully controlled as extraneous variables.

Controlling Within-Subjects Designs Which of These Extraneous Variables Could Confound