Controlling Within-Subjects Designs Libby compared different strategies for teaching patients to inhale large volumes of air.She observed that subjects generally produced their largest inhalation volumes during the last strategy condition even though she randomized treatment order.Her findings suggest that ____ influenced her results.
A)carryover effects
B)fatigue effects
C)interference effects
D)practice effects

Question

Quizplus · Accepted Answer

Libby's observation that subjects generally produced their largest inhalation volumes during the last strategy condition, despite randomization of treatment order, suggests that practice effects influenced her results. Practice effects occur when participants improve in a task over time simply because they have had more practice at it, not necessarily because of the specific treatment or strategy being tested.

Controlling Within-Subjects Designs Libby Compared Different Strategies for Teaching Patients