An order effect occurs when
A) one group is given the first treatment, and the other is subsequently given the other treatment
B) one group is used, but the first treatment has no influence upon the second
C) two groups are used, and the first group is treated first and the second group treated next
D) the same subjects are used for both groups, and the treatment given first changes performance on the treatment given second

Question

Quizplus · Accepted Answer

Order effects occur when the sequence in which treatments are administered affects the outcome, as in option D where the first treatment influences the performance on the second treatment.

An Order Effect Occurs When