There is a need to be concerned with a carry-over effect when the design is a
A) times series design.
B) counterbalanced design.
C) randomized Solomon four-group design.
D) randomized control-group, posttest only design.

Question

Quizplus · Accepted Answer

A counterbalanced design involves systematically varying the order of presentation of different conditions, which helps eliminate carry-over effects. Times series designs, randomized Solomon four-group designs, and randomized control-group, posttest only designs do not involve varying the order of presentation and are therefore more susceptible to carry-over effects.

There Is a Need to Be Concerned with a Carry-Over