Powel wants to find out how using fins increases swimming speed. This hypothesis could be tested with a counterbalanced repeated measures design by:
A)having half the swimmers swim without fins and the other half swim with fins.
B)having all swimmers first swim without fins and then swim with fins.
C)having half the swimmers first swim without fins and then with fins and having the other half swim first with fins and then without fins.
D)having all swimmers first swim with fins and then without fins.

Question

Quizplus · Accepted Answer

A counterbalanced repeated measures design requires all participants to experience all conditions of the experiment in a random order to control for practice and carryover effects. Therefore, dividing the participants into two groups and testing them separately (A) or testing them in only one order (B and D) does not meet this requirement. Choice C is the only option that satisfies the criteria of a counterbalanced repeated measures design by having half the participants experience the condition of swimming without fins first, and the other half experience the condition of swimming with fins first in a random order.

Powel Wants to Find Out How Using Fins Increases Swimming