In an experiment examining the effects of running on stress levels, one group of participants is tested after running on a treadmill for 30 minutes. A week later, the same group of participants is...

In an experiment examining the effects of running on stress levels, one group of participants is tested after running on a treadmill for 30 minutes. A week later, the same group of participants is tested after resting on a bed for 30 minutes. This is an example of a ………………… design.

a. single-subjects

b. between-subjects

c. within-subjects

d. matched groups