Author Question: An experimenter was interested in the effect of caffeine on a performance test. Three equivalent ... (Read 52 times)

Tazate · **on:** Jun 20, 2018

An experimenter was interested in the effect of caffeine on a performance test. Three equivalent groups consumed high, moderate, or low amounts of caffeine before taking the performance test. This experiment had

a. three independent variables.
b. one independent variable with three levels.
c. three dependent variables.
d. one dependent variable with three levels.

Question 2

Refer to Exhibit 10-12. Which is the comparison group?

a.
aerobic exercises five days per week
c.
no aerobic exercise.
b.
aerobic exercises three days per week