Practice graphing the results of the experiment on the effect of amount and frequency of exercise on depression. In the actual experiment, there was a main effect of amount of exercise: Participants in the 17.5 kcal/kg/ week condition had lower depression scores after 12 weeks than the participants in the 7.0 kcal condition. There was no main effect of amount of exercise: It did not matter whether exercise was scheduled for 3 or 5 times per week. There was no interaction effect. For this activity, higher scores on the depression measure indicate greater depression. Scores on this measure can range from 0 to 16.