The drugs that are most likely to lead to dependence are the ones that have reduced effects after repeated use

It appears as though exercisers must maintain a ____ threshold of activity to see ____ effects

a. minimum, superficial c. maximum, beneficial b. minimum, beneficial d. maximum, superficial

In a pretest posttest design, there are 15 participants who each take both the pretest and posttest. How many degrees of freedom are present?

a. 12 c. 14 b. 13 d. 15