Once in the bloodstream, the magnitude of a drug's effect is most directly a result of

a. the concentration of the drug in the blood supply.
b. the gender of the user

Robert's dog, Little Gut, runs to Robert when he says, "Come." If one day, Little Gut comes running when Robert says, "Dumb," we might say that Little Gut has demonstrated

a. spontaneous recovery. b. social learning. c. insight learning. d. intermittent reinforcement. e. stimulus generalization.

Nearly 15 percent of recent marriages occurred between partners of different races or ethnicities

Indicate whether the statement is true or false.