Jerry is a professional football player who injured his knee while running during a game. Jerry has had surgery and his knee is fully healed, but he is afraid to put pressure on it because he doesn't want to re-injure it. The trainer implements a plan in which he first differentially reinforces standing, then walking, then jogging, and finally running at full speed. This is an example of using

An experimenter finds that a certain male subject always has an increased heartbeat when he sees a picture of a nude female. The experimenter sounds a buzzer and then presents such a picture

The experimenter repeats this procedure until the man responds with an increased heartbeat to the sound of the buzzer alone. In this situation the UNCONDITIONED response is the _______. a. increased heartbeat b. female's picture c. sounds of the buzzer d. viewing of the picture

Dr. Swaminathan has recruited 100 participants to be in his study on personality traits. He

knows that many of them differ with respect to education, socioeconomic status and religion. To equally distribute these differences across the four groups he will use in his study, Dr. Swaminathan should a. assign subjects to groups using a counterbalancing procedure. b. randomly assign subjects to the groups. c. provide operational definitions for education, socioeconomic status, and religion. d. design the study so the effects of these variables on personality can also be measured. e. provide a valid operational definition of the dependent variable.