Bud and Lou are both playing with blocks. Though they are playing, they smile at each other and trade blocks from time to time. It is most likely that Bud and Lou are involved in

a. cooperative play

Some of the earliest psychologists to take up the challenge of studying learning were of the __________ school of thought, which suggested that we can only study that which can be seen and observed

a. behavioral b. nomothetic c. ideographic d. empirical

Systematic and contact desensitization evolved from

a. classical conditioning principles. b. modeling therapies. c. biofeedback techniques. d. operant conditioning principles.