Just as Ethan is about to save the final draft of his term paper, his baby sister trips over the computer's power cord and the screen goes blank. After taking a few deep breaths, Ethan restarts the computer and begins searching for earlier versions of the

Systematic and contact desensitization evolved from:

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

Sir Karl Popper is known for his ideas concerning the role of ______ in science, a

concept related closely to the idea of letting evidence constrain one's beliefs. (a) laboratory simulations (b) creativity (c) falsification (d) concrete operations (e) all of the above