When test results are in agreement with some other direct and independent measure of that which the test is designed to predict, the test exhibits ______

Ellen is within 15 pounds of her ideal body weight, yet she constantly worries about becoming obese. Usually, she eats a reasonable diet. When her self-control falters, she binge-eats, indulging herself in a dozen donuts at one sitting. She makes up for these lapses by forcing herself to regurgitate the food. Ellen probably suffers from:

anorexia nervosa. bulimia nervosa. generalized anxiety disorder. self-enforced starvation.

An important feature of cognitive science is that it emphasizes

a. individual differences in cognition. b. an interdisciplinary approach. c. that all mental processes should be explained in biological terms. d. that researchers should focus on personality characteristics.