Mario conducts a study on what Caucasians perceive as physically attractive, then conducts the same study with African Americans, and then with Asian Americans as the sample. Mario is using ________ to determine the external validity of his findings

Which of the following is NOT considered to be a major source of reward that predicts interpersonal attraction?

a. proximity b. similarity c. self-disclosure d. physical attractiveness e. sense of humor

Categorization helps infants learn and remember by

A) teaching them how to group abstract stimuli. B) enhancing their symbolic understanding. C) reducing the enormous amount of new information they encounter every day. D) pairing objects with word associations.