________ is the quality of a sound that makes one musical instrument sound different from another, even when they are playing the same note

__________ studied the effects of stress on health

a) Paul Ekman b) Walter Cannon c) Hans Selye d) Diana Baumrind

What did Freud believe was the primary developmental task of adolescence?

a. Finding one's identity b. Channeling one's sexual energy into a healthy sexual relationship c. Deciding on a career d. Finding a partner to marry