Which hormone stimulates the testicles to produce male hormones?

To increase organizational citizenship behaviour

A) reduce turnover. B) increase job satisfaction. C) increase performance. D) decrease procedural fairness. E) reduce organizational commitment.

Ekman and Friesen (1971) collected convincing evidence that facial expressions are universal. In their research, they studied

a. blind people who smile, even though they have never seen a smile. b. a preliterate tribe in an isolated part of New Guinea. c. infants before they learned to talk. d. facial expressions on five different continents.