Public expressions of close friendship with a colleague at work usually enhance productivity and the quality of work performance

Which of the following roles has a negative effect on a group?

a. clarifier b. opinion giver c. tension-reliever d. joker

According to the text, the research of Brandon Centerwall was an important piece of the

puzzle in the study of media violence because it showed:

a. a relationship between media violence and aggressive behavior in the world outside the laboratory. b. a causal relationship between exposure to media violence and aggressive behavior in the laboratory. c. evidence for symbolic catharsis theory. d. evidence for the theory of excitation transfer. e. that the suicide rate increased in the United States, Canada, and South Africa after TV was introduced to those countries.