Both experimental and correlational studies can be done employing methods that compare heart rate and interest in material. These types of measurements may be referred to as ___________

When Newcomb (1961) randomly assigned male students at the University of Michigan to be roommates at the start of the school year, he found that ________ and ________ were powerful predictors of who would become friends

a. demographic similarity; physical attractiveness b. demographic similarity; attitude similarity c. attitude similarity; physical attractiveness d. physical attractiveness; the number of friends in common

Group structure refers to the

a. strength of the group members' desire to remain in the group. b. accepted but unspoken standard of conduct for appropriate behavior. c. organization of roles, communication, and power in the group. d. degree of attraction among group members.