The "Lake Wobegon effect" refers to the effect of teachers' expectations on students' test scores

If the dimes stop coming out, then after a while you would expect the response rate

to (a) decrease, Garcia (b) increase, partial reinforcement (c) decrease, extinction (d) stay the same, spontaneous recovery

Which of these is NOT cited in the text as a reason for joining groups?

a. the chance to affiliate b. the process of social comparison c. social support d. the opportunity for individual power