Df1 + df2 = __________. (Give a symbol.)

Suzie notices that her daughter Nina loves to play piano. Suzie decides to encourage her further by promising to pay her a dollar for every extra hour of piano practice in the evening. Chances are that Nina's intrinsic interest in playing the piano will likely

a) Decrease b) Increase c) Remain unwatched d) Rise sharply

According to the evolutionary perspective, women prefer a. wealthy men because wealth is the criterion they use to estimate their best chances for reproductive success. b. physically attractive men because of the social benefits that come from being associated with such men. c. wealthy men because wealth gives them the freedom to pursue the lifestyle they have been socialized todesire

d. men who play hard to get because such men bring about psychological reactance, which can lead to themisattribution of arousal.