In intrasubject research, the ABA design differs from the ABAB design in that the latter design contains an additional __________ phase

Each of the following is true of Plutchik's theory of emotions except ________

a. it appears to apply equally well to people of all cultures b. each of the emotions he describes helps us to adjust to the environment in different ways c. each of the basic emotions can vary in intensity d. different emotions can be combined to produce a wider range of emotional experiences

With more people being involved in nonmarried sexual relationships, this trend tends to

a. lower the use of contraceptives. b. increase extramarital sexual activity. c. increase the number of sexual partners adult men and women have. d. lead to a wholesale move toward sexual promiscuity.