The field of behavioral genetics studies the effects of heredity on

Nonsampling error leads to

a. probability sampling. b. quasi-experiments. c. problems with generalization of results d. stratification of participants in the sample.

After World War II, the Veterans Administration

a. funded the training of a large number of psychologists. b. conducted independent research refuting the efficacy of behavior therapy. c. recognized that additional mental health services were needed for traumatized veterans and trained physicians, rather than psychologists, to provide these services. d. publicized criticisms of clinical psychologists that ultimately reduced the pay that clinical psychologists were able to command.