The process of selection and facilitation in teen relationships can also happen among peer groups that are involved in drugs and sexual activity

Freud based his psychodynamic theory on

a. his patients' case histories. c. correlational research studies. b. observations of his children. d. experimental research studies.

Health psychology is best defined as the

a. study of the ways in which psychological principles can be used to prevent illness and promote health. b. use of psychological principles and research methods to solve practical problems. c. study of how individuals behave, think, and feel in the presence, actual or implied, of others. d. study of behavioral factors in medicine, physical illness, and medical treatment.