Harlow conducted his research on children's attachments to their mothers using

Drugs such as barbiturates and alcohol are classified as depressants because they

a. inhibit the transmission of nerve impulses in the central nervous system. b. lead to tolerance. c. bring about depression when they are not being used. d. are likely to cause a variety of mood disorders, especially depression.

Among psychoanalysts, homosexuality was first seen as ________, but later was seen as ________

A) a form of criminal behavior; defense against heterosexual urges B) a result of highly pathological parent-child relationships; a conscious effort to gain attention C) a severe form of psychological disability; a normal variant of sexual behavior D) a variation of sexual function; a pathological escape from heterosexuality