The concept of natural selection was adapted to the study of human behavior by the followers of which school of thought in psychology?

An imitation treatment that looks or tastes like the real therapy but has none of its key ingredients is:

a.) a confounding variable. b.) considered to be experimental fraud. c.) known as a placebo. d.) controlled by the FDA.

An investigation of students' housing preferences would probably show that single rooms are preferred by _______whereas suites are preferred by _______

a. extraverts; introverts room; introverts like to spend time alone and would enjoy the single room. b. introverts; extraverts are more outgoing and would probably prefer the suite. c. good students; poor students d. poor students; good students e. white students; minority students