Which research technique did Kinsey and his colleagues use in their early studies of human sexual behavior?

Which of these is the best illustration of the concept of conditioning?

a) A cat scratches all four corners of a sofa. b) Jack watches a videotaped aerobics class. c) Students rush out of class as soon as the bell rings. d) Alice waits for a letter from her son who is in the military.

When people are asked to rate the attractiveness of faces, the faces that they most prefer

a. have the fewest blemishes. b. most resemble those of their current romantic partners. c. most differ from their own. d. most resemble their own.