Whose major contributions to the new psychology involved the two-point threshold and the just noticeable difference??

High testosterone levels in men are reflected in a. wide-set eyes and full lips

b. an impaired immune system. c. a square jaw. d. a childlike face.

Manny, Moe, and Jack were all born in 2002. They are part of the same __________.

A. social status B. generation C. birth cohort D. socioeconomic status