Among pygmy chimpanzees, about ________ percent of all observed sexual activity is between members of the same sex

Sleep spindles appear during __________ sleep

a) stage 1 b) REM c) stage 2 d) stage 4

Which of the following is an example of modeling?

A. A parent tells a child to be polite. B. A class member laughs when someone answers a question incorrectly. C. You watch a parent hit your sister and then you also decide to hit your sister. D. A young woman has an unhappy experience with a group of other students and decides to avoid them.