Love, loyalty, and shared values are key factors in a healthy marriage

Students often start looking at the clock on the wall of the classroom (or at their watches) just before the bell sounds to end the class. In this case, glancing at the clock (or watch) is reinforced on a(n) __________ schedule of reinforcement.

a. regular b. variable c. interval d. ratio e. constant

Michael has two older sisters. He plays Barbies with them at home. On his first day of preschool he started to play with the dolls with his female classmates. Michael is

A) gay. B) likely to be criticized by peers for crossing gender lines. C) choosing parallel play. D) showing cultural differences in play.