A cessation of menstruation in women usually occurs between ages 45 and 55. This is called __________

Getting paid every two weeks at your job comes closest to which schedule of reinforcement?

a. variable ratio b. variable interval c. fixed ratio d. fixed interval

Researchers in Japan and the United States found that playing violent video games early in the school year was related to

a. poor school achievement later in the school year. b. no relationship with aggression later in the school year. c. higher levels of aggression later in the school year. d. problems in forming friendships later in the school year.