Men who have never had an erection would be diagnosed as having __________ erectile disorder

On fixed schedules of reinforcement, once the pause following reinforcement has ended,

a. responding resumes but is very slow. b. responding resumes and is uniform. c. responding is sporadic until the next reinforcer is produced. d. a certain amount of time must pass before the next reinforcer is produced. e. a certain number of responses must occur before the next reinforcer is produced.

Wallerstein and Blakeslee found that almost 50% of children whose parents divorced were worried, underachieving, and self-deprecating:

A) for about two years after the divorce. B) only immediately after their parents' separation. C) only when the divorce was adversarial. D) even after they reached young adulthood.