Leon is intrinsically motivated to wash his neighbor's car. Accordingly, he expects his neighbor to give him ____.?

The negative symptoms of schizophrenia may be related to

A) having an older father. B) excessive birth weight. C) brain damage. D) a "schizophrenia gene." E) overactivity of dopaminergic neurons.

Ebbinghaus's original forgetting curves, which graphed his retention over time, suggested that most forgetting occurs

a. very gradually over long periods of time. b. only after several days have passed. c. as a result of interference with other information. d. very rapidly after learning something.