People who take the hallucinogenic drug PCP have symptoms that closely mimic schizophrenia because PCP affects which of the following neurotransmitters in the brain?

Kevin is told that if he works for five days at a telemarketing job, he can expect to earn $100 a day on commission alone. When he gets his paycheck at the end of the week, it comes to only about $80 per day. He's very upset even when he finds out that his co-workers all made only about $60 each per day. This is an example of

A) unfulfilled expectations leading to frustration. B) catharsis. C) instrumental aggression. D) hostile frustration. E) dispositional frustration.

Sensations are organized into meaningful perceptions by

a. perceptual constancies. b. localization of meaning. c. perceptual grouping (Gestalt) principles. d. sensory adaptation.