Amphetamines increase alertness by stimulating the release of dopamine in the frontal cortex

Which of the following would be the MOST common type of hallucination?

A) That dog is singing to me and asking me to sing along. B) That butterfly is growing so much it is as big as the house. C) There are invisible bugs crawling under my skin. D) My intestines are a mass of wiggling worms.

Denny is quite fearful of going to the dentist. Over time, he has noticed that he becomes anxious at even the smell of the dentist's office

Every step Denny takes, right up until the dentist starts to drill a tooth, seems to cause muscle tension and anxiety. Denny is experiencing _____ a) reflexive conditioning. b) operant conditioning. c) graduated conditioning. d) higher-order conditioning.