Most drugs activate the neurotransmitter __________, which is involved with the reward pathway (one of these answers is better than the others)

A 1-month-old swipes his hands at a keychain dangled in front of his face. What would be an appropriate analysis of this behavior?

a. This is a reflex that will soon go away. b. The infant is practicing coordination to reach the keys. c. This infant is developing fine motor skills faster than other infants his age. d. This infant is developing gross motor skills faster than other infants his age.

Sports spectators who start fights, throw bottles, and tear down goal posts after their team wins the game illustrate the possibility that aggression

a. can occur in the absence of frustration. b. is encouraged by any frustration that makes people uncomfortable. c. can be caused by a state of "learned helplessness." d. is caused by instinctual drives that require catharsis to lower one's aggressiveness.