Among adolescents, those who complemented suicide were more likely to have displayed a/an____________within a week of the suicide, suggesting that it may serve as an effective warning sign.

Huntington's disease is characterized by progressive deterioration of the ______

a. basal ganglia c. hippocampus b. reticular formation d. substantia nigra

____________________ reinforcement occurs when a response is strengthened because it is followed by the presentation of a desirable stimulus; ____________________ reinforcement occurs when a response is strengthened as the result of the removal of an unpleasant stimulus

Fill in the blank(s) with correct word