Which neurotransmitter appears to trigger a flood of unrelated thoughts, feelings, and perceptions, which may account for the voices, hallucinations, and delusions of schizophrenia?

Which one of the following groups has an above-average death rate compared to others the same age?

a. elderly people who are unhappily married b. widowed men between 55 and 65 years of age c. elderly widowers who have remarried d. widowed women between 55 and 65 years of age

__________ rewards are more likely to strengthen the internal sense of satisfaction a person has already gained from the mastery associated with completing a task

a. Intrinsic b. Informational c. Control-based d. Mastery