Chapter 15

Why are hallucinations considered a "positive symptom"?

Some people offer to train you to use the right hemisphere of your brain more strongly, allegedly to increase creativity. If they were successful, can you see any disadvantage?

The concordance for schizophrenia is greater for dizygotic twins than for siblings. What is a likely explanation?

When addiction develops, how does the nucleus accumbens change its response to the addictive activity and to other reinforcements?

The fact that adopted children who develop schizophrenia usually have biological relatives with schizophrenia implies a probable genetic basis. What other interpretation is possible?

Someone who has quit an addictive substance for the first time is strongly counseled not to try it again. Why?

What is the season-of-birth effect?

Why do the immediate effects of antidepressants at synapses not explain their effects on behavior?

Name three ways a gene could influence alcoholism.

What drugs induce mainly the positive symptoms of schizophrenia? What drug can induce both positive and negative symptoms?

What change in sleep habits sometimes relieves depression?

What are two common treatments for bipolar disorder?

What is the benefit of adding naloxone to a methadone pill?