Answer to Question 1
Ans: B
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The DSM-IV-TR (APA, 2000) lists three negative characteristic symptoms of schizophrenia: alogia, affective blunting, and avolition. Other common negative symptoms include anhedonia and attentional impairment. Poverty of speech is classified as a negative symptom, while hostility, bizarre behaviors, and thought disorders are considered to be positive symptoms.
Answer to Question 2
Ans: D
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Schizophrenia is thought to have multiple etiologies. The overwhelming body of scientific evidence suggests that schizophrenia is a brain disease. Computed tomography scanning and magnetic resonance imaging have shown frequent enlargement of the lateral cerebral brain ventricles in people with schizophrenia.