Final answer:
Negative symptoms of schizophrenia include flat affect, social withdrawal, and loss of basic drives or motivation.
Step-by-step explanation:
Negative symptoms of schizophrenia refer to a reduction or absence of normal behaviors or functions. Some examples of negative symptoms include flat affect, which is a lack of emotional expression; social withdrawal, where the person avoids social interactions; and a decline in basic drives or motivation. On the other hand, hallucinations and delusions of grandeur are examples of positive symptoms, which involve the presence of abnormal experiences or beliefs. It's important to note that not all individuals with schizophrenia experience the same symptoms, and the severity and type of symptoms can vary.