Describe the difference between positive and negative symptoms of schizophrenia and give some ...

Positive symptoms include manifest behaviors that should be absent, such as delusions (unfounded beliefs), hallucinations (abnormal sensory experiences), disorganized speech, and grossly disorganized behavior. Each of these is a judgment call. Sometimes a statement that appears to be a delusion (People are persecuting me) is actually true, or at least defensible. Many healthy people have heard a voice when they knew they were alone, most often when they were just waking up.

Negative symptoms include absent behaviors that should be present, such as weak social interactions, emotional expression, speech, and working memory. Negative symptoms are usually stable over time and difficult to treat.