Compare and contrast the positive and negative forms of schizophrenia.

In the case of schizophrenia and other psychological disorders, a positive symptom is one that adds a behavior, thought or feeling, whereas a negative symptom takes away a behavior, thought or feeling.

Think positive as in adding in symptoms (hallucinations, delusions, disorganized speech)

Think negative as in taking away or losing (affective flattening, alogia, avolition, anhedonia, asociality)