Some problems revolve around the inability to verify hallucinations. Because she acts this way. Because she is schizophrenic. Sometimes violent , frenzied behavior .
Negative symptoms prevail.
Relative contributions of heredity and environmental influences can be compared. For failures of the dopamine hypothesis, see pp. Close relatives also show higher rates of this problem, but so do those with bipolar disorder. Other assorted neurophysiological oddities are more common among schizophrenics. However, this is also more common among nonschizophrenic relatives than normals, and those with mood disorders, alcoholism, prenatal complications, etc.