Type I

Type II

Type III

Positive symptoms

Premorbid good

Acute debut

Normal CT

Good response to treatment

Good evolution over time

Negative symptoms

Premorbid fool

Insidious debut

Abnormal CT

Resistance to treatment

Bad evolution over time

Speech + disorganized behavior

Cognitive and attention defects

Positive + negative symptoms

Many manifestations simulate negative symptoms, but they are the consequence of drugs