Occurs between late teens and mid-30s; rare prior to adolescence.

• A. May be abrupt or insidious
• B. Onset of schizophrenia
• C. Slow/gradual development with deterioration in role functioning
• D. Psychotic features emergence

Answer: (D)

The key idea here is when schizophrenia tends to first become clinically evident. The characteristic spark is the emergence of psychotic symptoms—delusions, hallucinations, disorganized thinking or speech, and disorganized or catatonic behavior. This typically appears in late adolescence through the early to mid-30s, with onset before adolescence being very uncommon. So focusing on the first appearance of psychotic features best captures when the condition usually begins. While an abrupt or gradual onset or a slow deterioration in functioning can occur as the illness evolves, the initial, defining signal at this age range is the appearance of psychotic symptoms.