Demographic data.

<p>Gender, age (ys), education (ys), duration of illness (ys), SANS (Scale for the Assessment of Negative Symptoms), SAPS (Scale for the Assessment of Positive Symptoms), and vernier duration (VD). There are more males in the schizophrenia group. Controls are better educated than patients and relatives. The VD of schizophrenic patients is nearly twice that of relatives and controls. Indicated are means and standard deviations.