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Table 6 Discrimination of the Positive Symptoms Items

From: Use of NON-PARAMETRIC Item Response Theory to develop a shortened version of the Positive and Negative Syndrome Scale (PANSS)

Criterion 1 2 3 4 5 Rating
P1. Delusions 6 (Yes) Yes Yes Yes Yes Very Good
P2. Conceptual
Disorganization
5 (Yes) Somewhat Yes Yes Yes Very Good
P3. Hallucinatory
Behaviour
6 (Yes) Yes Yes Yes Yes Very good
P4. Excitement 5 (Yes) Yes Yes Yes Yes Very Good
P5. Grandiosity 6 (Yes) Somewhat Somewhat Yes Yes Good
P6. Suspiciousness/
Persecution
5 (Yes) Somewhat Yes Yes Yes Very Good
P7. Hostility 5 (Yes) No Somewhat Yes No Weak
  1. Note. Ratings are based on the operational criteria presented in Table 3.