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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.