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Table 5 Slopes and Item Biserial Correlation for Each Item of the PANSS

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

Items Slopes Rank of Slopes Item biserial correlation
P3. Hallucinatory behaviour 0.510 1 0.760
P5. Grandiosity 0.495 2 0.673
P1. Delusions 0.495 3 0.686
P4. Excitement 0.467 4 0.617
P2. Conceptual Disorganization 0.455 5 0.670
P6. Suspiciousness/Persecution 0.410 6 0.650
P7. Hostility 0.382 7 0.553
  1. Note. Slopes were extracted from TestGraf output and were rounded to three decimal
  2. places. Similarities in the values of slopes are due to rounding (e.g. slope of P1 is
  3. 0.495090, slope of P5 is 0.495447).