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Table 2 Scalabilities in the Mokken nonparametric analyses

From: An item response theory evaluation of three depression assessment instruments in a clinical sample

Item scalabilities, Hi
Item scalab. Item scalab. Item scalab. scalab*.
AS-18-D1 0.326 PHQ9:1 0.584 MADRS1 0.469 0.514
AS-18-D2 0.590 PHQ9:2 0.603 MADRS2 0.442 0.476
AS-18-D3 0.460 PHQ9:3 0.481 MADRS3 0.419 0.449
AS-18-D4 0.576 PHQ9:4 0.478 MADRS4 0.103  
AS-18-D5 0.557 PHQ9:5 0.385 MADRS5 0.338 0.359
AS-18-D6 0.491 PHQ9:6 0.588 MADRS6 0.358 0.370
AS-18-D7 0.543 PHQ9:7 0.567 MADRS7 0.281 0.349
AS-18-D8 0.513 PHQ9:8 0.400 MADRS8 0.388 0.456
AS-18-D9 0.582 PHQ9:9 0.468 MADRS9 0.371 0.410
     MADRS10 0.257 0.332
Total H 0.513   0.510   0.339 0.415
Boot-strapping C.I. [0.41, 0.63]   [0.42, 0.61]   [0.25, 0.43] [0.31, 0.51]
Cronbach´s alpha 0.89   0.88   0.81 0.84
no. of obs. 57   59   56 56
  1. * Scalabilities calculated with MADRS4 deleted.