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Table 2 Slope, location and chi-square tests for the positive affect scale

From: An application of item response theory to psychological test development

Items Slope (a) Location (b) χ 2 df p
1 1.10 -0.84 65.70 49 0.06
2 0.99 -1.07 71.60 45 0.08
3 0.76 -2.00 45.48 42 0.33
4 0.63 -2.46 33.28 36 0.60
5 0.63 -1.77 59.14 45 0.08
6 1.14 -1.20 42.90 39 0.31
7 0.48 -2.71 68.43 43 0.01
8 0.92 -1.33 68.24 42 0.01
9 1.08 -0.97 40.87 44 0.61
10 0.86 -1.77 52.30 38 0.06