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Table 3 Means, standard deviations, item difficulty (a), and discrimination (b) of the 10 items in the OFS

From: Development and validation of the openness to the future scale: a prospective protective factor

  General Population Clinical Population
Item M (SD) a b1 b2 b3 b4 M (SD) a b1 b2 b3 b4
1 3.98 (.84) 1.48 −6.24 − 3.31 − 1.89 1.46 3.18 (1.23) 1.72 −3.04 −1.07 .29 2.59
2 3.97 (.93) 2.16 −6.41 − 3.61 − 2.12 1.50 3.09 (1.26) 2.28 −3.22 −1.05 .55 3.05
3 3.89 (.91) 1.68 −5.66 −3.17 −1.67 1.69 2.76 (1.24) 2.08 −2.26 −.27 1.15 3.92
4 4.02 (.94) 1.47 −5.06 −3.35 −1.54 .91 3.10 (1.22) 1.66 −2.66 −1.07 .53 2.73
5 4.36 (.85) 1.32 −5.48 −3.74 −2.46 −.17 3.32 (1.38) 1.68 −2.50 −1.12 −.17 1.67
6 3.60 (1.26) .83 −3.07 −1.32 −0.44 .87 2.94 (1.41) .63 −1.52 −.19 .49 1.54
7 4.01 (.98) 1.04 −4.93 −2.57 −1.37 .71 3.21 (1.35) 1.59 −2.49 −1.05 .22 1.86
8 4.27 (.78) 2.46 −8.62 −5.70 −3.48 .57 3.42 (1.25) 2.78 −4.36 −2.01 −.34 2.61
9 4.11 (.99) .92 −4.57 −2.63 −1.45 .35 3.83 (1.19) 1.32 −3.16 −2.26 −.91 .82
10 4.07 (.82) 1.36 −5.46 −3.93 −1.96 1.06 3.45 (1.18) 1.94 −3.43 −2.05 −.32 2.36
  1. Means (M), standard deviations (SD)