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. Author manuscript; available in PMC: 2010 Mar 1.
Published in final edited form as: J Anxiety Disord. 2008 Jul 22;23(2):230–239. doi: 10.1016/j.janxdis.2008.07.005

Figure 1.

Figure 1

Option Characteristic Curves obtained from the nonparametric item response model. Item 3 demonstrated good psychometric properties in that each response option was effective in making a unique discrimination across levels of AS. Item 5, in comparison, is dominated by a single response option throughout most of the distribution of scores. Vertical dashed lines indicate the 5th and 94th percentiles of levels of AS for this sample.