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. Author manuscript; available in PMC: 2010 Jun 29.
Published in final edited form as: Dev Psychol. 2008 Mar;44(2):365–380. doi: 10.1037/0012-1649.44.2.365

Figure 1. IRT trace lines for four of the 21 internalizing symptomatology items for the N=1827 subjects in the calibration sample.

Figure 1

note: Item 5 = spells of terror or panic; Item 9 = feel that I have to be perfect; Item 17 = feel worthless or inferior; Item 18 = nervous or tense;