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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Psychol Assess. 2013 Jan 28;25(2):456–466. doi: 10.1037/a0031392

Figure 1.

Figure 1

Item characteristic curves (ICCs) and item information curves (IICs) for each of the eight ODD symptoms. ICCs are represented with solid lines. The probability of endorsing the item (labeled “1”) increases from 0.0 to 1.0 as theta increases. Conversely, the probability of not endorsing the item (labeled “0”) decreases from 1.0 to 0.0 as theta increases. IICs are represented with dotted lines. The peaks of the IICs indicate the level of theta at which each item provides maximum discrimination.