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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Am J Speech Lang Pathol. 2012 Jan 31;21(2):S140–S153. doi: 10.1044/1058-0360(2012/11-0089)

Figure 2.

Figure 2

Figure 2

Based on data reported in Schwartz et al. (2006), these plots comparing the distribution of response types (Correct, Semantic, Mixed, Unrelated, Formal, Neologism) for a single item to the distribution of response types on the full PNT. Figure 2A shows how a "good" item, GRAPES, elicits responses that are typical of patients at different levels of severity. By contrast, Figure 2B shows how a "bad" item, BINOCULARS, elicits responses that deviate from the typical response pattern. Our Item Response Analysis procedure quantified the discrepancy in response distributions to rank items for selection (see Appendix 1).