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Matching Variables For Research Involving Youth With Down Syndrome: Leiter-R Versus Ppvt-4, B. Allyson Phillips
Matching Variables For Research Involving Youth With Down Syndrome: Leiter-R Versus Ppvt-4, B. Allyson Phillips
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Much of what is known about the cognitive profile of Down syndrome (DS) is based on using either receptive vocabulary (e.g., PPTV-4) or nonverbal ability (e.g., Leiter-R) as a baseline to represent cognitive developmental level. In the present study, we examined the relation between these two measures in youth with DS, with non-DS intellectual disability (ID) and with typical development (TD). We also examined the degree to which these two measures produce similar results when used as a group matching variable. In a cross-sectional developmental trajectory analysis, we found that the relation between PPVT-4 and Leiter-R was largely similar across …