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I have been told that the PPVT-III is co-normed with the EVT. What does that mean and what is the advantage of co-norming?

April 26, 2017advantage co-normed evt mean ppvt-iii

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I have been told that the PPVT-III is co-normed with the EVT. What does that mean and what is the advantage of co-norming?

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Being co-normed means that the PPVT-III and the EVT were standardized at the same time with the same population. The advantage of co-norming these two measures is that it enables the examiner to make direct comparisons of an examinee’s receptive and expressive vocabulary.