The unitary ability of IQ in the WISC-IV and its computation

Orsini, A., Pezzuti, L. and Hulbert, S. (2014) The unitary ability of IQ in the WISC-IV and its computation. Personality and Individual Differences, 69. pp. 173-175. ISSN 0191-8869.


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Flanagan and Kaufman (2009) use a difference of 23 IQ points between the highest score (Max) and the lowest score (Min) reported by subjects in the 4 Indexes of Verbal Comprehension, Perceptual Reasoning, Working Memory and Processing Speed to define unitarity of IQ in the WISC-IV. Such a difference in scores is considered very rare and the authors therefore conclude that the total IQ scores in these cases cannot be interpreted. Hereby, we want to argue against the choice of this cut-off threshold value by showing that it was based on the wrong standard deviation value when first computed.

Item Type: Article
Uncontrolled Keywords: IQ unitarity; WISC-IV; Max–Min
Subjects: B Philosophy. Psychology. Religion > BF Psychology > BF0176 Psychological tests and testing
Divisions: pre Nov-2014 > Faculty of Social and Applied Sciences > Applied Social Sciences
Depositing User: Dr Sabina Hulbert
Date Deposited: 31 Oct 2014 17:09
Last Modified: 22 Jan 2016 08:00

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Last edited: 29/06/2016 12:23:00