Discriminant construct validity of ImPACT™: A companion study

A. Maerlender, L. Flashman, A. Kessler, S. Kumbhani, R. Greenwald, T. Tosteson, T. McAllister

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

In a previous analysis of ImPACT scores relative to traditional neuropsychological tests (NP) and experimental tasks (Maerlender et al., 2010) we demonstrated convergent construct validity for the primary ImPACT test-score composites. A complete analysis of discriminant validity was not undertaken at that time. Here, test scores from the 54 collegiate football and hockey players were re-analyzed to specifically address the discriminant validity of the ImPACT™ composite scores using a multiply operationalized correlation matrix of multi-trait multi-method data. In the method used here, discriminant validity is determined by obtaining non-significant correlations between a target score when correlated with the average of the other trait measurements (multiply-operationalized multi-trait-mono-method analysis). Results showed that the ImPACT™ Verbal Memory (p =.044), Visual Memory (p =.006), and Visual Motor Speed (p =.000) scores were highly correlated with composites of the other scores, while the Reaction Time composite demonstrated adequate discriminant validity (p =.145). In comparison all of the NP composites showed good discrimination (all p-values >.05, except for Reaction Time p =.05). Thus the apparent lack of discriminability between three of four composite scores in this sample raises questions about using ImPACT™ composite scores to support specific construct-oriented interpretations. Taken together, the discriminant and convergent construct validity properties of ImPACT™ indicate construct sensitivity, but limited construct specificity.

Original languageEnglish (US)
Pages (from-to)290-299
Number of pages10
JournalClinical Neuropsychologist
Volume27
Issue number2
DOIs
StatePublished - Feb 1 2013

Keywords

  • Contruct validity
  • Discriminant validity
  • ImPACT™
  • Neuropsychological testing
  • Sports concussion

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Developmental and Educational Psychology
  • Clinical Psychology
  • Arts and Humanities (miscellaneous)
  • Psychiatry and Mental health

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    Maerlender, A., Flashman, L., Kessler, A., Kumbhani, S., Greenwald, R., Tosteson, T., & McAllister, T. (2013). Discriminant construct validity of ImPACT™: A companion study. Clinical Neuropsychologist, 27(2), 290-299. https://doi.org/10.1080/13854046.2012.744098