Validity of the motor-free visual perceptual test- revised (MVPT-R): An item response analysis

Ted Brown, Sylvia Rodger, Aileen Davis

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

Background: Visual perceptual skills of children are often evaluated. The Motor-Free Visual Perception Test-Revised (MVPT-R) is one of the most frequently used tests with school-age children even though its construct validity has not been thoroughly evaluated. Aim/Purpose: The purpose of the study was to evaluate the scalability/interval level measurement, unidimensionality, lack of differential item functioning (DIF), and hierarchical ordering of items of the MVPT-R. Method: The visual perceptual performance scores from a sample of 356 normally developing children (171 boys and 185 girls) ranging in age from 5 to 11 years were used to complete a Rasch Measurement Model (RMM) analysis of the MVPT-R. Results: When the MVPT-R was analyzed using the RMM, it exhibited adequate measurement properties (scalability/interval level measurement, unidimensionality, lack of DIF, and hierarchical ordering). However, many MVPT-R scale items exhibited RMM misfit or DIF. Conclusion: The construct validity, scalability, hierarchical ordering, and lack of DIF requirements were met by the final version of the of the MVPTR scale. However, given the fact that a number of items exhibited RMM misfit or DIF, clinicians need to take this into consideration when using the MVPT-R in its current form. © 2008 by The Haworth Press.

Original languageEnglish
Pages (from-to)33-60
Number of pages28
JournalJournal of Occupational Therapy, Schools, & Early Intervention
Volume1
Issue number1
DOIs
Publication statusPublished - 2008

Keywords

  • Assessment
  • Children
  • Validity
  • Visual perception

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