Evaluating construct validity of the Slosson Visual-Motor Performance Test using the Rasch Measurement Model.
The aim of this study was to evaluate the construct validity of the Slosson Visual-Motor Performance Test by applying the Rasch Measurement Model to evaluate the test's scalability, dimensionality, differential item functioning based on sex, and hierarchical ordering. Participants were 400 children ages 5 to 12 years, recruited from six schools in Melbourne, Victoria, Australia. The Slosson Visual-Motor Performance Test requires a child to copy 14 different geometric designs three times each for a total 42 scale items. Children completed the test under the supervision of an occupational therapist. Overall, 13 of 42 of the test items exhibited poor measurement properties. As nearly one-third of the scale items were problematic, the Slosson Visual-Motor Performance Test in its current form is not recommended for clinical use.
Brown
Ted
T
Department of Occupational Therapy, School of Primary Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University-Peninsula Campus, Frankston, Victoria 3199, Australia. ted.brown@med.monash.edu.au
Unsworth
Carolyn
C
D002648:Child; D002657:Child Development / Q000502:physiology*; D002675:Child, Preschool; D005556:Form Perception / Q000502:physiology; D006801:Humans; D015233:Models, Statistical; D009048:Motor Skills / Q000502:physiology*; D019957:Motor Skills Disorders / Q000175:diagnosis; D011597:Psychomotor Performance / Q000502:physiology*; D054928:Validation Studies as Topic