Construct Validity of the Revised High-Level Mobility Assessment Tool for Children Who Are Developing Typically

Abstract

Objective: The aim of this project was to evaluate the construct validity of the high-level mobility assessment tool (HiMAT) for children who are developing typically with no underlying condition that may affect mobility. Methods: The HiMAT is a revised 8-item measure of high-level mobility. Rasch analysis was used to assess fit to the Rasch model indicating unidimensionality, person separation index local dependency, targeting of items, and differential item functioning. Results: Children with typical development aged 5 to 12 years (n = 1091; 554 girls and 537 boys) were recruited from 8 schools. The mean HiMAT score was 22.4/32 (range, 8-32). Data fit the Rasch model, indicating that the H..