Related Experiment Video
Updated: Aug 15, 2026
A Metric Test for Assessing Spatial Working Memory in Adult Rats Following Traumatic Brain Injury
Published on: May 7, 2021
The high-level mobility assessment tool (HiMAT) for traumatic brain injury. Part 2: content validity and
G P Williams1, V Robertson, K M Greenwood
1Physiotherapy Department, Epworth Hospital, 89 Bridge Rd., Richmond 3121, Victoria, Australia. gavinw@epworth.org.au
Primary Objectives:
(i) To assess the measurement properties of the high-level mobility assessment tool (HiMAT) for people with traumatic brain injury (TBI), (ii) to measure the extent to which the HiMAT is a uni-dimensional, discriminative hierarchical outcome scale.
Research Design:
The content validity was assessed using a three-stage process of investigating internal consistency, factor analysis and Rasch analysis. The uni-dimensionality of the HiMAT items was also tested. Discriminability was investigated by correlating raw and logit scores obtained from Rasch analysis. The study was conducted at a major rehabilitation facility using a convenience sample of 103 adults with TBI.
Main Outcomes And Results:
The internal consistency for the high-level items was very high (Cronbach's alpha = 0.99). Principal axis factoring identified several balance items as belonging to a second factor not related to high-level mobility, hence these items were excluded. Rasch analysis identified several misfitting items, such as walking around a figure of eight and stopping from a run, which were also excluded. Logit scores were used to exclude clustered and, therefore, redundant items. Raw scores correlated very highly (r = 0.98) with logit scores, indicating that raw scores provided good discriminability and were suitable for use by clinicians.
Conclusion:
The HiMAT, which assesses higher-level mobility requirements of people with TBI for return to pre-accident social, leisure and sporting activities, is a uni-dimensional and discriminative scale for quantifying therapy outcomes.
