Journal article

Rasch Analysis of the Independent Mobility Questionnaire

Eva K Fenwick, Fleur O'Hare, Lil Deverell, Lauren N Ayton, Chi D Luu, Shane McSweeney, Sharon A Bentley, Robyn H Guymer, Robert P Finger

OPTOMETRY AND VISION SCIENCE | LIPPINCOTT WILLIAMS & WILKINS | Published : 2016

Abstract

PURPOSE: The Independent Mobility Questionnaire (IMQ) assesses participants' perceived ability for independent mobility. However, it has not been validated in a severely visually impaired population. The aim of this study was to explore the IMQ's psychometric properties in participants with severe visual impairment. METHODS: This was a cross-sectional study of 40 participants with retinitis pigmentosa (better eye visual acuity <20/200 and/or visual field 1.4); however, given our sample size restrictions, these items were not removed from the analysis. The IMQ had good construct validity (moderate correlation with the Impact of Vision Impairment Mobility subscale, r = 0.595, p < 0.05) but did..

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Grants

Awarded by NHMRC Centre for Clinical Research Excellence Award


Awarded by NHMRC


Funding Acknowledgements

Supported by the Australian Research Council through its Special Research Initiative in Bionic Vision Science and Technology grant to Bionic Vision Australia, and a Retina Australia Research Grant to LNA and SAB. CERA receives Operational Infrastructure Support from the Victorian Government and is supported by NHMRC Centre for Clinical Research Excellence Award 529923. EKF is the recipient of an NHMRC Early Career Fellowship (1072987).