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Research Article  |   July 2009
Validity of the Loewenstein Occupational Therapy Cognitive Assessment in People With Intellectual Disabilities
Author Affiliations
  • Yuh Jang, PhD, OTR, is Assistant Professor, School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan
  • Jen-suh Chern, PhD, OTR, is Assistant Professor, Department of Occupational Therapy, Chang Gung University, Taoyuan, Taiwan
  • Keh-chung Lin, ScD, OTR, is Director, Division of Occupational Therapy, Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan, and Associate Professor and Chair, School of Occupational Therapy, College of Medicine, National Taiwan University, 17, F4, Xu Zhou Road, Taipei, Taiwan; kehchunglin@ntu.edu.tw
Article Information
Intellectual Disabilities / Rehabilitation, Disability, and Participation
Research Article   |   July 2009
Validity of the Loewenstein Occupational Therapy Cognitive Assessment in People With Intellectual Disabilities
American Journal of Occupational Therapy, July/August 2009, Vol. 63, 414-422. doi:10.5014/ajot.63.4.414
American Journal of Occupational Therapy, July/August 2009, Vol. 63, 414-422. doi:10.5014/ajot.63.4.414
Abstract

We examined the psychometric properties (internal consistency, concurrent criterion validity, and known-group validity) of the Loewenstein Occupational Therapy Cognitive Assessment (LOTCA) in people with intellectual disabilities. A total of 111 people with intellectual disabilities and 19 people with no disabilities were included. We used Cronbach's alpha, Spearman's rho, the Kruskal–Wallis test, and one-way analysis of variance for analysis, where appropriate. Results showed good internal consistency on Orientation, Visual Perception, Spatial Perception, Visuomotor Organization, and Thinking Operations subscales (Cronbach's αs = .82, .74, .76, .86, and .80, respectively), but not on the Motor Praxis subscale (α = .48). We found significant correlations between participants’ performance on the Pictorial IQ test and disability level and scores on the LOTCA. The known-group validity of the LOTCA in people with intellectual disabilities was satisfactory. We concluded that the LOTCA is a suitable instrument for measuring cognitive abilities and visual perception in people with intellectual disabilities.