title: Validity of the Loewenstein occupational therapy cognitive assessment in people with intellectual disabilities.
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 alphas = .82, .74, .76, .86, and .80, respectively), but not on the Motor Praxis subscale (alpha = .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.
authors.affiliation: School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.
authors.forename: Yuh
authors.initials: Y
authors.lastname: Jang
authors.forename: Jen-suh
authors.initials: JS
authors.lastname: Chern
authors.forename: Keh-chung
authors.initials: KC
authors.lastname: Lin
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D003072:Cognition Disorders / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D009788:Occupational Therapy; D019989:Persons with Intellectual Disabilities; D012050:Rehabilitation, Vocational; D055815:Young Adult