Abstract

DOMINGUEZ LARA, Sergio Alexis. Psychometric Properties of a Quality of Life Scale for Adults with Intellectual Disabilities. Psychol. av. discip. [online]. 2015, vol.9, n.1, pp.29-43. ISSN 1900-2386.

The aim was to analyze the psychometric properties of the objective section of the Integral Quality of Life Scale in a sample of 102 persons with intellectual disabilities, 61 men (59.8 %) and 41 women (43.7 %), aged between 18 and 58 years (M = 24.05, SD = 9.57). Of the participants, 38 (37.3 %) have a mild disability, 46 (45.1 %) have a moderate disability, and 18 (17.6 %) have a severe disability, as reported by the family and institutions. The confirmatory factor analysis conducted reveals that this presents a five-factor structure with an empirically important general factor (bifactor model). Furthermore, regarding the reliability of the construct by coefficient Rho an indicator of .952 was obtained, and based on the model bifactor reliability factor was estimated through the omega coefficient, obtaining an indicator of .951 to the total scale, .888 for the «Self-Determination», .643 factor for the «Social Inclusion», .859 factor for the «Laboral Wellbeing» factor, .918 for the «Material Wellbeing» and .866 for factor factor «Emotional and physical Wellbeing». We conclude that the objective scale has adequate to continue validation studies using other strategies, supporting its use as a tool for assessing the quality of life in adults with intellectual disabilities.

Keywords : intellectual disability; validity; reliability; quality of life.

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