Psychometric properties of the HIV/AIDS Knowledge Scale for Spanish adolescents (HIV-KS) / Propiedades psicométricas de la Escala de Conocimientos sobre VIH/SIDA para adolescentes (VIH-KS)
DOI:
https://doi.org/10.21134/haaj.v9i2.42Keywords:
Conocimientos sobre VIH/SIDA, escalas, propiedades psicométricas, adolescentes. / Keywords, HIV/AIDS-related knowledge, rating scale, psychometric properties, adolescence, Spanish.Abstract
El objetivo de este trabajo consistió en desarrollar y analizar las propiedades psicométricas de una escala multidimensional para evaluar los conocimientos relacionados con el VIH/SIDA en adolescentes (Escala de conocimientos sobre VIH/SIDA, HIV-KS). Tras un estudio piloto se administró un cuestionario de 48 ítems a una muestra de 14 centros escolares de 5 provincias españolas. Se puso a prueba la estructura teórica del cuestionario mediante un análisis de componentes principales al que se le aplicó un análisis confirmatorio. Se analizó la validez convergente y discriminante y la fiabilidad de la escala y, finalmente, se procedió a comprobar su invarianza factorial en función del género y la edad con una muestra de 1216 participantes. La versión final de HIV-KS estuvo compuesta por 10 ítems distribuidos en 3 factores principales. Los factores incluidos fueron (1) Transmisión oral del VIH, (2) Efectos del VIH, y (3) Otras vías de transmisión del VIH. La escala HIV-KS muestra invarianza en función del género y la edad y buena consistencia interna. HIV-KS es una escala capaz de evaluar de forma rápida y eficaz el grado de conocimientos sobre VIH/SIDA en población adolescente.
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Absctract
This paper aims to describe the development process, the factor structure, the reliability and validity of a multidimensional scale to measure HIV/AIDS-related knowledge for adolescents (HIV/AIDS Knowledge Scale, HIV-KS). After a pilot study of the items, a questionnaire of 28 items was administered to a sample from 14 different schools in 5 counties in Spain. Firstly, Principal-component analysis was used: first, to test a theory-driven structure and second, to develop an empirically derived factor structure for HIV-KS, which was tested with a confirmatory factor analysis. Secondly, reliability and convergent and discriminant validity were examined and finally, the factorial invariance was analyzed according to gender and age with a sample of 1,216 Spanish adolescents.
The final version of the HIV-KS consists of 10 items distributed across three major factors. The factors included are: (1) HIV oral transmission, (2) HIV effects, and (3) other HIV transmission methods. The HIV-KS is invariant across gender and age and shows good validity and internal reliability. HIV-KS is a capable and parsimonious self-report scale for assessing main aspects of HIV/AIDS-related knowledge for adolescents.
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