Aspectos metodológicos de la evaluación subjetiva de la carga mental de trabajo
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2001
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Societat Catalana de Seguretat i Medicina del Treball (SCSMT)
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Abstract
Objetivo: El objetivo de este trabajo es evaluar las propiedades psicométricas de tres instrumentos de medida subjetiva de la carga mental de trabajo: NASA-TLX, SWAT y WP.
Material y métodos: La muestra estuvo formada por 36 sujetos que realizaron dos tareas experimentales, de forma separada y simultáneamente. Las dos tareas experimentales fueron una tarea de búsqueda en la memoria de Sternberg y una tarea de seguimiento (tracking).
Resultados: Los resultados demostraron que: a) los tres instrumentos evaluados fueron sensibles a las manipulaciones realizadas en la dificultad de la tarea, revelándose la técnica WP como la mejor; b) el poder diagnóstico de WP y SWAT fue claramente superior al obtenido por TLX, y c) la validez convergente de los tres fue elevada
Objective: The present research evaluates several psychometric properties of three multidimensional subjective workload assessment instruments: NASA-TLX, SWAT and WP. Material and methods: Thirty six subjects performed two laboratory tasks separately and simultaneously. A discrete Sternberg memory task and a continuos tracking task were used. Results: The results showed that: a) the three instruments were sensitives to the difficulty task manipulations, but WP was the best; b) diagnosticity of WP and SWAT was clearly superior to the obtained using TLX, and c) convergent validity of the three instruments was elevated.
Objective: The present research evaluates several psychometric properties of three multidimensional subjective workload assessment instruments: NASA-TLX, SWAT and WP. Material and methods: Thirty six subjects performed two laboratory tasks separately and simultaneously. A discrete Sternberg memory task and a continuos tracking task were used. Results: The results showed that: a) the three instruments were sensitives to the difficulty task manipulations, but WP was the best; b) diagnosticity of WP and SWAT was clearly superior to the obtained using TLX, and c) convergent validity of the three instruments was elevated.