Estimacion de parametros en la tri: una evaluacion de bilog en muestras pequeñas

• Autores: José Antonio López Pina
• Localización: Psicothema, ISSN-e 1886-144X, ISSN 0214-9915, Vol. 7, Nº. 1, 1995, págs. 173-185
• Idioma: español
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• Dialnet Métricas: 2 Citas
• Resumen

  • En este informe presentamos un estudio de simulación para probar la exactitud de la estimación de parámetros de BILOG (V 3.04) con muestras pequeñas (50, 100, 250 y 500) y tests cortos (10, 20, 30 y 40) en grupos donde el test fue considerado difícil (µ? = -1), neutro (µ? = 0) o fácil (µ? = +1). La exactitud de las estimaciones de los parámetros de los items mejoró sustancialmente con el aumento del tamaño muestral. También, la exactitud de las estimaciones de los parámetros de habilidad mejoró sustancialmente conforme se incrementó la longitud del test. Además, la estimación del parámetro de discriminación fué independiente del grado de dificultad del test. No ocurrió igual con respecto al parámetro de dificultad o de habilidad, donde BILOG fué considerablemente más exacto en sus estimaciones cuando la dificultad media del test estuvo centrada sobre la habilidad media del grupo.

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