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Análisis de DIF con Grupos y Elementos de Anclaje Desconocidos

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Este resumen es generado por máquina.

Este estudio introduce un nuevo marco estadístico para el análisis de funcionamiento diferencial de ítems (DIF) cuando se desconocen tanto la información de subgrupos como la de elementos de anclaje. El método utiliza clases latentes y regularización L1 para identificar ítems DIF y estimar las diferencias entre grupos, mejorando la equidad en las evaluaciones.

Palabras clave:
funcionamiento diferencial de ítemslassoDIF latenteanálisis de clases latentesinvarianza de la medición

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Área de la Ciencia:

  • Psicometría
  • Modelado estadístico
  • Medición educativa

Sus antecedentes:

  • Garantizar la equidad en encuestas y pruebas es fundamental.
  • El análisis de funcionamiento diferencial de ítems (DIF) evalúa la invarianza de la medición a nivel de ítem.
  • Los métodos DIF tradicionales requieren grupos de comparación y elementos de anclaje conocidos, que a menudo no están disponibles.

Objetivo del estudio:

  • Proponer un marco estadístico general para el análisis DIF cuando se desconocen tanto los grupos de comparación como los elementos de anclaje.
  • Desarrollar un método que identifique simultáneamente subgrupos latentes y elementos DIF.
  • Proporcionar un algoritmo computacionalmente eficiente para resolver el modelo propuesto.

Principales métodos:

  • Un marco estadístico novedoso que modela grupos desconocidos a través de clases latentes.
  • Introducción de parámetros DIF específicos del ítem.
  • Un estimador regularizado L1 para identificar simultáneamente clases latentes y elementos DIF.
  • Un algoritmo de Expectation-Maximization (EM) computacionalmente eficiente para la optimización.

Principales resultados:

  • El marco propuesto maneja eficazmente el análisis DIF sin conocimiento previo de grupos o elementos de anclaje.
  • Los estudios de simulación demuestran el rendimiento del método.
  • El enfoque se aplicó con éxito a datos de pruebas educativas del mundo real.

Conclusiones:

  • El marco estadístico desarrollado ofrece una solución robusta para el análisis DIF en escenarios desafiantes.
  • Este método mejora la evaluación de la invarianza de la medición y la equidad en instrumentos educativos y de encuestas.
  • Los hallazgos contribuyen al avance de los métodos psicométricos para la detección de sesgos en los ítems.