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Profundizando en el Modelado Diagnóstico: Modelos Cognitivos Diagnósticos Profundos (DeepCDM)

Yuqi Gu1

  • 1Columbia University.

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Resumen
Este resumen es generado por máquina.

Presentamos los Modelos Cognitivos Diagnósticos Profundos (DeepCDM), un enfoque novedoso que mejora la medición educativa. Los DeepCDM ofrecen una mejor identificabilidad, parsimonia e interpretabilidad para diagnosticar habilidades cognitivas.

Palabras clave:
inferencia bayesianared bayesianaDeepCDMmatriz Qmodelo cognitivo diagnósticomodelo generativo profundoaprendizaje profundomodelo gráfico dirigidoidentificabilidad

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Área de la Ciencia:

  • Medición Educativa y Psicometría
  • Aprendizaje Automático
  • Inteligencia Artificial

Sus antecedentes:

  • Los Modelos Cognitivos Diagnósticos (CDM) se utilizan ampliamente en la medición educativa y psicológica para el modelado de variables latentes discretas.
  • Los CDM existentes enfrentan desafíos en la identificabilidad, parsimonia e interpretabilidad, particularmente en escenarios de diagnóstico complejos.
  • El modelado generativo profundo ofrece ventajas potenciales para capturar estructuras de datos intrincadas y mejorar las propiedades del modelo.

Objetivo del estudio:

  • Proponer una nueva familia de Modelos Cognitivos Diagnósticos Profundos (DeepCDM) integrando el modelado generativo profundo con los principios de CDM.
  • Abordar las limitaciones de los CDM tradicionales mejorando la identificabilidad, la parsimonia y la interpretabilidad en el diagnóstico cognitivo.
  • Desarrollar métodos teóricamente sólidos y prácticamente aplicables para el modelado diagnóstico discreto profundo.

Principales métodos:

  • Se introdujeron los DeepCDM, una nueva clase de modelos que aprovechan las arquitecturas generativas profundas para el diagnóstico cognitivo.
  • Se establecieron condiciones matemáticas para la identificabilidad de los DeepCDM, incluida la identificación única de parámetros y matrices Q en todas las profundidades.
  • Se desarrollaron formulaciones bayesianas y algoritmos eficientes de muestreo de Gibbs para la estimación de parámetros en el entorno confirmatorio con matrices Q conocidas.

Principales resultados:

  • Se demostró que los DeepCDM son completamente identificables, incluso en entornos exploratorios, determinando de forma única los parámetros y las matrices Q.
  • Se mostró la parsimonia estadística de los DeepCDM, lo que permite un modelado de datos expresivo con menos parámetros debido a la profundidad del modelo.
  • Se destacó la interpretabilidad práctica de los DeepCDM, con una arquitectura profunda que facilita el diagnóstico de habilidades multigranularidad, de gruesa a fina.

Conclusiones:

  • Los DeepCDM representan un avance significativo en el modelado cognitivo diagnóstico, ofreciendo una mejor identificabilidad, parsimonia e interpretabilidad.
  • La metodología propuesta proporciona un marco sólido para el modelado diagnóstico discreto profundo con condiciones de identificabilidad transparentes.
  • La evidencia empírica de simulaciones y la aplicación a datos de TIMSS 2019 confirman la utilidad y eficacia de los DeepCDM.