基于认知诊断的个性化英语在线听力诊断模型构建

CDA-based EFL Listening Diagnostic Modelling:Towards Personalized Online Diagnoses

如何挖掘语言测评中学习者个人的潜在差别以便为他们提供“量身定制”的教学指导,这是语言研究者一直致力于回答的具有挑战性的问题,本文旨在探讨如何运用认知诊断方法构建英语听力诊断模型,为研发“个性化英语学习指导系统”的听力诊断评估做准备,与传统测试评估相比,认知诊断评估能提供颗粒度更细的被试的知识状态和认知加工过程,有助于解决以上问题,依据认知诊断的方法,该诊断模型的构建过程首先是确定听力理解的属性,然后构建假设诊断模型Q矩阵和诊断试题,最后通过认知诊断G-DINA模型专设软件验证假设Q矩阵模型的拟合度,通过定性和定量验证,假设的Q阵模型与被试作答拟合良好,可提供可靠的诊断反馈,由此获得学习者个体对听力理解掌握的潜在优势和不足,可用于初步的网络在线诊断。

How to identify learners'latent individual differences in language assessment so as to provide them with“tailored”instruction is a challenging question that language researchers and teachers are endeavouring to answer.This study aims at constructing an EFL listening diagnostic model based on the theory of Cognitive Diagnostic Assessment(CDA).The ultimate goal is to make it ready to be used in a personalized online EFL learning diagnostic system.Compared with the traditional classical assessment,CDA can offer fine grained feedbacks on the learner's knowledge structure and cognitive process.The diagnostic test moelling starts with the identification of EFL attributes relevant to listening comprehension,followed by the hypothetic Q matrix model and diagnostic test design,and finally,a psychometric G-DINA model analysis.Through both qualitative and quantitative validation,the bypothetic diagnostic model proves to be good enough to offer reliable preliminary diagnos tic feedbacks,where individual learners'potential strengths and weaknesses in listening comprehension can be easily identified,and is therefore qualified for personalized online diagnostic purposes.