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基于速度与准确率权衡的深度认知诊断模型

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  • NETL
  • NSTL
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智能教育中,认知诊断通过分析学习者的学习行为数据来理解学习者的认知状态.现有基于深度学习方法的认知诊断模型默认假设学习者在作答过程中有足够的作答时间来完全发挥知识掌握水平,未考虑学习者在作答过程中的作答速度与作答准确率之间的权衡策略对发挥知识掌握水平的影响.针对上述问题,提出了一种基于速度与准确率权衡的深度认知诊断模型,首先构建认知风格模糊集解释学习者的权衡策略,然后通过动态逻辑回归函数模拟学习者作答过程中的速度与准确率权衡关系,实现对学习者理论上能达到最高的知识掌握水平与实际作答中发挥出来的知识掌握水平的区分诊断.此外还引入了作答时间属性和题目类型属性,以更准确地表征认知诊断交互函数中的题目参数.大量实验表明,该模型相比同类最优模型在3个公开数据集上准确度分别提升2.58％,2.86％,5.18％,且能为预测结果提供作答时间层面的解释,具有一定的优越性.
Speed-Accuracy Tradeoff-based Deep Cognitive Diagnostic Model
In intelligent education,cognitive diagnosis analyzes students'learning behavior data to understand their cognitive state.Existing cognitive diagnostic models based on deep learning methods assume by default that students have enough reaction time to fully exert the level of knowledge mastery during the response process,and do not consider the impact of the trade-off strategy between the speed and accuracy of student's response during the response process on the exertion of the level of know-ledge mastery.Aiming at the above problem,a deep cognitive diagnostic model based on speed-accuracy trade-off is proposed,which firstly constructs a cognitive style fuzzy set to explain the students'trade-off strategy,and then simulates the speed-accu-racy trade-off relationship in the process of the learners'response through the dynamic logistic regression function,so as to rea-lize the differentiated diagnosis of the students'theoretically highest level of knowledge mastery from the level of knowledge mastery they have played out in the actual response.In addition,the reaction time attribute and exercise type attribute are intro-duced to more accurately characterize the topic parameters in the cognitive diagnostic interaction function.Numerous experiments show that the model not only improves the accuracy by 2.58％,2.86％,and 5.18％compared to similar optimal models on the three publicly available datasets,but also provides a superior explanation of the prediction results at the level of response time.

Intelligent educationDeep cognitive diagnosticsSpeed-Accuracy trade-offFuzzy setsLogistic regression function

程艳、周子为、马明宇、林庆龙、詹勇鑫、万凌峰

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江西师范大学软件学院 南昌 330022

江西师范大学计算机信息工程学院 南昌 330022

江西省智能信息处理与情感计算省重点实验室 南昌 330022

智能教育 深度认知诊断 速度与准确率权衡 模糊集 逻辑回归函数

国家自然科学基金江西省科技创新基地计划项目江西省主要学科学术和技术带头人培养计划——领军人才项目江西省自然科学基金

621670062024SSY0313120213BCJL2204720212BAB202017

2024

10.11896/jsjkx.240300121

计算机科学
重庆西南信息有限公司（原科技部西南信息中心）

计算机科学

CSTPCD北大核心
影响因子：0.944
ISSN：1002-137X
年,卷(期)：2024.51(10)