A Cognitive Diagnosis Method For Polytomous Scoring With Multiple-Strategy

The rapid development of computer technology provides a guarantee for a large number of numerical calculation and data analysis,which has promoted the process of Computer-Assisted Instruction,Psychological statistics and measurement in the practical application direction.Cognitive Diagnosis(CD)is a new trend in the development of psychological statistics and measurement.It integrates contemporary theories of psychometrics and cognitive psychology.It is not a general ability evaluation of individuals(examinees),but according to the examinees responses of the items,base on the attributes measured by each item to diagnose the examinee's mastery of each attribute,and targeted(personalized / adaptive)to provide remedial measures for examinees.With the diversification of the form of the examination,the polytomous score test questions(such as calculation problems and essay questions)occupy an important position in the examination.The polytomous score items can provide more comprehensive and abundant measurement information and more detailed reflect the situation of the examinees' grasp of the tested attributes.Most of the Cognitive Diagnosis Models used in domestic and foreign literature are based on the single-strategy 0-1 scoring mode,there are few researches on multiple-strategy polytomous scoring mode.This paper proposes a new polytomous scoring with multiple-strategy Pattern Classification method(cognitive diagnosis method)based on GRM.Monte Carlo simulation experiments show that: in the polytomous scoring test if the answer strategy is not unique,The diagnostic results of the new method are much better than that of single-strategy diagnosis.For different answer strategies involving different attributes,the method also has high accuracy.