The Cognitive Diagnosis Of High School Electrochemical Conceptual Understanding Based On Rule Space Model

Students correctly understand and master the chemistry concepts,is the most basic requirements of high school chemistry teaching.Electrochemical is one of the core knowledge of high school chemistry.If the students just know a little knowledge,it is impossible to really understand the knowledge.But at this stage,diagnosis of conceptual understanding only stay in the CTT phase,and can not probe the students' cognitive structure.Because these diagnosis focused on the overall evaluation but not individual students.This study was based on the Rule Space Model to diagnose students'understanding of electrochemical concepts and provide diagnostic reports for individuals and collectives.It tried to provide a feasible method for the evaluation of future conceptual understanding.First of all,this paper introduced the rule space model and its modeling process through the literature method,and defined the connotation of concept and conceptual understanding.Secondly,from the triple representation,the article determined the three kinds of process attributes of conceptual understanding in electrochemical.At the same time,according to the requirements of the new curriculum standards and the views of first-line senior teachers,this article clear the seven concepts of electrochemical concept understanding(redox reaction and energy conversion,device,the principle of the original battery,the principle of electrolytic cell,the original battery applications,electrolysis Pool application,the combination of integrated battery application)and its hierarchical relationship,and ultimately build high school electrochemical cognitive attribute model,and conducted a survey of the degree of recognition of the model by 18 first-line teachers.Then,on the basis of the hierarchical relationship of attributes,71 kinds of subjects were selected as the ideal reaction mode,and the project was compiled accordingly.According to the project inspection properties,this article encoded the project one by one.We listened extensively to the advice of experts and front-line teachers,and finally completed the diagnostic test volumes for the understanding of electrochemical concepts.The test volume examined 10 attributes,containing a total of 30 items and was used to diagnose the conceptual understanding of 200 high school students.Using the two-parameter logistic model,we use Matlab software to calculate the warning index reflecting the abnormal response of students,and establish the space of(?,?,and get 174 points to be classified and 71 pure points.This article used the minimum Mahalanobis distance to classify the subjects,and eventually 100%of the subjects were successfully classified into 29 ideal response patterns.According to the feedback information provided by the attribution category of the subjects,the collective and individual diagnostic reports and remedial strategies are developed,and the learning path graph is obtained by Boolean operation algebra analysis.At the same time,according to the situation of the students,from the "concept understanding" and "triple representation"two dimensions,put forward the concept of high school chemistry understanding of teaching recommendations.