Research On Cognitive Diagnosis Of Precipitation Dissolution Equilibrium In High School Based On DINA Model

Traditional evaluation can get students’ scores,but it can’t get students’ mental thinking process.Psychometricians and cognitive psychologists have studied this question and developed cognitive diagnostic models.Cognitive diagnostic model（CDMs）is a psychometric model that get the process of students’ thinking.Different cognitive model combined with a Q matrix,different diagnostic information can be obtained.Among various cognitive diagnostic models,DINA model is simple.Most scholars are interested in DINA models.In high school,the content of precipitation and dissolution balance is closely related to life and production.Therefore,in order to help students learn this part of knowledge,This paper uses DINA model to diagnose students’ knowledge of precipitation solution equilibrium.The content of the research and innovation:Firstly,the cognitive attribute and hierarchical attribute relationship of precipitation and dissolution equilibrium are reasonably determined.Second,a test was developed.It can provide students with diagnostic information on the knowledge of precipitation dissolution equilibrium.The third,through the analysis of the students answer data,We obtained each student to master mode.Fourthly,the mastery patterns of all students are classified.Fifth,according to the diagnostic information of all participants come to a conclusion:1.The standard deviation of scores is relatively large,and there is a significant difference between students’ scores.2.80.4% of the total subjects were classified into the rational mastery mode.3.Most students do not master cognitive attributes,A5 and A6.4.The score is not the only standard to evaluate student.Based on these problems,some suggestions concerning teachers and students are put forward.Suggestions to the teachers:1.Fully excavate the teaching material,pay attention to the interpretation of the basic knowledge.2.Make reasonable use of mind mapping to help students sort out knowledge structure.3.Pay attention to the relationship between primary and secondary points clear things.4.Focus on reducing your mental workload in the future.