The Cognitive Diagnosis Assessment On Spatial Ability Of Middle School Students Based On Polytomous Attributes Model

The Ministry of Education more and more pay attention to the all-round development of students' potential, The development of spatial abilityalso is importance, as an important part of intelligence structure. Therefore,it is become an important task that how to accurately assess the level of the students' space ability and promote the development of individual spatial ability.The Cognitive Diagnosis not only can provides a wealth of diagnosticmessages, but also can assess the situation of individual cognitive.This research for thiscontent on the high student spatial ability difficulties diagnosis.To students' spatial ability,it is important to solve the diagnosis is “cognitive components are identified”, then is the cognitive test is completed.Therefore,this study on thebasis of literature research, adoptthe achievements of Li Hongyu, chongde Lin,Gottwocognitivecomponents:spatialperception,spatialmemory,spaceimagination and spacethinking. According to the cognitive component and cognitive diagnosis theory, preparedthe test Q matrix and prepared the test item reference of the existing test. Compiled andmodified by geometry teachers. Three gradesrandomly selected were tested and got atest contains 39 questions. The are as follows:1.The test of The Cronbach's Alpha was 0.902,There was a high correlationbetween attributes of the diagnosis of the PA-DINAmodelandtheassessmentofthe Students' average geometry results,whichmeantthatthereliability and validitywas well.2.PA- DINAwas better than traditional DINA on validity and diagnosis results,Through the the diagnosis ofPA- DINA compared with DIAN model.So that the PA-DINAmodel is more suitable than the DINAmodelfor the test that have polytomous attributes.3According to the PA-DINA model,we got 152 species of master mode of spatial ability,Among them,24 of master model accounted for 50.6% of all master mode.We can find those related knowledge parts the students should consolidate because of the lack of some capacities.4.From the perspective of the overall situation of master of spatial ability,it was significant differences about the ability of the spatial perception, spatial memory, space imagination and space thinking in three grades.5.Besides the ability of spatialperception,there is no significant difference between male and female students in the development of the spatial ability?6.Students in the same level of the geometric achievement and different level of the geometric achievement are unevenly developed on spatial ability.The students have the same scores,but it doesn't mean they have the same master mode,in the meantime,the students have the same master mode does not mean that they can get a same score.7.The result of assessment based on cognitive diagnosis was better for cases analysis, which could provide more detailed assessment information, so as to serve targeted practice.