استخدام نموذج راش في تدريج مقياس التفكير البصري لدراسة بعض العوامل المؤثرة على دقة القياس وفق نظرية الاستجابة للمفردة

Abstract EN

The study aimed at developing Dimensional Visualizati using Ras Model,and creating the Scale norms.participants were 400 Students from faculty of Education Fayoum university ,ther age mean was 20.69 and SD was 0,894 and Norm s sample were 400 stadent with age levels:19,20,21 years.Material includes four subtests for copying test,every one includes, item,Winsteps(4.0.1)were used in performing the statistical.The Result Showed the following:the range of difficulty was from 1.194- to 4.87 logit,equivalent to to 40 to 69 MNF Deleting 18 participants from the calibration sample according to the unfit and outfit criteria the responses wer interpreted according the guessing and carelessness factors.

Deleting 9 items of the Dimensional Visualizati because some items are problematic and there were not valid.The number of scale item after calibaration using Rasch is (60) item.the tests proved to be valid and reliable and Calculating the scale norms.

Prepaing two equivalent sacle to measure the structure of the same variable Dimensional Visualizati