Psychometric Adequacy of The Persian Version of The DELES questionnaire to evaluate the educational environment of environment of IUMS

The assessing of distance education learning environments is the key to high-quality student-centered curriculum. A comprehensive, valid and reliable tool is essential in order to lead such evaluation. One of the patterns to measure the learning environment is DELES (distance education learning environments survey) measurement tool which is a specialized questionnaire to assess distance learning environment setting.
This is a descriptive and analytic study. The study population is the distance medical education students of Iran University of medical science in master of sciences. The method of collecting data on the implementation of this project was census sampling method and the sample size included 150 students. Content and face validity was evaluated with 20 experts familiar with clinical education and structural validity evaluated using factor analysis method. Reliability stability was assessed through test - retest and internal consistency reliability was measured using Cronbach's alpha co-efficiency and whole data analyzed using SPSS 16 Software.
The DELES Questionnaire with an average score of 77.10 ± 17.8 (64%) of 120 was obtained good rating in the assessment. The content validity of the questionnaire was confirmed. Average content validity of the ratio (CVR) 0.30 was calculated, and 12 questions eliminated at this stage. Content validity of the Index (CVI) was calculated 0.42. In exploratory factor analysis of KMO, 0.856 was achieved, and the Bartlett test was significant: (p≤0.0001) Seven factors were confirmed that basis of a few questions was changed (coverage of variance=73.739%). Cronbach's alpha coefficient of the questionnaire was 0.937.
The modified "DELES" Questionnaire in Persian language including 30 questions was presented with appropriate psychometric conditions that could be applied to assess distance education learning environments in medical education students of our country.