Evaluation the reliability and validity of student's satisfaction questionnaire from training chairs

Given that the satisfaction from educational facilities and feel comfort and relax in classroom can affect on learning, focus and increase productivity, so the necessity for a questionnaire with appropriate validity and reliability to determine student's satisfaction from training chairs has been felt. therefor the aim of this study was to design and validate of student's satisfaction questionnaire from training chairs.
this descriptive study was performed in two phases of designing and considering the validity and reliability of satisfaction questionnaire and determining its cut point in 2016. to determine the content validity of questionnaire, CVR and CVI indices were used and to determine the external and internal reliability, test-retest method and cronbach's alpha were used. also ROC curve was used to assess the sensitivity, specificity and cut point.
content validity index was calculated 0.798 that is an acceptable nmber for questionnaire. cronbach's alpha was 0.799 and correlation between the questions in first and second series was in a acceptable significant level (r=0.825, p-value=0.000). in ROC diagnostic test, cut point was reported 35.5 with sensitivity and specificity 80.9% and 46.2% respectively and sub curve area in this cut point was 0.65.
according to this study's results, in investigating the validity and reliability indices of questoinnaire developed by the researcher was noted that this questionnaire have a proper validity and reliability to assess student's satisfaction from training chairs and can be used to assess any office and student chairs.