development and evaluation of a new questionnaire for rating of cognitive failures at work

cognitive-based human errors have major contribution to performance and safety in working environment. this study designed to develop a measurement tool in order to evaluate this type of errors in the occupational settings. an occupational cognitive failure questionnaire (ocfq) was developed. content validity of the ocfq was performed using a quantitative approach. reliability of questionnaire was assessed by internal consistency and test-retest methods. a preliminary list of 35-items was prepared as a starting point. after evaluation of validity, five items were rejected. the new measurement instrument with 30-items was finally developed. the content validity index (cvi) for the final ocfq was found acceptable (cvi=0.7).  results show that final ocfq was internally consistent (α=96) and intraclass correlation coefficients (icc) was 0.99. measurement of cognitive failure in the workplace requires a valid and reliable tool. in respect to probable outcomes of cognitive failures occurrence at work, the present study suggested that ocfq would be a useful instrument for measurement of cognitive failure in the working environment.