“…Reason, Manstead, Stradling, et al also showed a minimum 3-fold lower unsafe driving behavior frequencies [5], but they used a different version of the DBQ questionnare with different subscale that might make comparing the results difficult. In the present study, the mean OCF score was 28.9 and was similar to Allahyari, Saraji, Adl, et al's findings, which showed that the mean score of the CFQ was 27.9 [14]. The mean OCF score in the present study is lower than the mean cognitive failure reported by Wallace and Vodanovich [12], who measured the cognitive failure in relation to driving accidents (the mean score was 43.4) and Matthews, Coyle and Craig [25], who measured the cognitive error in relation to stress (the mean score was 45.0), but greater than the mean cognitive failure score reported by Larson, Alderton, Neideffer, et al [9].…”