The groups did not differ in the detection or matching accuracy (p = 0.332; without using years of education as a covariate p = 0.454). All subjects made more errors of omission than commission [F (1, 26) = 5.92; p = 0.022], but there were no group differences in the number of either type of error committed (p = 0.523; Table 2.) There was neither a significant difference between the number of response errors made with the right (S response) and the left (H response) hand (p = 0.093) nor a group difference in these measures (p = 0.977). Table 2Accuracy and error type countGroupAccuracyError typesOmissionCommissionControlMean0.845028SD0.042518AlcoholicMean0.864127SD0.092931
