Speed of processing (SOP) is a crucial factor in fluent reading and is measured using reading rate. This measure is commonly used to examine correct reading patterns, yet in the present study it is employed to determine whether differences in SOP exist for correct and incorrect reading. One of the characteristics of dyslexia is slow and inaccurate reading. Thus, the aim of the present study was to compare the processing time and accuracy of dyslexic and regular readers when performing errors during letter, word and sentence reading. Both groups exhibited longer reaction times for incorrect response but the dyslexics were significantly slower. Furthermore, both groups were less accurate and faster when recognizing letters as compared with reading sentences. These data suggest that incorrect responses among dyslexics follow their attempt at stimulus processing rather than impulsivity. In addition, it is suggested that the difference in the task's cognitive demands affects performance. (Contains 2 tables.)