In this study, using auditory sequences, the authors designed on examination with three phases of stimulus-driven attention that is based on the possibility that involuntarily time shafts of attention tire caused by nonunique stimulus properties. The purpose was to investigate whether attending and temporal expectancies tire influenced by stimulus's properties and by sex. In each phase, an auditory stimulus train was presented, and the participant was asked to tap rhythmically in order to anticipate every fifth stimulus (or, in the third phase, the lack of it). The time between button pressing and stimulus onset was measured using a computer. Time estimating was accepted as a false response if the subject responded before 150 ins or 150 ms later from onset stimulus time. Error numbers were greater in Phase 3 and there was no significant difference between the male and female subjects for any of the phases when error numbers were compared. On the other hand, males pressed the button more accurately than females. lime estimation performance was affected by sex and expectancy-related motor responses are very important for time estimation.