| Abstract [eng] |
Usually reaction time to stimulus onset is reported as shorter than reaction time to stimulus offset. When stimuli are of very short duration (less than 1 s), this difference in reaction time to stimulus onset and offset is explained by visual persistence. For stimuli of longer duration, longer reaction time to stimulus offset is explained by the suppression of automatically activated response to stimulus onset in reaction time to stimulus offset tasks. The aim of this research – to investigate the influence of response-related factors (foreperiod, action effect, premotor and motor reaction time parts and response type) on the difference between reaction time to stimulus onset and offset. With this purpose four experiments were performed. Results revealed that difference between reaction time to stimulus onset and offset depends on the duration of foreperiod – decreases as foreperiod increases, but only when the tasks of reaction time to stimulus onset and offset have different action effect. When action effect is equalized in both tasks, the difference between reaction time to stimulus onset and offset does not depend on the duration of foreperiod. Premotor time is shorter in reaction time to stimulus onset than in reaction time to stimulus offset tasks, but motor time does not differ between the tasks. Difference between reaction time to stimulus onset and offset is independent from mechanical response type. |
