Uyaran etkisi altında zaman algısı ve kalp hızı değişimi

Arousal is typically argued to dilate subjective time. As a process related to arousal Heart-Rate Variability (HRV) has been shown to be related to executive functions (EF), as well as temporal cognition. Higher resting-state HRV is linked to better performance on EF tasks and more accurate timing. Current study aims to reveal the electrophysiological marker of "dilation of time" by bringing a physiologically-based explanation. Phasic HRV during timing task can be affected by arousal manipulation. Specifically, the need for inhibition and self-regulatory effort due to arousal manipulation can lead to increased phasic HRV. In this study, we measured resting state HRV, and then employed a time-reproduction task with simultaneous cardiac signal recording after arousal manipulation. Arousal manipulation was applied by affective sounds with positive, negative and neutral sounds. Results showed no effect of valence on either behavioral timing performance or cardiac signals. There were no significant correlations between timing performance and baseline cardiac signals. There was a significant effect of duration on timing accuracy and precision. Short duration was reproduced with higher coefficient of variation (CV) and longer reproductions than target duration whereas longer reproductions were also apparent for medium duration without any effects on CV. Phasic HRV also differed significantly between test durations. Higher phasic HRV was observed for short duration compared to medium and long durations. This result suggests that self-regulatory activity and inhibition may manipulate performance on timing task for short durations under arousal conditions. Keywords: time perception, arousal, heart-rate variability, time reproduction