Attenuating the Effect of Sensory Modality on Time Perception
Subject Areas :محمدعلی نظری 1 , حسن صبوری مقدم 2 , رضا خسرو آبادی 3 , حسین سپاسی مقدم 4 * , سید شهریار عرب 5
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Abstract :
In psychophysics domain, various factors have been studied as the main account of the time contraction after stimulus repetition and the time expansion after a novel stimulus; however, there is no clear explanation about the amount of involvement of temporal and non-temporal features. In this study, 48 sub-jects participated in 3 experiments in which the purer role of temporal properties of stimului were examined. Data were provided by a tem-poral oddball paradigm and the analysis was implemented by repeated measures analysis of variance in experiments 1 and 3. In experiment 2, a psychometric function was used to deter-mine the modified estimations in temporal pro-cessing system. Findings showed that despite removing the non-temporal change in expe-riment 1, the temporal change between repea-ted/non-repeated stimuli can produce time con-traction and dilation respectively. The result was only for the auditory system. In experi-ment 2, an efficient threshold for temporal oddball was suggested. Using the updated threshold, experiment 3 revealed concordant repeated/non-repeated effects on time percep-tion in both modalities.