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[摘要]：Intensity effect on interonset interval (IOI) timing perception was investigated in an event-related potential experiment by manipulating the onset and intensity of one tone in an isochronous sequence. The results revealed that lengthened IOI elicited a larger P3 than the shortened or standard IOI, suggesting that more attention should be focused because of an additional stimulation of temporally driven expectancy induced by an onset delay. Furthermore, P3 latency for IOI occurred later when preceding softer tones than when preceding louder or standard tones, implicating that softer tone might introduce a disturbance and impede the entrainment of high-level processing in the temporal perception. Importantly, louder accents reduced the sensitivity of shortened and standard IOIs, supporting the prediction of compensation hypothesis. NeuroReport 22: 749-752 (C) 2011 Wolters Kluwer Health | Lippincott Williams & Wilkins. |
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