Duration perception can be affected by the oddness of stimuli. An oddball stimulus will be judged to have lasted longer than others of equal physical duration in a repeated series. It has been suggested that there are three main hypotheses to explain the subjective expansion of duration: attention hypothesis, arousal hypothesis and the neural coding efficiency hypothesis. The issues, such as variable confusion, the cross-modal effects and the time factors, are worth considering for future

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... s. Furthermore, no agreements are reached on the psychological and neural mechanisms of the subjective expansion of duration, and further explorations to these problems are of great significance to understand duration perception.