Abstract: Interval timing perception is vulnerable to emotion, which can result in the deviation of perceived duration from actual. Recently, based on maturing scalar timing model and related neurological evidence, also the use of standardized emotion-induced materials, researchers provide a better understanding in two arousal effects of emotion: of physiology and of attention, both of which affect the processing of duration. According to the research, the former effect may increase perceived duration while the latter may decrease it, with different characteristics respectively in the process. This article gives a survey to the latest researches on emotional effects in timing perception. And three supplements, namely, seeking methods to distinguish the two effects, taking the memorial factors into account and increasing variable level and number during the research, are proposed to support further study

Key words: emotion, interval timing perception, physiological arousal effect, attention arousal effect