Abstract: Abstract: It is well known that human beings do not have the organs to feel time, but they often use the time information to adapt to the environment in daily life, which may mean that human beings have a certain time processing mechanism. Human beings, in life, can be a wide range of time, from tens of milliseconds to several decades. In the context of this time, the range of the duration cognitive mechanisms in milliseconds that are closely related to the life of the people is one of the focus of the researchers, such as playing basketball, playing music, etc.. Since the beginning of the eighty or ninety's in twentieth Century, researchers have gradually shifted the interest in the study of "duration" to "segmentation", and the emergence of two kinds of hypotheses: the non - segmental hypothesis and the hypothesis of segmentation. In the former, it is argued that there is no segmentation of time cognition, and the scalar timing model can be used to explain the different duration mechanism (Church, 1984). Second, time cognition exists segmentation, and the critical segmentation point may be involved in the 2~3s, 1setc. (Lewis, 2003; P?ppel, 1997). In recent years, there are many researches in the difference between the processing mechanism in 1 second and that more than 1 second (Cellini, Fabbri, Rammsayer, 2014.,et.al), but there is little researches in the duration cognition segmentation in 1 second ( Rammsayer & Lima, Rammsayer, 1991; &Ulrich, 2005). Based on this, this study continues to explore the segmentation of time in one second, which, the important theoretical significance is, not only helps to reveal the processing mechanism of time, but also provides important practical guidance for the practical activities of human, the practical significance is, using time information to adapt to the objective world. The time duration cognition segmentation means that the difference between the different processing mechanism and the representation is different. In the past, there were still differences in characteristic of the time cognition segmentation in 1 second in the past researches, so the study designed the experiment 1 and experiment 2. And in Experiment 1, dual task paradigm was used to investigate the selective interference between 100ms and 1000ms listening interval in mental arithmetic task. The results show that, mental arithmetic task affect the difference threshold of 1000ms listening interval, and the larger mental load is, the greater difference threshold is, but there is no influence on the listening interval difference threshold in 100ms. To verify the results of Experiment 1, experiment 2 used dual task paradigm to investigate the selective interference between 100ms and 1000ms viewing interval in mental arithmetic task. The results show that, mental arithmetic task affect the difference threshold of 1000ms viewing interval, and the larger mental load is, the greater difference threshold is, but there is no influence on the viewing interval difference threshold in 100ms. Two experiments show that the audio and visual interval cognition exist segmentation in 1 second.

Key words: duration cognition, segmentation, dual task paradigm, listening interval, viewing interval

摘要： 时距认知分段性指不同长度时距加工机制和表征方式不同。以往研究对1秒以内时距认知分段性仍存在分歧，为此在规避以往研究局限的基础上设计实验1和实验2。实验1和实验2分别采用双任务范式探讨心算任务对100ms和1000ms听、视时距比较的选择性干扰，结果表明,心算任务影响了1000ms听、视时距比较的差别阈限,心算加工负荷越大，差别阈限越大，但对100ms听、视时距比较的差别阈限没有影响。两项实验证明了1秒以内视、听时距认知均具有分段性。

关键词: 时距认知, 分段性, 双任务范式, 听时距, 视时距