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The Neural Mechanism of Number Processing Affecting Time Perception

Author: PuBin
Tutor: HuangXiTing
School: Southwestern University
Course: Basic Psychology
Keywords: Digital Processing Processing time Perceptual processing Decision-making stage Event-related potentials (ERP)
CLC: B842
Type: Master's thesis
Year: 2011
Downloads: 141
Quote: 1
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Abstract

Digital processing is a combination of coding on the characterization involved such as visual, visual-spatial and verbal and other factors. The perception of time is the individual acts directly on the sensory organs of the objective event continuity and sequential cognition. Perception is the time from when an important part of consciousness, reflecting the individual's short period of time (0-5s) appears objectively to an event persistent perception. Numbers, time and space with our lives, as a basic human cognitive function has attracted great interest from researchers. In particular, the relationship between the numbers and the time from the beginning of 1890, we get the attention of researchers in recent years, more and more research that cognitive systems in different numbers, and the existence of the interaction time. Oliveri, who found that, with the figures showing the time-distance carrier, will be equal to the subjective test point shifted. Presented as small numbers when shifted to the right from the point of subjective equality, while large numbers when presented offset to the left from the point of subjective equality. Such small numbers cause undervalued and overvalued due to the phenomenon of large numbers got a lot of researchers proof. Study found that changing the size of the number or range of materials such as language classes; second or 1-5 seconds under the time course; or to the number given background information, such effects are stable. Xuan et al use of ERP impact of this phenomenon by means of stage and neural mechanisms are discussed. The results showed that the CNV component, the small number of large volatility than large numbers. This result and the subsequent events related expectations. However, this study is flawed, one from the ERP results, the size of the figure in the early and late CNV N1 components there are differences in composition, that is, numbers may affect the time to judge the task throughout the entire decision-making from perception to recognize known process, but researchers believe that this effect stage at an earlier stage of perceptual processing. (2) Researchers believe CNV reflects the desired level of events did not occur. Compared to the large numbers of small numbers higher level of expectation. However, the experimental paradigm is numeric, and time simultaneously, while there, but disappeared (such as a digital 4 presents 800ms). Therefore, such an event does not occur for the existence of doubtful expectations. 3 times human task can process numbers and time information. And demonstrated sensitivity to a number higher than the time, a higher degree of automation of the processing. According to this conclusion, although the experiment participants were in the current task has nothing to do with numbers, just as attention to clues exist, but this process there is a digital processing. Oliveri found in time perception in the amount information is automatically activated, and the researchers interpreted as a difference between N1 perceptual identification number, which is perhaps a testament to the digital processing. Therefore, the existing studies may be mixed with the digital processing and time information processing, making the results do not accurately reflect the perception of digital right time to judge the impact of the task. Time segmentation integrated model emphasizes the human cognitive perception of time with segmentation, regardless of what kind of time are subject to a variety of factors from the cognitive effects; while Walsh's theory is that the number, number, time, space, three number of persons is a universal part of the system, a common mechanism of neural processing. According to these two models, this study intends to digital processing in the separation process under the conditions and time to explore the impact of the digital processing of the neural mechanisms of time perception. Research an inspection box (small probability) of time to judge whether it will be digital (high probability) of time to judge the impact of the task, the use of two sub-tasks, were asked to judge when a short distance close to the standard or the standard for a long time. It was found that in the digital stimuli, subjects will underestimate the small numbers showing time-distance and overestimate large time gap between the digital rendering. In the box under digital background stimuli, subjects will still underestimate the context of a small number from the box, and overestimate the context of large digital box from. Digital background factors that may interfere with the trial judge at the time. Study two in the study on the basis of a separation time digital processing and digital processing processing two factors of influence time processing neural mechanisms. Dual select oddball paradigm, subjects' task is a criterion stimulus (figure condition) and deviant stimuli (box condition) showing the length of time. It was found that in the digital group size numbers N1, P2 and CNV three ingredients differences were significant, but in the box CNV component group, only significant difference. The results show differences in the early component caused by the digital processing, and the difference between the late CNV component indicates the exclusion of the digital processing conditions, the number of time affect decision making level. This study suggests that the digital processing time perception influence decision-making process at the level of the stage, rather than perceptual processing level. In the time-phased integrated model under the guidance should be taken into account the physical characteristics of stimuli, cognitive factors and personality factors such as the impact on time perception.

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