Accurate time estimation is crucial when people recognize the motion state of objects in the environment or plan their own motion, but so far no brain structure has been found that specifically processes time information, and individual perception of time is also influenced by various factors, so objective time cannot be represented accurately. Currently, there are many theoretical models that explain the brain's processing mechanisms of time perception, but there is a lack of research that gives a unified explanation from the perspective of brain neural network information processing. Given that most of the information individuals encounter in daily life is visual motion information, this study aims to explore the effect of 2-3s time intervals on individual time perception using simple or complex visual motion stimulation and to improve the current time perception model.
This study designed a new duration discrimination task based on illusory motion perception and used experimental methods from psychophysics to study: (1) the key visual event attributes that affect time perception; (2) the effect of event density on time perception; (3) the effect of time and space information integration on time perception; (4) the effect of shape and direction features of biological motion on time perception. The current results show that: (1) spatial position is a key event attribute affecting time perception; (2) event density is closely related to time perception, whether simple or complex visual motion patterns are presented, increasing event density will cause the time perception to lengthen, and this rule remains effective under conscious level; (3) under the same event density conditions, the number of time and space information integrations affects time perception, the more integrations, the shorter the perceived time; (4) the shape features of biological motion affect time perception, and the greater the degree of destruction of spatial and temporal information, the shorter the perceived time. However, the direction of biological movement does not affect time perception; (5) Propose a new model of temporal perception.
We know that the projection from the retina to the visual cortex is strictly
topological, meaning that the relative position of the receiving information is maintained, and the neural network representation of visual motion information is achieved by delaying the integration of a series of spatial position information in the time dimension. Our research results indicate from multiple perspectives that time perception is closely related to the specific processing mechanisms of stimulus information in the brain's neural network. The individual's perceived time is not only related to the number of activated neurons, but also to the level of information processing. The more activated neurons, the longer the perceived time length, while the integration of spatial-temporal information shortens the perceived time. Based on the summary of our research results and by drawing on various theoretical models of time perception and existing neuroscientific evidence, this paper proposes a time perception model that conforms to the brain's information processing mechanism一the time consumption model. On the one hand, this model can explain multiple current experimental results, and on the other hand, it explains the possible time perception processing process from the perspective of neural circuits, providing a more specific approach to understanding the neural mechanisms of time perception.
修改评论