The Effect Of Speed And Tennis Expertise On Motion-in-deep Perception: An Event-related Potential Study

In competitive sports movement in the scene,the athletes in the face of complex and changeable,especially the fast ball games,in order to achieve good performance,players will need to have good cognitive processing capacity.Sports psychologists believe that athletes' smart performance in completing difficult tasks lies in their sharp and quick cognitive processing ability,and they have cognitive processing advantages such as specialized perception,technical motion recognition and tactical perception decision-making.High-level ball players can always quickly extract effective visual information and make judgment,decision and execution quickly and accurately,among which depth motion perception is one of the most important sensory perception of ball players.Although there are many researches on visual perception in the field of sports specialty,the experimental evidence of deep motion perception is still lacking.In this study,we use the expert-novice task paradigm and ERP technology.14 tennis experts and 14 novices are selected,and the depth motion perception research paradigm is used to explore the depth motion perception response characteristics of tennis players and novices at different speeds,in order to find out whether there is a cognitive advantage of tennis players in depth motion perception and the reasons.The experimental process is to present the subjects with 3D video of small ball motion,simulate the process of deep motion,make the subjects make the close and far response.We record the behavioral response data and ERP data of the subjects,and compare the behavioral response differences and EEG characteristics of the two groups of individual deep motion perception.The results of behavioral study show that the accuracy of the judgment response when close is higher than that when faraway,and the response when close is higher than that when faraway.The faster the speed,the shorter the reaction time and the lower the accuracy.The EEG data shows that,(1)all the components of P1 in the occipital temporal region showed a significantly smaller amplitude when they were close to each other than when they were far away,and the latency period when they were close to each other was later than that when they were far away.The expert group activated an earlier and stronger response when they moved away,while the novice group did not.(2)both the N2 components in the occipital temporalregion showed a significantly smaller amplitude at close than at far,and the incubation period at close was later than that at far.(3)the incubation period of the expert group for the discovery of P2 components in the occipital area was significantly shorter than that of the novice group;The amplitude of P2 results that the faster the sphere moves away,the smaller the amplitude of P2,and there is no significant difference in the amplitude of motion close to the sphere.(4)the amplitude of P300 component that is close to is significantly smaller than that that is far away.Meanwhile,the faster the speed is,the larger the amplitude of P300 component that is induced,and the longer the incubation period is.Conclusion :(1)the motion speed of the sphere has a significant influence on the behavioral response of depth motion perception;The faster the ball moves,the faster the individual's response and the lower the accuracy.(2)the call process of attention resources in which the velocity of the sphere affects the perception of deep motion;No matter tennis experts or novices,the faster the ball moves,the faster attention resources can be called and more cognitive resources can be invested.(3)in the process of deep sports,tennis experts have expertise effect,which is mainly reflected in investing attention resources more quickly than novices.