The Study Of The Movement Of Eyes For Teenager Female Tennis Athletes' Prejudgment With Different Levels Before Hitting The Ball

Teenagers' inaccurate prejudgment to the ball directly affects their effect of hitting the ball.Prejudgment has become an important factor to improving their quality of hitting the ball.The inaccurate prejudgment to the ball or the unstable prejudgment affects them hitting the ball while moving can directly influence the advancement of teenagers' skill.Hence,the training of prejudgment capability is very essential at teenager stage.I'd like to choose teenager tennis sportsmen to have a research.The paper adopts expert-novice group paradigm to select professional group including 20 people from Tianjin youth tennis athletes,by using the method of literature,expert interview method,experimental method,mathematical statistics method,logical analysis method,and the professional group contains tennis players of first and second class.And the paper selects 20 amateur tennis players in Tianjin as amateur group.Meanwhile,the eye movement system was used to collect the related eye movement data to compare the difference of the eye movements,such as the behavioral index,the eye movement index and the fixation track between the professional group and the amateur group.It provides a theoretical basis and practical basis for improving tennis players' hitting quality in China.The results show that:1.The study selected the professional group and the amateur group as the subjects.The experimental results showed that the accuracy of professional group was higher than the amateur group,which showed that the professional tennis players were more accurate in the process of tennis prejudgment in the confrontation situation,while the amateur tennis players had a lower accuracy in the course of the tennis prediction(P<0.001),but the time of professional group was shorter than the amateur group and the former one's correct rate is higher.2.In the analysis of eye movement difference between the professional group and the novice,the professional group and the amateur group had a significant difference in the number of gaze in the chest,arm,waist and leg interest area,but there was no significant difference in the number of eyes in the interest area in the head.During the eye movement analysis of the right and wrong response between the professional group and the novice group,the professional group paid more attention to the arm when in the correct response,while there was no difference in the fixation point of the amateur group.So the professional group has more times to gaze the chest,arms,waist and legs,especially the prejudgment to the arm parts.3.The comparison and analysis of fixation trace between the professional group and the amateur group show that most of the professional group concentrated on the opponent's body when they made visual search for the presentation material.As for the amateur group,most of the fixation points are scattered around the opponent's body.So the focus points of the professional group athletes are more concentrated and regular than the novice group.