[Purpose] The purpose of this study was to examine the differences in visual search strategies between expert and novice badminton players while performing badminton serve. [Method] To this end, expert (more than 10 years experience) and novice (less than 6 months experience) badminton players performed 15 trials of two types of serve (i.e., short-serve and long-serve), in total 30 trials. All the participants’ eye movement was recorded during each trial, and mean fixation duration, fixation distribution, final fixation duration and location, and gaze entropy were analyzed. [Results] The results showed that there was no difference in mean fixation duration between expert and novice players. The analysis of mean fixation duration on each location showed that participants fixated more on the net while doing short serve whereas fixated more on the space when they did long serve. In particular, expert players fixated more on the space while doing long serve than novice players, and fixated more on the net and racquet for the short serve. However, novice players fixated more on the location of shuttle would be landed. The final fixation duration was not different between expert and novice players. Further, expert players showed higher gaze entropy than novice players. [Conclusion] The findings indicate that expert players fixated more on the net for the short serve, and the space for the long serve, and visual search strategies of experts were more varied than novice players.
PURPOSE This study investigated differences in gaze entropy according to skill level and temporal occlusion in table tennis serve reception. METHODS Study participants were divided into a skilled group (n = 6) and a novice group (n = 6). The study task involved sitting in front of a monitor while wearing an eye tracker, watching 36 serve videos, and predicting whether the ball’s length would be short or long by pressing the "Top" (short serve) or "Bottom" (long serve) pad on the selection response pad. RESULTS Overall, the later the temporal occlusion level, the faster the reaction time and the higher the judgment accuracy. At temporal occlusion levels 2 and 3, skilled participants showed higher judgment accuracy than novices. Analysis of heatmap and gaze entropy revealed that novices exhibited visual search toward the ball across all temporal occlusion levels (T1, T2, T3) and had high gaze entropy. In contrast, skilled participants generally showed visual search to the racket area depending on the temporal occlusion level, with low gaze entropy at T1 and T2, and a tendency for increased gaze entropy at T3. CONCLUSIONS Compared to novices, skilled participants had lower gaze entropy and fixated more on the racket area when predicting table tennis serves. Similarly, novices focused more on the ball than on the racket. The study also proposed the value of using heatmap and Shannon entropy for this type of analysis.
PURPOSE The main purpose of this study was to examine the difference in visual search strategies based on the skill level in success and failure cases in badminton short serves. METHODS To this end, six badminton experts (experience: more than 10 years) and six novices (less than 1 years) participated. The participants’ eye movement was recorded during each trial, and mean fixation duration, mean saccade amplitude, percentage of viewing time on each fixation location, final fixation duration, and gaze entropy were analyzed. RESULTS First, the mean fixation duration did not differ significantly, but the mean saccade amplitude increased when expert players failed to perform the serve successfully. Second, the percentage of viewing time on each location results showed that the overall viewing time was lower when the performance was unsuccessful, and the expert players fixated longer time viewing the net and space when they made a successful serve. Third, expert players showed longer QE than novice players when they made a successful serve. Finally, the gaze entropy results showed that expert players showed greater gaze entropy during successful performance, indicating that the gaze pattern was randomly distributed across trials. CONCLUSIONS When learning a badminton serve, we should fully recognize and explore the receiver’s location and external environment, and subsequently, before initiating serve movement, focus on the net or space between the receiver’s racquet and shoulders to make a more successful performance. In addition, we should make various patterns of the visual search strategy, rather than the fixed or consistent search strategy, to deceive receivers.
[Purpose] The purpose of this study was to investigate effects of baseball expertise and stimulus speeds on coincidence-anticipation timing accuracy of batting. [Methods] Participants were 21 baseball batters, 7 of Korea Baseball Organization(KBO) League, 7 of Korea Baseball Organization Futures League, and 7 of Korea University Baseball Federation(KUBF) League. All of the participants were asked to swing the bat exactly at the time when the light arrived the target point of the runway. The Bassin Anticipation Timer was used to present stimulus with stimulus speed of 10, 15, and 20mph. Participants performed 10, 15, 20mph trials (3 kinds of speed per 5 times) and random trials (3 kinds of speed per 3 times randomly). The timing error of coincidence anticipation task was recorded and raw scores were transformed to constant error(CE), absolute error(AE) and variable error(VE). For data analysis, two-way ANOVA with repeated measures were used. And post-hoc test (Tukey HDS) were conducted. [Results] Results indicated a significant interaction on expertise and stimulus speeds for CE, AE and VE. The KBO League players group showed more accurate and consistent performance than the KBO Futures League players group and the KUBF League players group in baseball batting timing. [Conclusion] This findings revealed that coincidence-anticipation timing accuracy batting in baseball can be used as a factor to distinguish the ability of the other.
Purpose The purpose of this study was to establish the differences of anticipating accuracy and confidence according to fencing expertise and spatial occlusion region. Methods For the purpose of this study, the anticipation ability of 6 high-level fencing players and 6 low-level fencing players were analyzed. All subjects performed the 60 tasks of anticipating the attack positions(thorax, thigh, toe) from observing the fencing video screen using spatial occlusion technique. The spatial occlusion technique was used in 6 particular body of opponent’s movement. For statistic analysis, data was analyzed through independent T-test measure. Moreover, Paired t-test were used as follow-up analysis. Results The results of the study were as follows: In terms of accuracy anticipation, the main effect of expertise was significantly different. Specifically, when the spatial occlusion technique was applied in head, left leg, arm, and a foil, the accuracy of anticipation was significantly different. Moreover, comparing with no-occlusion condition, anticipation accuracy decreased when spatial occlusion technique was applied in arm and foil. In terms of confidence, there was no significant difference between level of expertise. Conclusions In order to effectively anticipate the opponent’s movement in fencing sports, it is necessary to focus on the visual cues of arm/shoulder, and the foil. Especially, focusing on the foil movement might provide the core informations on anticipation ability.
The purpose of this research was to investigate the difference in decision making and perceived eye-focus location on peripheral vision and attacker's expertise in basketball tactical game. A total of twenty four subjects who were expert guard players (n=8), expert basketball center players (n=8), and novices (n=8), participated in this experiment. All subjects participated two tasks. The first task was to anticipate the attack direction after viewing a sequence of basketball tactic film. These films simulated three situations including offensive patterns. The three situations were consist of 3, 6, 9 degree peripheral vision. The second task was to express the level of confidence on their anticipation and to verbalize the perceived visual cues immediately after responding. For this research, an Eyelink eye movement system, an equipment for measuring anticipating, basketball tactic film were used. The variables on anticipation of attack direction were speed, accuracy, and the level of confidence. The acquiring process of advanced visual cues was examined through analyzing visual search strategies and perceived eye-focus location. In order to examine the difference in visual search, in decision making, and in perceived eye-focus locations as a function of expertise, data were analyzed through descriptive statistics, two-way ANOVA, and two-way MANOVA. This research had the following results. First, there was a significant difference on the search rate among the three groups. But, on the other hand, expert guard and center exhibited more fixations of shorter duration than the novices in the 6 and 9 degree condition. Second, results from the ratio of fixation time allotted to areas in the 3 degree condition revealed that experts spent more time fixating the ball-attacker(BA) than novices. The results from the ratio of fixation time allotted to areas in the 6 and 9 degree condition revealed that expert guard and center spent more time fixating the non-ball attacker(NBA) than novices. Expert guard also fixated longer on the pass attacker(PA) and meaning space(MS) than novices. Finally, experts paid attention to two or three locations simultaneously, whereas novices did to only one location such as the ball, attacker, defender, non-meaning space in all condition.
PURPOSE The current study examined how baseball fans evaluate a robot umpire from the perspective of the human-robot interaction. In particular, this study examined whether baseball fans evaluated more positively a robot umpire depending on whether a robot or a human umpire has the final authority to make ball-strike decisions, when the ball-strike decision contradicts with each other. Furthermore, the different types of expertise (baseball vs. image analysis) embedded in robot umpire and fans’ levels of technology adoption were used to examine the relationship between umpire type and evaluations of robot umpire. METHODS This study used 2 (final decision maker: robot vs. human umpire) by 2 (different types of expertise embedded in robot umpire: baseball vs. image analysis) by 2 (different levels of technology adoption: low vs. high) between-subjects design. RESULTS The results indicated that when a robot umpire had the final authority to make ball-strike decisions, baseball fans evaluated more positively the adoption of robot umpire, when image analysis expertise was embedded in the robot umpire rather than baseball expertise. Meanwhile, baseball fans evaluated more positively the adoption of robot umpire when baseball expertise was embedded in a robot umpire rather than image analysis expertise. CONCLUSIONS The current study provides meaningful implications regarding how to design an effective system for the operation of robot umpire in baseball.
PURPOSE This study aimed to explore the effective and pragmatic idea regarding the development of physical education teacher education (PETE) programs in China. These programs share both similarities and differences in China and Korea, and they are also discussed here. METHODS Six universities reflecting the regional specificities of Korea and China were selected following consultation with experts. Data collected through in-depth interviews, non-participatory observation, literature, and local documents were analyzed and interpreted by using the comparative analysis research method. RESULTS First, when comparing the curriculum, which was divided into liberal arts, major, and teaching subjects in both countries, the ratio of liberal arts and teaching subjects was similar in Korea following major subjects. As for China, major subjects came in first, followed by liberal arts and teaching subjects. Second, the relative pros and cons of preliminary sports teacher education in Korea and China were aimed at nurturing competent sports experts with both expertise and personality. They were generally similar in terms of content dimensions; however, they were found to be different in several areas. Particularly in the case of China regarding the teaching subject, practical subjects that were of pragmatic help to the school field were found to be relatively insufficient. Third, the implications for improving China's preliminary PETE were to emphasize the importance of personality in educational goals at the goal level, and as for the content level, it was necessary to replaced them with classes that could be of pragmatic use in the existing teaching method. Furthermore, at the methodological level, professional training of physical education teachers should be proposed, training them to cultivate character. Finally, more positive changes can be pursued if efforts at the environmental level are well-matched and improved. CONCLUSIONS To improve China's preliminary PETE program, it is necessary to enhance the environment and institutions using various teaching methods to cultivate expertise, such as practical aspects of university-field linkage and preliminary teacher personality education.
PURPOSE This study analyzed research on physical activities for elementary school students 1st and 2nd-graders to explore teachers’ perceptions and instructional practices in physical activity classes. METHODS Twelve studies published in academic journals conducted between 2000 to 2022 were selected for analysis. RESULTS The research articles were categorized into three domains: perception of physical activity in lower grades, operational features, and factors influencing practices from a didactic perspective. Challenges identified include dilemmas between curriculum documents and actual practice, a lack of practical teaching expertise, and a teaching culture discouraging physical activity in lower grades. Operational patterns were restructured into “avoidance-style classes,” “ad-hoc classes,” “textbook-dependent classes,” and “textbook-reorganization classes.” Factors influencing physical education for early elementary students included “teacher support factors,” “environmental factors,” and “administrative factors.” CONCLUSIONS In conclusion, this study advocates for policies that systematically improve perception, administration, and support classes for activating physical activities in lower elementary school students. The findings suggest the need for strategies such as adapting integrated curricula, creating training programs and educational materials, ongoing professional development activities for teachers, and specific research focused on physical activities for lower grade elementary students.
PURPOSE This study aimed to identify the dimensions of sport brand authenticity and to develop a valid and reliable scale for measuring such dimensions. METHODS Along with a sequential mixed method design, qualitative researches were conducted (a literature review on brand authenticity and the inherent value of sport, 5 one-to-one expert interviews, and a Delphi survey of 10 researchers). Based on the qualitative research results, an EFA (n=304), 2 times CFA (1st: n=304, 2nd: n=311), and correlation analysis using the other scale (brand relationship quality, brand attachment, brand credibility) were conducted to test reliability, construct validity, and criterion-related validity. RESULTS In the qualitative research results, 8 dimensions with 36 items were extracted; however 6 dimensions (originality, connectedness, legitimacy, authority, sport spirit, and expertise) with 28 items were identified as appropriate structures from EFA and CFA, and the relations between all the dimensions and other scales related to consumer attitude were statistically significant in the correlation analysis. CONCLUSIONS The findings suggest that the scale in this study could provide a new and specific perspective on sport brand authenticity, which is constructed using a general aspect and a sport specific aspect, and an understanding of the concept of sport brand authenticity in other sport industries.
