The Gaze Behavior and Defense Motion of National Hokey Goalkeeper in Field Hokey Penalty Coner and Stroke Task Seungmin Lee 1, Sang-Cheol Lee 2 *, Jong Seong An 3, & Chang Taiseok 4 1 Chungnam National University, 2 Korea Institute of Sport Science, 3 Seoul National University, & 4 Sungkyunkwan University
Fig. 1. eye tracking system for field hocky goalkeeper Fig. 2. Vision in Acton (VIA) system
Table 1. Goalkeeper s eye movement characteristics in penalty corner situation expertise Visual Fixation Time(Ave) Express saccade movement Gaze pursuit tracking eye tracking movement on set PlayerA 0.30±.03 38.44±2.88 59.25±3.21 0.15±.05 PlayerB 0.30±.06 35.16±4.56 62.65±4.55 0.18±.07 PlayerC 0.32±.10 33.25±6.64 65.25±6.54 0.14±.06 total 0.21±.07 37.28±3.41 62.05±3.54 0.16±0.3
Table 2. Goalkeeper s(a,b,c players) defensive movement variables in penalty corner situation (Unit: frames) P.C Total Success in defensive play Fail of defensive play Success Fail LT RT LB RB LT RT LB RB Feeder-stopper contact Stopper-shooter ball contact Shooter ball contact-release Goalkeeper s reaction time Delivery time for defensive action Player A 41.52±3 13.45±4.7 10.97±1.4 4±1.25 11.67±.82 Player B 37.57±1.9 11.15±5.1 13.27±2.58 4.91±1.42 12.36±.93 Player C 38.8±1.21 10.1±2.47 13.1±2.72 2.21±1.73 11.9±1.59 Player A 40.67±1.92 12.92±2.99 11±1.53 3.85±1.14 11.46±.66 Player B 38±.82 10.44±3.15 13.39±3.07 4.78±1.59 12.33±.69 Player C 38±.58 10.2±2.86 13.05±2.35 1.9±1.77 11.8±1.74 Player A 41.11±2.47 13.4±2.17 11±.82 4.7±1.25 11.5±.97 Player B 37±4.24 12.82±8.61 13.18±2.23 5.09±1.45 11.82±.6 Player C 39±1.63 10.36±2.01 13.64±4.03 2.18±1.4 11.64±1.36 Player A 39.83±1.72 14.29±3.2 11.57±1.62 3.43±.79 11.43±.79 Player B 37.5±.71 12.67±3.61 14.83±4.22 3.33±1.21 12.5±.55 Player C 39±0 10.33±2.25 13.33±2.5 1±.89 11.5±1.64 Player A 40.5±.71 12.5±3.54 10.5±.71 4.5±.71 12±0 Player B 39±0 8.2±2.28 13.6±2.41 5.2±.45 12.6±.55 Player C 38±0 8.57±2.64 14.14±2.04 2.29±1.5 12.14±1.95 Player A 43.5±2.12± 10.5±.71 10.5±2.12 5.5±.71 11.5±.71 Player B 0 10±2.83 12±1.41 4±1.41 11.5±.71 Player C 37.5±.71 11±2.16 11.75±1.71 1±.82 11.75±2.22 Player A 40.5±.71 11±0 10±1.41 3±1.41 11±0 Player B 38±0 10.2±2.17 12±2.24 6.4±1.14 12.2±.84 Player C 38±0 12.67±4.16 11.67±3.06 4±3 11.67±1.53 Player A 36±0 13±0 13±0 6±0 11±0 Player B 0 10.5±2.12 12.5±.71 4±0 11.5±.71 Player C 39±0 8.5±3.54 12.5±.71 2±0 13.5±.71 Player A 41.33±2.08 14.5±2.38 10.75±.5 4.75±.96 12.25±.96 Player B 0 15±0 11±0 6±0 12±0 Player C 0 0 0 0 0 Player A 42.67±1.53 12.67±2.52 10.67±.58 4±1.73 10.67±.58 Player B 37±4.24 13.29±10.9 14±2.38 5.14±1.68 11.86±.69 Player C 38±1.41 10.33±1.63 15±5.22 1.83±.75 11.33±1.21 Player A 41±1.41 12.5±2.12 11±0 5±1.41 11.5±.71 Player B 0 12±0 11±0 6±0 12±0 Player C 41±0 11.67±1.15 11.67±.58 3±2.65 11±1
Table 3. Goalkeeper s visual fixation variables in penalty stroke situation Subject Visual Fixation Location(%) Shoulder Leg Head Trunk Arm Stick End of Stick Ball Etc Player A 2.45±0.59 0 0 0.67±0.32 0.78±0.32 5.21±1.58 44.54±8.54 44.03±7.54 2.32±1.35 Player B 0.54±0.10 0 0 0 1.23±0.54 2.43±1.32 37.27±5.24 58.32±6.98 1.21±0.65 Player C 1.32±0.54 0 0 3.21±1.21 0 2.12±0.98 35.22±6.04 55.65±8.54 2.5±1.57 Total 1.43±0.32 0 0 1.29±0.87 0.67±0.87 3.25±1.25 39.10±6.98 52.67±7.35 2.01±1.20 Table 4. Goalkeeper s(a,b,c players) defensive movement variables in penalty stroke situation P.S Total Success in defensive play Fail of defensive play Success Fail LT RT LB RB LT RT LB RB Shooter ball contact-release Goalkeeper s reaction time Delivery time for defensive action Player A 2.75±.68 0.71±2.44 7.46±1.06 Player B 4.31±1.04 0.55±2.33 7.41±1.59 Player C 3.76±1.13 0.6±2.68 9.32±6.69 Player A 2.5±.58 1.25±1.71 7.5±1 Player B 3.8±.45 1.4±2.19 8.4±2.79 Player C 4±.58 1.29±2.93 10.57±2.58 Player A 2.76±.75 0.53±2.72 7.29±.69 Player B 4.42±1.1 0.38±2.24 7.21±1.22 Player C 3.86±1.41 0.79±2.69 7.93±1.14 Player A 2.67±.58 0.67±1.53 7±0 Player B 3.5±.71 3±1.41 7±0 Player C 4±0 0±0 9±0 Player A 0±0 0±0 0±0 Player B 0±0 0±0 0±0 Player C 4±0 1.33±3.21 8±1 Player A 0±0 0±0 0±0 Player B 4±0 0±2.83 11±2.83 Player C 3±0 6±0 8±0 Player A 2±0 3±0 9±0 Player B 4±0 1±0 6±0 Player C 4.5±.71-0.5±.71 13.5±4.75 Player A 2.6±.55-0.4±.89 7±1 Player B 4.25±.5-0.25±1.71 7.25±.96 Player C 4.17±2.04-0.33±2.34 7.83±1.33 Player A 2.57±.79 0±2.08 7.57±.53 Player B 4.75±1.5-1.5±1.29 8.75±.96 Player C 3±0 2±5.66 8±0 Player A 3±.82 2.5±4.73 7±0 Player B 4.6±1.35 0.8±2.25 6.6±1.17 Player C 4±.82 2.5±1.73 7.5±1 Player A 4±0 1±0 8±0 Player B 4±.63 1.33±2.58 7.17±.75 Player C 3.5±.71-0.5±.71 9±1.41 (Unit: frames)
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