the advantage of being left handed in interactive sports
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The advantage of being left-handedIn interactive sports
Norbert,H. (2009)Attention, Perception, & Psycholophysics, 71(7), 1641-1648.
• 證明左撇子在互動式運動具有優勢是因negative perceptual frequency effects 。
• 左撇子比例約為 10%-13% ,卻在互動式運動表現突出, (boxing,) 以網球為例。
• TOP 10 比例 male, 24.06%; female, 11.80% 。
• 大滿貫決賽 male, 22.27%; female, 18.75% 。
• 解釋左撇子優勢的理論• Earlier Explanations:1.Innate superiority hypothesis. (Geschwind and Gal- aburda 1987)2.Strategic advantage hypothesis. (Grouios, 2004; Grouios, Koidou,
Tsorbatzouidis, & Alexandris, 2002)
• Perception of Human Movements:1.Focus of orientation in the perception of
humanmovements. ( Pollick, Lestou, Ryu, & Cho, 2002)2. Side-specific perception of human
movements in sport. ( McMorris and Colenso 1996)
• Earlier Explanations:
• 1.Innate superiority hypothesis. (Geschwind and Gal- aburda 1987)
• 2.Strategic advantage hypothesis. (Grouios, 2004; Grouios, Koidou, Tsorbatzouidis, &
Alexandris, 2002)
Earlier Explanations:
• 1.Innate superiority hypothesis: Left-handers possess a neuropsychological
advantage. • 2.Strategic advantage hypothesis. They have a strategic or tactical advantage .
• Perception of Human Movements:
• 1.Focus of orientation in the perception of humanmovements.
( Pollick, Lestou, Ryu, & Cho, 2002)
• 2. Side-specific perception of human movements in sport.
( McMorris and Colenso 1996)
Perception of Human Movements
• 1.Focus of orientation in the perception of humanmovements.
-These studies assume that this sensitivity in distinguishing between different human movements depends on visual experience.
Perception of Human Movements
• 2. Side-specific perception of human movements in sport.
- This strong dependence on both visual experience and the horizontal orientation, it is proposed the sport-type-specific ability with the left hand is less well developed.
Perception of Human Movements
• Negative perceptual frequency effects hypothesis.
-The lower frequency with which athletes in interactive sports are confronted with movements by left-handed opponents.
Method
• Participants:
-108 males, 54 right-handers (RH) and 54 left-handers selected with the German version of the EHI .
-Divided into three groups by experience.
(experts,intermediates,novices)
Method
• Test Procedure
-The participants viewed videotaped sequences of tennis strokes on a laptop computer and had to predict the direction and depth of each stroke.
videotaped sequences
• Two left-handed and two right-handed.
• Twelve strokes (six groundstrokes, four volleys, and two serves) were recorded from each player. 加上鏡射呈現
• Total 96video clips. 受試者對於球的落點做預測,再以 radial error 計算誤差。
• federer.vs.nadal.wimbledon.2006.
• federer.vs.nadal.wimbledon.2007.
• federer.vs.roddick.wimbledon.2009.
Method
3 (group) × 2 (handedness of participant) × 2 (playing hand in video) × 2 (initial handedness of player in video)
mixed ANOVA.
Results
Results
Results
Discussion
• The ability to discriminate left-handed movement patterns is less well developed than that for right-handed movement patterns.
Discussion
• Does the Participants’ own Handedness exert an Influence?
• 以 Mirror neurons 來看 :
• A left-hander might be easier for a left-hander to discriminate than for a right-hander.
• 結果並非如此
Discussion
• Do the Movement Patterns of left-Handers Simply Mirror the Movements of Right-Handers?
• There should also be no interaction between the playing hand in video and initial handedness of player in video variables.
Discussion
• Negative perceptual frequency effect (see Faurie & Ray-mond, 2005) and can be assigned to the set of strategic advantages of left-handers in sport.
Discussion
• Automated decision preferences that are
generalized incorrectly from tactical play against right-handers.
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