집중방식이 이중과제 수행에 미치는 영향
The Effect of Attentional Focus on the Performance of Dual Task
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Studies of attentional focus effects, have shown that the performer’s attentional focus plays an important role in the performance and learning of motor tasks. We examined the influence of attentional focus on the performance of dual tasks (a postural task and a suprapostural task) and used electromyography (EMG) to examine whether the differences between external and internal focus were also manifest at the neuromuscular level. The subjects (n=40) stood on a balance board (postural task) and held a bar horizontally (suprapostural task). All of the subjects performed under different attentional focus conditions: external (balancer on balance board) or internal (feet) focus on the postural task, and external (balancer on bar) or internal (hand) focus on the suprapostural task. The mean displacement velocity of the bar and the percent reference voluntary contraction (%RVC) of the biceps brachii were reduced when the subjects adopted an external focus on the suprapostural task (p<.05). In addition, the mean displacement velocity of the balance board and %RVC of the tibialis anterior were reduced when the subjects adopted an external focus on the postural task (p<.05). When the subjects adopted an external focus on the suprapostural task, the mean displacement velocity of the balance board and %RVC of the tibialis anterior were also reduced (p<.05). When the subjects’ attentional focus was on the postural task, there were no differences in the mean displacement and %RVC of the biceps brachii between attentional focuses. The performance of each task was enhanced when subjects focused on the respective task. The suprapostural task goals had a stronger influence on postural control than vice versa. These results reflect the propensity of the motor system to optimize control processes based on the environmental outcome, or movement effect, that the performer wants to achieve.
Abstract
Studies of attentional focus effects, have shown that the performer’s attentional focus plays an important role in the performance and learning of motor tasks. We examined the influence of attentional focus on the performance of dual tasks (a postural task and a suprapostural task) and used electromyography (EMG) to examine whether the differences between external and internal focus were also manifest at the neuromuscular level. The subjects (n=40) stood on a balance board (postural task) and held a bar horizontally (suprapostural task). All of the subjects performed under different attentional focus conditions: external (balancer on balance board) or internal (feet) focus on the postural task, and external (balancer on bar) or internal (hand) focus on the suprapostural task. The mean displacement velocity of the bar and the percent reference voluntary contraction (%RVC) of the biceps brachii were reduced when the subjects adopted an external focus on the suprapostural task (p<.05). In addition, the mean displacement velocity of the balance board and %RVC of the tibialis anterior were reduced when the subjects adopted an external focus on the postural task (p<.05). When the subjects adopted an external focus on the suprapostural task, the mean displacement velocity of the balance board and %RVC of the tibialis anterior were also reduced (p<.05). When the subjects’ attentional focus was on the postural task, there were no differences in the mean displacement and %RVC of the biceps brachii between attentional focuses. The performance of each task was enhanced when subjects focused on the respective task. The suprapostural task goals had a stronger influence on postural control than vice versa. These results reflect the propensity of the motor system to optimize control processes based on the environmental outcome, or movement effect, that the performer wants to achieve.
참고문헌 (21)
- Adams JA, "A closed-loop theory of motor learning", J Mot Behav, 3(2), pp.111~149 (1971)
- Anderson JR, "The Architecture of Cognition" (1983), Harvard University Press
- Freedman SE, "Caligiuri MP, et al. Internal versus external: Oral-motor performance as a function of attentional focus", J Speech Lang Hear Res, 50(1), pp.131~136 (2007)
- Landers M, "An external focus of attention attenuates balance impairment in patients with Parkinson's disease who have a fall history", Physiother, 91(3), pp.152~158 (2005)
- Laufer Y, "Effect of attention focus on acquisition and retention of postural control following ankle sprain", Arch Phys Med Rehabil, 88(1), pp.105~108 (2007)
- Maxwell JP, "External versus internal focus instructions: Is the learner paying attention?", Int J Appl Sport Sci, 14, pp.70~88 (2002)
- McNevin NH, "Attentional focus on supra-postural tasks affects postural control", Hum Mov Sci, 21(7), pp.187~202 (2002)
- McNevin NH, "Increasing the distance of an external focus of attention enhances learning", Psychol Res, 67(1), pp.22~29 (2003)
- Poolton JM, "Benefits of an external focus of attention: Common coding or conscious processing?", J Sport Sci, 24(1), pp.89~99 (2006)
- Raymakers JA, "The assessment of body sway and the choice of the stability parameter(s)", Gait Posture, 21(1), pp.48~58 (2005)
- Riley MA, "Postural stabilization for the control of touching", Hum Mov Sci, 18, pp.795~817 (1999)
- Shea C, "Enhancing motor learning through external-focus instructions and feedback", Hum Mov Sci, 18(4), pp.553~571 (1999)
- Stoffregen TA, "Modulating postural control to facilitate visual performance", Hum Mov Sci, 19(2), pp.203~220 (2000)
- Vance J, "EMG activity as a function of the performer's focus of attention", J Mot Behav, 36(4), pp.450~459 (2004)
- Vereijken B, "Free(z)ing degrees of freedom in skill acquisition", J Mot Behav, 24(1), pp.133~142 (1992)
- van Vliet PM, "Extrinsic feedback for motor learning after stroke: What is the evidence?", Disabil Rehabil, 28(13-14), pp.831~840 (2006)
- Wulf G, "Instructions for motor learning: Differential effects of internal versus external focus attention", J Motor Behav, 30(2), pp.169~179 (1998)
- Wulf G, "The learning advantages of an external focus of attention in golf", Res Q Exerc Sport, 70(2), pp.120~126 (1999)
- Wulf G, "Directing attention to movement effects enhances learning: A review", Psychon Bull Rev, 8(4), pp.648~660 (2001)
- Wulf G, "Reciprocal influences of attentional focus on postural and suprapostural task performance", J Motor Behav, 36(2), pp.189~199 (2004)
- Zachry T, "Increased movement accuracy and reduced EMG activity as the result of adopting an external focus of attention", Brain Res Bull, 67(4), pp.304~309 (2005)