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RESEARCH ARTICLE

Sequential Aiming with Two Limbs and the One-Target Advantage

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Pages 325-330 | Received 18 Jan 2010, Accepted 20 Jul 2010, Published online: 08 Sep 2010
 

ABSTRACT

Movement times to the first target in a 2-target sequence are typically slower than in 1-target aiming tasks. The 1-target movement time advantage has been shown to emerge regardless of hand preference, the hand used, the amount of practice, and the availability of visual feedback. The authors tested central and peripheral explanations of the 1-target advantage, as postulated by the movement integration hypothesis, by asking participants to perform single-target movements, 2-target movements with 1 limb, and 2-target movements in which they switched limbs at the first target. Reaction time and movement time data showed a 1-target advantage that was similar for both 1- and 2-limb sequential aiming movements. This outcome demonstrates that the processes underlying the increase in movement time to the 1st target in 2-target sequences are not specific to the limb, suggesting that the 1-target advantage originates at a central rather than a peripheral level.

Notes

1. This assumption may be context specific. For instance, when the execution of the first movement compromises overall (upper) body balance, it may influence the execution of the second movement. The present task requirements, however, seem to rule out such influences.

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