The developmental roots of the speed-accuracy trade-off |
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Authors: | Zaal Frank T J M Thelen Esther |
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Affiliation: | Department of Psychology, Indiana University, IN, USA. f.t.j.m.zaal@rug.nl |
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Abstract: | The speed of adult reaching movements is lawfully related to the distance of the reach and the size of the target. The authors had 7-, 9-, and 11-month-old infants reach for small and large targets to investigate a possible relation between the emergence of this speed-accuracy trade-off and the improvements in infants' ability to pick up tiny objects. By 7 months of age, infants slowed down their reaches for smaller objects. The authors concluded that it was not the ability to use a precision grip that facilitated the speed-accuracy trade-off but rather the other way around. The slowing down toward the end of the movement might set the conditions for the development of fine distal control of the hand. |
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