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Titolo:
The Gap effect for spatially oriented responses
Autore:
Pratt, J; Bekkering, H; Abrams, RA; Adam, J;
Indirizzi:
Univ Toronto, Dept Psychol, Toronto, ON M5S 3G3, Canada Univ Toronto Toronto ON Canada M5S 3G3 ychol, Toronto, ON M5S 3G3, Canada Washington Univ, Dept Psychol, St Louis, MO 63130 USA Washington Univ St Louis MO USA 63130 ept Psychol, St Louis, MO 63130 USA Max Planck Inst Psychol Res, D-80802 Munich, Germany Max Planck Inst Psychol Res Munich Germany D-80802 80802 Munich, Germany Maastricht Univ, Dept Movement Sci, NL-6200 MD Maastricht, Netherlands Maastricht Univ Maastricht Netherlands NL-6200 MD aastricht, Netherlands
Titolo Testata:
ACTA PSYCHOLOGICA
fascicolo: 1, volume: 102, anno: 1999,
pagine: 1 - 12
SICI:
0001-6918(199907)102:1<1:TGEFSO>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIXATION POINT OFFSETS; SACCADIC EYE-MOVEMENTS; SUPERIOR COLLICULUS; EXPRESS SACCADES; HAND MOVEMENTS; MACAQUE MONKEY; LATENCY; FACILITATION; DISENGAGEMENT; LESIONS;
Keywords:
eye movements; visual fixation; perceptual-motor coordination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Pratt, J Univ Toronto, Dept Psychol, 100 St George St, Toronto, ON M5S 3G3, Canada Univ Toronto 100 St George St Toronto ON Canada M5S 3G3 3, Canada
Citazione:
J. Pratt et al., "The Gap effect for spatially oriented responses", ACT PSYCHOL, 102(1), 1999, pp. 1-12

Abstract

The gap effect refers to the finding that a temporal gap between fixation point offset and target onset typically results in shorter saccadic latencies than if the fixation point remains on. Recently, this gap effect was found for aimed hand movements as well as saccadic eye movements, but not for simple keypress responses. In order to examine the hypothesis that the handgap effect occurs for different types of spatially oriented movements, twoexperiments were conducted. In the first experiment, subjects produced spatially oriented responses to a peripheral target and the target location was known in advance of the targets presentation. This spatially oriented detection task yielded gap effects for both eye and hand responses. In the second experiment, the duration of the temporal gap was varied between 0-400 ms. The duration of the temporal gap had similar effects on the magnitudes of both the eye and hand gap effects, suggesting that a common mechanism mayunderlie the gap effect for saccadic and manual pointing movements. Overall, the results of the present experiments confirm the finding of a gap effect for spatially oriented hand movements and suggest that this effect may be related to the functioning of the superior colliculus. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 21/09/20 alle ore 12:53:52