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Titolo:
Control of reflexive and voluntary saccades in the gap effect
Autore:
Craig, GL; Stelmach, LB; Tam, WJ;
Indirizzi:
Carleton Univ, Ottawa, ON K1S 5B6, Canada Carleton Univ Ottawa ON Canada K1S 5B6 n Univ, Ottawa, ON K1S 5B6, Canada Ctr Commun Res, Ottawa, ON, Canada Ctr Commun Res Ottawa ON CanadaCtr Commun Res, Ottawa, ON, Canada
Titolo Testata:
PERCEPTION & PSYCHOPHYSICS
fascicolo: 5, volume: 61, anno: 1999,
pagine: 935 - 942
SICI:
0031-5117(199907)61:5<935:CORAVS>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN EXPRESS SACCADES; MONKEY SUPERIOR COLLICULUS; DIRECTED VISUAL-ATTENTION; FIXATION POINT OFFSETS; REACTION-TIMES; EYE-MOVEMENTS; WARNING SIGNALS; LATENCY; DISENGAGEMENT; RANDOMIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Craig, GL Natl Res Council Canada, Inst Aerosp Res, Flight Res Lab, Bldg U-61,Uplands, Ottawa, ON K1A 0R6, Canada Natl Res Council Canada Bldg U-61,Uplands Ottawa ON Canada K1A 0R6
Citazione:
G.L. Craig et al., "Control of reflexive and voluntary saccades in the gap effect", PERC PSYCH, 61(5), 1999, pp. 935-942

Abstract

In two experiments, we examined whether voluntary and reflexive saccades shared a common fixation disengagement mechanism. Participants were requiredto perform a variety of tasks, each requiring a different level of information processing of the display prior to execution of the saccade. In Experiment 1, participants executed either a prosaccade or an antisaccade upon detecting a stimulus array. In Experiment 2, participants executed a prosaccade to a stimulus array only if the array contained a target item. The target could be a line (easy search) or a digit (difficult search). The criticalmanipulation in both experiments was the relative timing between the removal of the fixation stimulus and the onset of the stimulus array. In both experiments, it was found that saccadic latencies were shortest when the fixation stimulus was removed before the onset of the stimulus array-a gap effect. It was concluded that reflexive and voluntary saccades share a common fixation disengagement mechanism that is largely independent of higher levelcognitive processes.

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Documento generato il 10/07/20 alle ore 15:16:17