Consulta: subjectFacets:"Gap effect"
Registros recuperados: 2
Data/hora: 03/06/2024 16:43:20

Gap effect and reaction time distribution: simple vs choice manual responses
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Machado-Pinheiro,W.; Gawryszewski,L.G.; Ribeiro-do-Valle,L.E.
It is well known that saccadic reaction times (SRT) are reduced when the target is preceded by the offset of the fixation point (FP) - the gap effect. Some authors have proposed that the FP offset also allows the saccadic system to generate a separate population of SRT, the express saccades. Nevertheless, there is no agreement as to whether the gap effect and express responses are also present for manual reaction times (MRT). We tested the gap effect and the MRT distribution in two different conditions, i.e., simple and choice MRT. In the choice MRT condition, subjects need to identify the side of the stimulus and to select the appropriate response, while in the simple MRT these stages are not necessary. We report that the gap effect was present in both...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Attention; Reaction time; Gap effect; Vision; Express responses.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998001000012

Inhibition of return, gap effect and saccadic reaction time to a visual target
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Guimarães-Silva,S.; Gawryszewski,L.G.; Portugal,T.S.; Klausner-de-Oliveira,L.
Simple manual reaction time (MRT) to a visual target (S2) is shortened when a non-informative cue (S1) is flashed at the S2 location shortly before the onset of S2 (early facilitation). Afterwards, MRT to S2 appearing at the S1 location is lengthened (inhibition of return - IOR). Similar results have been obtained for saccadic reaction time (SRT). Moreover, when there is a temporal gap between offset of the fixation point (FP) and onset of a target (gap paradigm), SRT is shorter than SRT in an overlap paradigm (FP remains on). In the present study, we determined SRT to S2 (10º) after presenting S1 at the same eccentricity (10º) or at a parafoveal position (2º) in the same or in the opposite hemifield. In addition, we employed both gap and overlap...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Visual attention; Saccadic reaction time; Inhibition of return; Covert orienting; Gap effect.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400010