Consulta: creatorFacets:"Faria Jr.,A.J.P."
Registros recuperados: 2
Data/hora: 11/06/2024 07:00:24

Experimental context modulates warning signal effects
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Machado-Pinheiro,W.; Faria Jr.,A.J.P.; Gawryszewski,L.G.; Ribeiro-do-Valle,L.E.
Previous studies have shown that saccadic eye responses but not manual responses were sensitive to the kind of warning signal used, with visual onsets producing longer saccadic latencies compared to visual offsets. The aim of the present study was to determine the effects of distinct warning signals on manual latencies and to test the premise that the onset interference, in fact, does not occur for manual responses. A second objective was to determine if the magnitude of the warning effects could be modulated by contextual procedures. Three experimental conditions based on the kind of warning signal used (visual onset, visual offset and auditory warning) were run in two different contexts (blocked and non-blocked). Eighteen participants were asked to...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Reaction times; Attention; Distractor; Preparation; Expectancy.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000700016

Looking for the GAP effect in manual responses and the role of contextual influences in reaction time experiments
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Faria Jr.,A.J.P.; Machado-Pinheiro,W.
When the offset of a visual stimulus (GAP condition) precedes the onset of a target, saccadic reaction times are reduced in relation to the condition with no offset (overlap condition) - the GAP effect. However, the existence of the GAP effect for manual responses is still controversial. In two experiments using both simple (Experiment 1, N = 18) and choice key-press procedures (Experiment 2, N = 12), we looked for the GAP effect in manual responses and investigated possible contextual influences on it. Participants were asked to respond to the imperative stimulus that would occur under different experimental contexts, created by varying the array of warning-stimulus intervals (0, 300 and 1000 ms) and conditions (GAP and overlap): i) intervals and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reaction times; Attention; Preparation; Expectancy; Contextual influences.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000800007