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	Provedor de dados BJMBR (4) Autor Machado-Pinheiro,W. (4) Faria Jr.,A.J.P. (2) Gawryszewski,L.G. (2) Ribeiro-do-Valle,L.E. (2) Nepomuceno,F.V.P. (1) Oliveira,L. (1) Pereira,M.G. (1) Pessoa,L. (1) Rodrigues,J.A. (1) Volchan,E. (1) Mais... Palavra-chave Attention (3) Expectancy (2) Preparation (2) Reaction time (2) Reaction times (2) Affective stimulus (1) Behavior (1) Contextual influences (1) Distractor (1) Emotion (1) Express responses (1) Gap effect (1) Sex differences (1) Vision (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Info:eu-repo/semantics/other (2) Ano 2004 (3) 1998 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Behavioral modulation by mutilation pictures in women BJMBR Pereira,M.G.; Volchan,E.; Oliveira,L.; Machado-Pinheiro,W.; Rodrigues,J.A.; Nepomuceno,F.V.P.; Pessoa,L.. Previous studies have shown that women are more emotionally expressive than men. It is unclear, however, if women are also more susceptible to the emotional modulation of behavior imposed by an affective stimulus. To investigate this issue, we devised a task in which female subjects performed six sequential trials of visual target detection following the presentation of emotional (mutilation and erotic) or neutral pictures (domestic utensils and objects) and compared the data obtained in the present study with those described in a previous study with male subjects. The experiment consisted of three blocks of 24 pictures and each block had an approximate duration of 4 min. Our sample consisted of 36 subjects (age range: 18 to 26 years) and each subject... Tipo: Info:eu-repo/semantics/article Palavras-chave: Emotion; Behavior; Reaction time; Sex differences; Affective stimulus. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300011 Experimental context modulates warning signal effects BJMBR 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 Gap effect and reaction time distribution: simple vs choice manual responses BJMBR 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 Looking for the GAP effect in manual responses and the role of contextual influences in reaction time experiments BJMBR 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 Registros recuperados: 4 Primeira ... 1 ... Última

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