Data/hora: 01/06/2024 10:56:10

Provedor de dados: 	56	
País: 	Brazil	
Título: 	Control of attention by a peripheral visual cue depends on whether the target is difficult to discriminate	
Autores: 	Macea,D.D.; Abbud,G.A.C.; Lopes-de-Oliveira,M.L.; Fuga,N.B.; Ribeiro-do-Valle,L.E.	
Data: 	2006-07-01	
Ano: 	2006	
Palavras-chave: 	Attention; Cue; Discriminability; Strategy; Masking.	
Resumo: 	The influence of a peripheral cue represented by a gray ring on responsivity to a subsequent target varies. When a vertical line inside a ring was a go target and a white small ring inside a ring was a no-go target, reaction time was shorter at the same location relative to a different location. However, no reaction time difference between the two locations occurred when a white cross inside the ring, instead of the white vertical line inside the ring, was the go target. We investigated whether this last finding was due to a forward masking influence of the cue, a requirement of low attention for the discrimination or a lack of attention mobilization by the cue. In Experiment 1, the intensity of the cue was reduced in an attempt to reduce forward masking. In Experiment 2, the vertical line and the cross were presented in the same block of trials so as to be dealt with a common attentional strategy. In Experiments 3 and 4, the no-go target was a 45º rotated cross inside a ring to increase the difficulty of the discrimination. No evidence was obtained that the cross was forward masked by the cue nor that it demanded less attention to be discriminated from the small ring. There was a facilitation of responsivity by the cue when the small ring was replaced by the rotated cross. The results suggest that when the discrimination to be performed is too easy the cue does not mobilize attention.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000700014	
Editor: 	Associação Brasileira de Divulgação Científica	
Relação: 	10.1590/S0100-879X2006000700014	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Medical and Biological Research  v.39 n.7 2006	
Fonte: 	info:eu-repo/semantics/openAccess