PMID: 20658095Jul 27, 2010Paper

Lateral asymmetry of voluntary attention orienting

Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas
B A Castro-BarrosL E Ribeiro-do-Valle

Abstract

We recently demonstrated that automatic attention favors the right side of space and, in the present study, we investigated whether voluntary attention also favors this side. Six reaction time experiments were conducted. In each experiment, 12 new 18-25-year-old male right-handed individuals were tested. In Experiments 1, 2, 3 (a, b) and 4 (a, b), tasks with increasing attentional demands were used. In Experiments 1, 2, 3a, and 4a, attention was oriented to one or both sides by means of a central spatially informative visual cue. A left or right side visual target appeared 100, 300, or 500 ms later. Attentional effects were observed in the four experiments. In Experiments 2, 3a and 4a, these effects were greater when the cue indicated the right side than when it indicated the left side (respectively: 16 +/- 10 and 44 +/- 6 ms, P = 0.015, for stimulus onset asynchrony of 500 ms in Experiment 2; 38 +/- 10 and 70 +/- 7 ms, P = 0.011, for Experiment 3a, and 23 +/- 11 and 61 +/- 10 ms, P = 0.009, for Experiment 4a). In Experiments 3b and 4b, the central cue pointed to both sides and was said to be non-relevant for task performance. In these experiments right and left reaction times did not differ. The most conservative interpretatio...Continue Reading

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Citations

Mar 14, 2014·Journal of the International Neuropsychological Society : JINS·Sarit Yaakoby-Rotem, Ronny Geva
Aug 5, 2014·Developmental Neuropsychology·Lívia Silveira PogettiLuis Augusto Teixeira

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