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Descripción
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| A nonlinear effect of biological feedback on visual perception is studied when a brain?computer interface is applied. The implemented algorithm for estimation of visual attention is based on the time?frequency analysis of human electroencephalograms in real time by measuring the amplitude of the stimulus-related brain response, which takes subsequently positive and negative values. The analysis shows that time intervals with positive amplitude are associated with periods of sustained attention, whereas time intervals with negative amplitude are related to mental fatigue. The comparison of the results obtained in two groups of subjects, one without feedback and another with feedback, demonstrate that the feedback control prolongs the periods of sustained attention. The largest interval of sustained attention in the former group reached only 100±20 s versus 150±40 s in the latter group. However, the mean degree of attention, estimated by averaging the brain response amplitude over the whole interval, was 27% lower in the group with feedback than in another group. The obtained results evidence that cognitive resource is limited, and therefore, to maintain high performance for prolonged time, the brain has to work in a ?safe-mode? regime. | |
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Internacional
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JCR del ISI
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Si |
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Título de la revista
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Nonlinear Dynamics |
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ISSN
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0924-090X |
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Factor de impacto JCR
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4,604 |
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Información de impacto
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Volumen
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96 |
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DOI
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10.1007/s11071-018-4668-1 |
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Número de revista
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Desde la página
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1923 |
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Hasta la página
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1939 |
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Mes
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SIN MES |
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Ranking
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