Human auditory steady-state evoked potentials during selective attention |
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| Authors: | R D Linden T W Picton G Hamel K B Campbell |
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| Affiliation: | 1. Division of Neurosurgery and Playfair Neuroscience Unit, Toronto Western Hospital, University of Toronto, Toronto, Ont. M5S 2S8 Canada;7. Human Neurosciences Research Unit, University of Ottawa, Ottawa, Ont K1H 8M5 Canada;71. School of Psychology, University of Ottawa, Ottawa, Ont. K1N N5 Canada;1. Clinical Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland;2. Faculty of Psychology, University of Economics and Human Sciences, Warsaw, Poland;3. Cognitive Psychology and Ergonomics, University of Twente, the Netherlands;4. Laboratory of Vision Science and Optometry, Adam Mickiewicz University, Poznań, Poland |
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| Abstract: | ![]()
The human auditory steady-state evoked potentials were examined during several different tasks requiring attention. Both Fourier analysis and signal averaging were used to measure the responses at stimulus rates between 37 and 41/sec. There was no effect of attention on the amplitude and phase of the steady-state evoked potentials when subjects either counted successive increments in stimulus intensity or read a book. In a dichotic listening task, there were clear changes in the late transient evoked potentials with selective attention but no changes in the steady-state responses. Furthermore, the steady-state potentials recorded during reading were not different from those obtained while the subjects were selectively attending to the auditory stimuli in one ear. There is therefore no evidence that the auditory steady-state responses are affected by attention. |
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