Effects of visual attentional load on auditory processing
作者:
Leun Otten,
Claude Alain,
Terence Picton,
期刊:
NeuroReport
(OVID Available online 2000)
卷期:
Volume 11,
issue 4
页码: 875-880
ISSN:0959-4965
年代: 2000
出版商: OVID
关键词: Auditory processing;Event-related potentials;Interstimulus interval;Mismatch negativity;Slow wave
数据来源: OVID
摘要:
Auditory evoked potentials were recorded while participants attended to visually presented digits. The difficulty of the visual task was manipulated by requiring participants to process only the current digit (0-back) or both the current and the preceding digit (1-back). Tones deviating in frequency from standard tones elicited a frontal mismatch negativity peaking around 200 ms which did not vary with visual task. However, decreasing the visual task load enhanced a right-temporal positive wave peaking around 200 ms when tones were presented slowly, and a frontocentral negative wave peaking around 450 ms when tones were presented more rapidly. The degree to which task-irrelevant sounds are processed therefore depends on the degree to which a visual task engages attentional resources.
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