期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 105, 期 35, 页码 13174-13178出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0803718105
关键词
source segregation; auditory scene analysis; spatial hearing; streaming; auditory mixture
资金
- Office of Naval Research [N000140710061]
- National Institute on Deafness and Other Communication Disorders [R01 DC04663]
- University of Sydney Postdoctoral Research Fellowship
- Slovak Science Agency (VEGA) [1/3134/06]
In complex scenes, the identity of an auditory object can build up across seconds. Given that attention operates on perceptual objects, this perceptual buildup may alter the efficacy of selective auditory attention overtime. Here, we measured identification of a sequence of spoken target digits presented with distracter digits from other directions to investigate the dynamics of selective attention. Performance was better when the target location was fixed rather than changing between digits, even when listeners were cued as much as 1 s in advance about the position of each subsequent digit. Spatial continuity not only avoided well known costs associated with switching the focus of spatial attention, but also produced refinements in the spatial selectivity of attention across time. Continuity of target voice further enhanced this buildup of selective attention. Results suggest that when attention is sustained on one auditory object within a complex scene, attentional selectivity improves over time. Similar effects may come into play when attention is sustained on an object in a complex visual scene, especially in cases where visual object formation requires sustained attention.
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