The modulation of attentional load on the perception of auditory and visual information has been widely reported; however, whether attentional load alters audiovisual integration (AVI) has seldom been investigated. Here, to explore the effect of sustained auditory attentional load on AVI and the effects of aging, nineteen older and 20 younger adults performed an AV discrimination task with a rapid serial auditory presentation task competing for attentional resources. The results showed that responses to audiovisual stimuli were significantly faster than those to auditory and visual stimuli (, all ), and the younger adults were significantly faster than the older adults under all attentional load conditions (all ). The analysis of the race model showed that AVI was decreased and delayed with the addition of auditory sustained attention () for both older and younger adults. In addition, AVI was lower and more delayed in older adults than in younger adults in all attentional load conditions. These results suggested that auditory sustained attentional load decreased AVI and that AVI was reduced in older adults.

中文翻译：

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持续的听觉注意力负荷会降低老年人和年轻人的视听整合能力

注意力负荷对听觉和视觉信息感知的调节已被广泛报道；然而，注意力负荷是否会改变视听整合（AVI）却很少被研究。在这里，为了探索持续听觉注意力负荷对 AVI 的影响以及衰老的影响，19 名老年人和 20 名年轻人执行了 AV 辨别任务，其中包括竞争注意力资源的快速连续听觉呈现任务。结果表明，对视听刺激的反应明显快于对听觉和视觉刺激的反应。，全部），并且在所有注意力负荷条件下（所有注意力负荷条件下），年轻人的速度明显快于老年人）。比赛模型的分析表明，随着听觉持续注意力的增加，AVI 降低并延迟（）适用于老年人和年轻人。此外，在所有注意力负荷条件下，老年人的 AVI 都比年轻人低且延迟更多。这些结果表明，听觉持续注意力负荷会降低 AVI，并且老年人的 AVI 也会降低。