Previous studies have demonstrated that exogenous attention decreases audiovisual integration (AVI); however, whether the AVI is different when exogenous attention is elicited by bimodal and unimodal cues and its aging effect remain unclear. To clarify this matter, 20 older adults and 20 younger adults were recruited to conduct an auditory/visual discrimination task following bimodal audiovisual cues or unimodal auditory/visual cues. The results showed that the response to all stimulus types was faster in younger adults compared with older adults, and the response was faster when responding to audiovisual stimuli compared with auditory or visual stimuli. Analysis using the race model revealed that the AVI was lower in the exogenous-cue conditions compared with the no-cue condition for both older and younger adults. The AVI was observed in all exogenous-cue conditions for the younger adults (visual cue > auditory cue > audiovisual cue); however, for older adults, the AVI was only found in the visual-cue condition. In addition, the AVI was lower in older adults compared to younger adults under no- and visual-cue conditions. These results suggested that exogenous attention decreased the AVI, and the AVI was lower in exogenous attention elicited by bimodal-cue than by unimodal-cue conditions. In addition, the AVI was reduced for older adults compared with younger adults under exogenous attention.

先前的研究表明，外源性注意力会降低视听整合（AVI）；然而，当双峰和单峰线索引起外源注意力时，AVI 是否有所不同及其老化效应仍不清楚。为了澄清这个问题，招募了 20 名老年人和 20 名年轻人，根据双模态视听提示或单模态听觉/视觉提示进行听觉/视觉辨别任务。结果表明，与老年人相比，年轻人对所有刺激类型的反应更快，对视听刺激的反应比对听觉或视觉刺激的反应更快。使用竞赛模型进行的分析表明，与无提示条件下相比，老年人和年轻人在外源提示条件下的 AVI 较低。在年轻人的所有外源提示条件下都观察到了 AVI（视觉提示 > 听觉提示 > 视听提示）；然而，对于老年人来说，AVI 仅在视觉提示条件下出现。此外，在无视觉提示和视觉提示条件下，老年人的 AVI 低于年轻人。这些结果表明，外源注意力降低了 AVI，并且双峰提示条件引起的外源注意力的 AVI 低于单峰提示条件。此外，在外源性关注下，与年轻人相比，老年人的 AVI 有所降低。