背景:主观认知下降(SCD)是指个体相对于其先前的表现水平而感知到的记忆和/或其他认知能力的下降。感觉下降是老年人SCD下降的主要表现之一。视觉和听觉信息的有效整合,被称为视听整合,是一个至关重要的感知过程。这项研究旨在评估患有SCD的老年人的视听整合。
方法:我们采用了视听检测任务,Colavita任务,和声音诱发的闪光错觉(SIFI)任务通过检查冗余和虚幻效果来评估视听整合。招募被诊断为SCD的老年人(N=50,平均年龄=67.8岁)和非SCD老年人的对照组(N=51,平均年龄=66.5岁)。所有参与者都参加了上述三个实验。
结果:结果显示,SCD和非SCD老年人都出现了冗余效应,随着SCD老年人在视听检测任务中获得更多好处。此外,在Colavita任务中,在SCD和非SCD老年人中观察到同等程度的视觉优势效应.此外,在SFI任务中,与非SCD老年人相比,患有SCD的老年人感觉到相同的裂变错觉,但融合错觉更大。
结论:总体而言,与非SCD老年人相比,患有SCD的老年人表现出更高的视听冗余效应和更强的融合错觉易感性.此外,通过Colavita任务观察到两组的视觉优势,非SCD和SCD老年人之间没有显着差异。这些发现暗示视听整合可能为SCD的识别提供了一种潜在的方法。
BACKGROUND: Subjective cognitive decline (SCD) refers to individuals\' perceived decline in memory and/or other cognitive abilities relative to their previous level of performance. Sensory decline is one of the main manifestations of decline in older adults with SCD. The efficient integration of visual and auditory information, known as audiovisual integration, is a crucial perceptual process. This study aims to evaluate audiovisual integration in older adults with SCD.
METHODS: We adopted the audiovisual detection task, the Colavita task, and the Sound-Induced Flash Illusion (SIFI) task to evaluate the audiovisual integration by examining both redundant and illusory effects. Older adults diagnosed with SCD (N = 50, mean age = 67.8 years) and a control group of non-SCD older adults (N = 51, mean age = 66.5 years) were recruited. All participants took part in the three aforementioned experiments.
RESULTS: The outcomes showed that a redundant effect occurred in both SCD and non-SCD older adults, with SCD older adults gaining more benefits in audiovisual detection task. Moreover, an equivalent amount of the visual dominance effect was observed among both SCD and non-SCD older adults in Colavita task. In addition, older adults with SCD perceived an equal fission illusion but a bigger fusion illusion compared with non-SCD older adults in SIFI task.
CONCLUSIONS: Overall, older adults with SCD exhibit increased audiovisual redundant effects and stronger fusion illusion susceptibility compared to non-SCD older adults. Besides, visual dominance was observed in both groups via the Colavita task, with no significant difference between non-SCD and SCD older adults. These findings implied that audiovisual integration might offer a potential way for the identification of SCD.