Department of Psychology, Brock University.
Department of Epidemiology and Biostatistics, Western University.
Psychol Aging. 2021 Aug;36(5):604-615. doi: 10.1037/pag0000615. Epub 2021 Jul 22.
Naturalistic stimuli (e.g., movies) provide the opportunity to study lifelike experiences in the lab. While young adults respond to these stimuli in a highly synchronized manner [as indexed by intersubject correlations (ISC) in their neural activity], older adults respond more idiosyncratically. Here, we examine whether eye-movement synchrony (eye-ISC) also declines with age during movie-watching and whether it relates to memory for the movie. Our results show no age-related decline in eye-ISC, suggesting that age differences in neural ISC are not caused by differences in viewing patterns. Both age groups recalled the same number of episodic details from the movie, but older adults recalled proportionally fewer episodic details due to their greater output of semantic and false information. In both age groups, higher eye-ISC related to a higher proportion of internal details and a lower proportion of false information being recalled. Finally, both older and younger adults showed better cued recall for cues taken from within the same event than those spanning an event boundary, further confirming that events are stored in long-term memory as discrete units with stronger associations within than across event boundaries. Taken together, these findings suggest that naturalistic stimuli drive perception in a similar way in younger and older adults, but age differences in neural synchrony further up the information processing stream may contribute to subtle differences in event memory. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
自然刺激（例如电影）提供了在实验室中研究逼真体验的机会。虽然年轻人对这些刺激的反应非常同步[以他们的神经活动中的主体间相关性（ISC）为指标]，但老年人的反应更为特殊。在这里，我们研究了在观看电影时，眼动同步（眼 ISC）是否也会随着年龄的增长而下降，以及它是否与电影的记忆有关。我们的结果表明，眼 ISC 没有随年龄增长而下降，这表明神经 ISC 的年龄差异不是由观看模式的差异引起的。两个年龄组从电影中回忆出的情节细节数量相同，但由于老年人输出的语义和虚假信息较多，因此回忆出的情节细节比例较低。在两个年龄组中，较高的眼 ISC 与更多的内部细节和更少的虚假信息被回忆起来有关。最后，无论是老年人还是年轻人，对于来自同一事件内的提示的线索回忆都比跨越事件边界的提示回忆更好，这进一步证实了事件在长期记忆中是以离散的单元存储的，事件内部的关联比跨事件边界的关联更强。综上所述，这些发现表明，自然刺激以相似的方式驱动年轻人和老年人的感知，但信息处理流中神经同步的年龄差异可能导致事件记忆的微妙差异。（PsycInfo 数据库记录（c）2021 APA，保留所有权利）。
