Abstract
Background/Study Context: Older adults tend to be affected by task-irrelevant distracters. However, whether or not this aging effect is evident when task-irrelevant and relevant stimuli are presented across different sensory modalities is still a subject of debate. The purpose of the present study was to clarify age-related differences in the effects of auditory distraction on visual information processing.Methods: Participants included 20 young individuals, 20 younger-old individuals in their 60s, and 20 older-old individuals in their 70s. Visual n-back (1-back, 2-back) working memory (WM) tasks using Japanese words were examined with and without auditory distracter conditions. Participants’ performances were analyzed using a three-way analysis of variance: 3 (age group) × 2 (distraction) × 2 (working memory load).Results: The effects of auditory distractions were influenced by aging and WM load. Auditory distractions disturbed WM performances preferentially in older adults. Further, participants in the older-old group were more affected by auditory distractions than those in the younger-old group, especially during the 2-back task.Conclusion: These results suggested that the WM performances for visual n-back tasks were largely disturbed by auditory distractions in older adults but not in young adults.
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