Aging Increases Cross-Modal Distraction by Unexpected Sounds: Controlling for Response Speed

Area of Science:

• Cognitive Psychology
• Neuroscience of Aging

Background:

• Task-irrelevant sounds capture attention and disrupt performance.
• Previous studies suggested older adults experience greater auditory distraction, but this was not controlled for general slowing.

Purpose of the Study:

• To investigate age-related differences in auditory distraction, controlling for baseline response speed.
• To clarify if increased distraction in older adults is a genuine age effect or a proportional one.

Main Methods:

• Reanalyzed data from four studies using a proportional measure of distraction (PMD).
• Employed Bayesian estimation to determine age-related differences in deviance distraction and effect sizes.
• Analyzed proportion of correct responses (PC) and compared cross-modal vs. uni-modal distraction effects.

Main Results:

• Older adults exhibited significantly greater deviance distraction than younger adults, even after controlling for baseline response speed.
• Bayesian analysis indicated that unexpected sounds proportionally lengthened response times approximately twice as much in older adults compared to younger adults.
• Results for proportion of correct responses converged, and cross-modal distraction effects were selectively enhanced by aging.

Conclusions:

• Older adults are genuinely more susceptible to distraction by unexpected sounds in visual tasks than younger adults.
• This heightened distraction effect in older adults is not explained by age-related slowing of general response times.
• Aging selectively impacts cross-modal distraction, suggesting age-related changes in attentional control mechanisms.