Aging and the use of context in ambiguity resolution: complex changes from simple slowing

Area of Science:

• Psycholinguistics
• Cognitive Psychology
• Neuroscience

Background:

• Language comprehension relies on rapidly integrating context to resolve word meaning ambiguity.
• Previous research indicates potential age-related declines in cognitive processing efficiency.

Purpose of the Study:

• To investigate age differences in the rapid use of contextual information for ambiguity resolution in language.
• To explore the role of processing efficiency in modulating context use across the adult lifespan.

Main Methods:

• Ambiguous words were presented in sentences with context biasing either word meaning.
• Context use was assessed using offline tasks and rapid cross-modal naming.
• Computational models simulated results by varying a single speed parameter.

Main Results:

• Both younger and older adults demonstrated effective context use in offline measures.
• Only younger adults showed rapid context integration during the cross-modal naming task.
• Computational models indicated that processing speed differences explained the observed age effects.

Conclusions:

• Age-related declines in processing efficiency significantly impact the speed of context use in language comprehension.
• The ability to rapidly resolve ambiguity may be particularly vulnerable to age-related processing slowdowns.
• Findings highlight the dynamic interplay between cognitive aging and language processing mechanisms.