Inhibitory control over no-longer-relevant information: adult age differences

Area of Science:

• Cognitive Psychology
• Neuroscience of Aging

Background:

• Older adults often exhibit difficulties with inhibitory control, leading to memory interference.
• Previous research suggests age-related declines in the ability to suppress irrelevant information.

Purpose of the Study:

• To investigate age differences in memory inhibition using a garden-path sentence task.
• To explore methods for improving inhibitory control in older adults.

Main Methods:

• Participants (younger and older adults) completed a task requiring them to remember the final word of sentences.
• Critical sentences replaced the generated word with a new target word.
• Implicit priming tasks assessed memory access for both generated and target words.

Main Results:

• Younger adults showed priming only for target words, indicating effective inhibition of generated words.
• Older adults showed priming for both generated and target words, suggesting impaired inhibition.
• Providing an interpretive sentence for the target word improved older adults' inhibition, while extra time did not.

Conclusions:

• Older adults' memory inhibition is less efficient, leading to persistent activation of irrelevant information.
• Specific contextual information aids older adults in clearing the recent past from memory.
• Cognitive interventions should focus on providing targeted information rather than simply increasing time.