Impaired executive functioning mediates the association between aging and deterministic sequence learning

Area of Science:

• Cognitive Neuroscience
• Gerontology
• Psychology

Background:

• Deterministic sequence learning is crucial throughout adulthood.
• Age-related deficits in sequencing and their contributing factors are not well understood.
• Executive functioning, associated with the frontal lobe, is a potential factor in age-related sequence learning impairments.

Purpose of the Study:

• To investigate if age predicts errors in deterministic sequence learning in older adults (55-89).
• To determine if executive functioning accounts for age-related declines in sequence learning.
• To explore the mediating role of frontal-based executive abilities in the age-sequencing relationship.

Main Methods:

• Healthy older adults (ages 55-89) completed a deterministic sequence learning task.
• Participants underwent a comprehensive assessment of frontal-based executive functions.
• Sequence learning involved acquiring associations through trial-and-error feedback.

Main Results:

• Increasing age positively correlated with higher sequencing errors in eligible participants.
• The age-sequencing error relationship became non-significant after controlling for executive functioning.
• Frontal-based executive abilities mediated the association between age and sequence learning performance.

Conclusions:

• Executive functioning, particularly frontal lobe abilities, may underlie age-related deficits in deterministic sequence learning.
• Maintaining executive functions could be key to preserving sequencing skills in older adults.
• These findings highlight the critical role of executive control in age-related changes in learning sequential operations.