Skill acquisition as a function of age, hand and task difficulty: Interactions between cognition and action.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Gerontology

Background:

• Many activities involve intertwined cognitive and sensorimotor functions, challenging traditional dichotomies.
• Understanding activity limitation in disability requires considering these integrated processes.
• Older adults often display deficits in both cognitive tasks and motor performance, raising questions about the nature of their skill acquisition impairments.

Purpose of the Study:

• To investigate the relationship between motor performance and sequence learning in older adults.
• To test a model of sequence learning that incorporates a limited capacity buffer (working memory).
• To determine if impaired sensorimotor abilities constrain cognitive skill acquisition.

Main Methods:

• Modeling sequence learning as a process limited by working memory capacity.
• Examining serial order learning in older adults.
• Assessing sequence learning using the non-preferred hand.
• Investigating the impact of increased motor demands on serial order learning.

Main Results:

• Older adults demonstrated poorer learning of complex sequences.
• Sequence learning was impaired when using the non-preferred hand.
• Increased motor demands led to significant impairments in serial order learning, supporting the proposed model.
• Results align with reinforcement learning frameworks.

Conclusions:

• Sequence learning is constrained by both sensorimotor ability and cognitive capacity (working memory).
• The distinction between cognitive and sensorimotor deficits is often artificial, particularly in older adults.
• This research has implications for understanding and addressing activity limitations in disability and aging populations.