Enhancing perceptual, attentional, and working memory demands through variable practice schedules: insights from...

Area of Science:

• Neuroscience
• Motor Learning
• Cognitive Psychology

Background:

• Contextual interference (CI) is a learning phenomenon where practicing motor tasks in a random order enhances long-term retention and transfer compared to blocked practice.
• Two main hypotheses explain CI benefits: enhanced early perceptual/attentional processes or increased mnemonic activation.
• Understanding the neural underpinnings of these processes during CI is crucial for optimizing motor skill acquisition.

Purpose of the Study:

• To investigate the neural mechanisms underlying contextual interference effects in motor learning.
• To differentiate the roles of attentional and mnemonic processes during random versus blocked motor practice using electroencephalography (EEG).
• To examine the dynamic interplay of brain networks associated with perception, attention, and memory during motor task practice.

Main Methods:

• Utilized high-density electroencephalography (EEG) to record scalp activity from 35 participants performing an aiming task.
• Employed a crossover design with random and blocked practice conditions for three different aiming distances.
• Applied multi-scale EEG analysis, including topographic analysis, source estimation, and functional connectivity, to examine neural dynamics.

Main Results:

• EEG topographies indicated more pronounced perceptual/attentional (N1, P3a) and working memory (P3b) processes during random practice.
• Source estimation revealed greater activation in the perceptual ventral pathway, anterior cingulate, and parietal cortices under random practice.
• Increased functional connectivity was observed in ventral alpha and frontoparietal theta band networks during random practice, suggesting enhanced network engagement.

Conclusions:

• Contextual interference benefits in motor learning are associated with enhanced perceptual, attentional, and working memory processes.
• Random practice, compared to blocked practice, recruits specific brain regions and large-scale functional networks supporting attentional and executive functions.
• These findings provide neural evidence supporting the role of enhanced cognitive processes and network dynamics in driving the advantages of contextual interference for motor learning.