Failure induces task-irrelevant exploration during a stencil task

Area of Science:

• Motor control and learning
• Neuroscience of decision-making
• Human-computer interaction

Background:

• Performance failure in reward-based motor tasks typically increases movement variability along task-relevant dimensions.
• This increased variability is thought to reflect exploratory behavior aimed at improving performance.
• It remains unclear if failure also drives exploration in dimensions that do not directly impact task outcomes.

Purpose of the Study:

• To investigate whether performance failure during a motor task induces exploration along task-irrelevant dimensions.
• To determine if motor exploration extends beyond dimensions critical for task success.

Main Methods:

• Participants performed a stencil task using a stylus, controlling downward force (task-relevant for reward) and movement patterns (task-irrelevant).
• Movement pattern analysis focused on the distribution of movement directions within each movement.
• The study compared movement variability in both task-relevant and task-irrelevant dimensions following performance failure.

Main Results:

• Significant exploration was observed in the task-relevant force dimension after performance failure.
• Crucially, significant exploration was also found in the task-irrelevant movement pattern dimension.
• These findings indicate that failure impacts variability beyond dimensions directly linked to reward.

Conclusions:

• Performance failure can indeed induce additional movement variability along task-irrelevant dimensions.
• This suggests that failure triggers broader exploratory processes that are not strictly confined to performance-critical aspects of a task.