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Concatenating familiar movement sequences: the versatile cognitive processor.
1Institut für Arbeitsphysiologie an der Universität Dortmund, Ardeystrasse 67, D-44139 Dortmund, Germany. verwey@arb-phys.uni-dortmund.de
Acta Psychologica
|March 21, 2001
Summary
Practicing key press sequences creates motor chunks for faster execution. These motor chunks are robust and can be prepared during the execution of prior sequences, showing parallel processing capabilities.
Area of Science:
- Cognitive Psychology
- Motor Control
- Human-Computer Interaction
Background:
- Motor learning research shows that practicing key press sequences forms memory representations called motor chunks.
- These motor chunks allow familiar sequences to be executed as single, unified responses.
Purpose of the Study:
- To investigate the robustness of motor chunks under different conditions.
- To determine if preparation for one sequence can overlap with the execution of another.
Main Methods:
- Two experiments were conducted where participants executed two highly practiced keying sequences rapidly.
- Sequences were triggered by simultaneously presented stimuli.
- Sequence length varied to examine preparation effects.
Main Results:
- Motor chunks were confirmed to be robust, even for short two-element sequences.
- Sequence preparation and element selection can occur during the execution of a preceding sequence.
- Shorter sequences showed greater slowing due to concurrent preparation compared to longer sequences.
Conclusions:
- Execution of familiar keying sequences is primarily handled by a dedicated motor processor.
- The cognitive processor can prepare upcoming sequences or select individual elements in parallel with motor execution.
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