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The learning of novel finger movement sequences
A M Gordon1, A Casabona, J F Soechting
1Department of Physiology, University of Minnesota, Minneapolis 55455.
Journal of Neurophysiology
|October 1, 1994
Summary
Typing movements are organized at multiple levels. Key transposition reveals that learned movements can be adapted to new locations, showing flexibility in motor control.
Area of Science:
- Cognitive Psychology
- Human-Computer Interaction
- Motor Control
Background:
- Typing involves complex motor sequences.
- Understanding how the brain adapts learned movements is crucial for human-computer interaction.
Purpose of the Study:
- To investigate the adaptability of learned typing movements.
- To examine how key transposition affects typing kinematics and inter-hand coordination.
Main Methods:
- Experienced typists performed typing tasks with isolated letter keys.
- Optoelectronically tracked finger and wrist motion.
- Keys were transposed mid-experiment, requiring adaptation.
Main Results:
- Key transposition increased interkey intervals, especially before the transposed key.
- Switches between homologous fingers caused smaller delays than other switches.
- With practice, delays reduced but did not reach baseline levels.
- Motor learning adapted previously learned movements to new key locations.
Conclusions:
- Typing movements are organized at both individual keystroke and word levels.
- Motor learning demonstrates flexibility, adapting existing movement patterns to new contexts.
- Hand coordination can be maintained even when movements are not strictly sequential.