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The quick and the dead: when reaction beats intention
Andrew E Welchman1, James Stanley, Malte R Schomers
1School of Psychology, University of Birmingham, Birmingham B15 2TT, UK. a.e.welchman@bham.ac.uk
Proceedings. Biological Sciences
|February 5, 2010
Summary
Reactive actions are executed 10% faster than planned movements. This reactive advantage in motor control may enhance survival by speeding up responses to environmental stimuli.
Area of Science:
- Neuroscience
- Motor Control
- Behavioral Science
Background:
- Human behavior balances planned actions with reactions to environmental cues.
- Neuroscience and brain imaging indicate distinct neural control mechanisms for different movement types.
Purpose of the Study:
- To investigate the dynamics of intentional versus reactive movements.
- To determine if reactive actions offer a speed advantage over planned actions.
Main Methods:
- A competitive behavioral paradigm was designed where participants performed button presses against each other.
- Within-subject analysis of movement times was conducted to compare intentional and reactive actions.
Main Results:
- A significant 10% faster execution time was observed for reactive actions compared to intentional actions.
- This reactive advantage persisted even when opponents performed different actions or when competing against a computer.
Conclusions:
- Faster ballistic movements appear to be a general characteristic of reactive motor control.
- This reactive advantage may play a crucial role in survival by enabling quicker responses.
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