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Sequential predictability effects on initiation time and movement time for adults and children
1School of Physical and Health Education, University of Washington, Seattle 98195, USA.
Journal of Motor Behavior
|January 1, 1979
Summary
Sequential predictability impacts reaction times in adults and children, but not movement speed. Adults and children showed different patterns in response to repeating signals, challenging prior research.
Area of Science:
- Cognitive Psychology
- Developmental Psychology
- Human Factors
Background:
- Sequential predictability in stimuli influences human performance.
- Previous research suggested age-related differences in processing predictable sequences.
Purpose of the Study:
- To investigate the effect of sequential predictability on reaction time components in children and adults.
- To examine age-specific differences in responding to predictable versus unpredictable stimuli.
Main Methods:
- Participants (first-grade children and adults) completed a two-choice reaction time task.
- Stimuli varied in sequential predictability (repeat, alternate, or random).
- Measured initiation time and movement time separately.
Main Results:
- Sequential predictability significantly affected initiation time for both age groups.
- Movement time was not influenced by sequential predictability in either group.
- Adults showed faster initiation for alternated responses; children showed faster initiation for repeated responses.
Conclusions:
- Sequential predictability impacts reaction initiation, not movement execution, across development.
- Developmental differences exist in how children and adults utilize sequential information for response preparation.