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Time-distance relations in shifting attention between locations on one's body
1Stanford University, California, USA. lakatos@vancouver.wsu.edu
Perception & Psychophysics
|May 1, 1997
Summary
Reaction times to tactile stimuli increase with distance from the attended location. This effect is based on straight-line spatial distance, not distance through the body.
Area of Science:
- Cognitive Neuroscience
- Human Sensory Perception
Background:
- Attentional focus influences sensory processing.
- Spatial relationships can modulate tactile detection.
Purpose of the Study:
- To investigate if tactile stimulus detection time is affected by the distance from an attended body location.
- To differentiate between body-internal and spatial distance as factors influencing tactile attention.
Main Methods:
- Participants attended to auditory cues indicating specific body locations.
- Tactile stimuli (air puffs) were presented at various locations.
- Reaction times to detect tactile stimuli were measured in relation to the attended location and stimulus presentation.
Main Results:
- Reaction times significantly increased as the distance between the attended and stimulated body locations grew.
- Experiment 2 indicated that straight-line spatial distance, rather than distance through the body, was the primary determinant of reaction time.
Conclusions:
- Spatial attention modulates tactile perception, with greater distances leading to slower detection.
- The spatial layout in three-dimensional space, not the physical path through the body, governs this attentional effect on tactile discrimination.
