Spatial acuity and summation on the hand: The role of thermal cues in material discrimination
- Spatial acuity and summation on the hand: The role of thermal cues in material discrimination
- 양기훈; 권동수; Lynette A. Jones
- Thermal spatial; sptial summation; thermal perception; spatial acuity
- Issue Date
- ATTENTION PERCEPTION & PSYCHOPHYSICS
- VOL 71, NO 1, 156-163
- The spatial characteristics of thermal perception were studied in two experiments that examined how thermal
stimuli are processed within the hands. A thermal display that simulates cues associated with making contact
with different materials was used in these studies. In the first experiment, participants indicated which of two
simulated materials that were presented to the index fingertip was cooler. The results indicated that participants
were unable to resolve the two areas of thermal stimulation. In the second experiment, the effects of concurrent
thermal stimulation on the ability to discriminate between simulated materials were evaluated. Thermal cues
were presented to the middle fingers of both hands and to two adjacent fingers on one hand. Thermal spatial
summation was evident across the fingers, which enhanced the ability to discriminate between materials when
the cooler stimulus was presented to three fingers. When the same stimulus was presented to the two hands, the
stimulation of adjacent fingers altered the perceived thermal response.
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