Abstract
Confusion or frustration connected with daily demands involving left-right discrimination is a common observation even in neurologically intact adults. We aimed to test the hypothesis that the degree of left-right confusion is associated with bodily asymmetry. Sixty-two female volunteers performed a left-right decision task that required fast responses to visually presented directional words (left, right, up, down) or pictograms (←, →, ↑, ↓). Participants also performed several tests that measured asymmetry of handedness, grip strength, and tactile sensitivity, and completed self-reports on left-right confusion and perceived bodily asymmetry. Results showed significant correlations between left-right confusion and the degree of handedness and asymmetry in tactile sensitivity. These results suggest that individuals who reveal a stronger internal bias between both sides of the body show less left-right confusion than people with less salient bodily asymmetry.
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