Dual associations between hand preference and visual asymmetry in perception of faces.

Abstract

A hand preference questionnaire and a face-matching task were administered to 83 female college students. Although the first and the second factor scores of hand preference correlated with a leftward perceptual bias on the face-matching task, the first factor correlated positively and the second negatively. Consistently, all of hand-preference items loading on the first factor correlated positively, and most items loading on the second factor negatively. Further, the bias for right-hand use of each hand-preference item correlated with the leftward perceptual bias. Hand preference may have independent dual associations with perceptual asymmetries, and factors of hand preference and bias for the right hand use may distinguish between the associations.