Handedness: Proficiency versus Stated Preference

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Abstract
An investigation of performance factors of developed hand preference was undertaken. Measurements taken from both the preferred and nonpreferred hands of 50 males and 50 females yielded scores on 61 dependent variables from 32 tests. Factor analyses of the scores produced 9 interpretable factors of hand performance. Each factor was common to male and female and to preferred—nonpreferred performance. However, preferred hand performance was superior on almost all tasks. Results indicate that questionnaires of stated hand preference cannot adequately represent the range of handedness or degree of differential manual proficiency. It was suggested that preferred hand performance is characterized by “Automatization” of the skills involved in hand performance.

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