The Determination of Laterality
نویسندگان
چکیده
Writing or figure tracing, because there is represented a high level of integration, seems to have become the one diagnostic criterion. This is a serious error. Very early in the life of the child band preference does not decidedly manifest itself. Later, by forty-eight months, a preferred hand does become evident. With prolonged training, although the non-preferred hand improves considerably, it does not approach in motor skill the ability of the preferred hand. It is our opinion that writing as a criterion of laterality is an unfortunate, unscientific and incomplete selection. Not only does writing present but one phase of the neuro-muscular pattern, but imitation, enforced training and insistence on the part of parents to make the child use the right hand, heavily outweigh what would otherwise persist as an expression of native aptitude. To ascertain whether or not change of handedness in writing actually means complete change of function and determine quickly hand preference in children of pre-school age, the authors in 1930 devised a test (T-N-10) the administration of which occupies only
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