Description and Validation of a Flexible and Broadly Usable Handedness Questionnaire

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Abstract
Empirical evidence is provided which shows that handedness questionnaires should: (a) comprise items that cover skilled and unskilled activities; (b) be sufficiently long to capture a “mass effect” of variability in lateral preferences over a range of items; and (c) allow graded answer options for individual items rather than forced left/right choices. When using questionnaires that meet these criteria, it is possible to establish significant correlations between hand preference and performance even within a group of righthanders. In addition, such questionnaires are flexible enough to accommodate a great variety of handedness classification schemes.

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