Age-related attenuation of dominant hand superiority.

The number of errors failed to reach significance for right (r = 0.209, p = 0.109; F (3,52) = 0.718, p = 0.546) and left hand performances (r = 0.236, p = 0.069; F (3,52) = 3.603, p = 0.019) ( Fig. 2e ).

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We conclude that although the older subjects were unaware of changes in their handedness, a clear trend towards an equalization of hand performance under controlled (Experiment 1, Fig. 5 ) and everyday conditions (Experiment 2, Fig. 4 ) could be measured.

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