Abstract

The development of serial order in a simple finger-tapping task was examined in normal school age boys and girls from 5 to 16 yr. Girls were consistently more accurate in adhering to the rate of an external entraining beat and in tapping to a steady rhythm. The right hand of all children was steadier than the left, and manual asymmetry for regularity of tapping was greater in girls than boys. The left hemisphere may be specialized for cortical functions controlling the serial organization of simple motor repetitions, and these functions mature earlier in girls than boys.

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