Learning to talk is one of the most important milestones inhuman development, but we still have only a limited understandingof the way in which the process occurs. It normally takes justa few years to go from babbling newborn to fluent communicator.During this period, the child learns to produce a rich arrayof speech sounds through intricate control of articulatory muscles,assembles a vocabulary comprising thousands of words, and deducesthe complicated structural rules that permit construction ofmeaningful sentences. All of this (and more) is achieved withlittle conscious effort.
Dr. Fisher is a Royal Society Research Fellow at the Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, England.
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