speech repetitions
... that between 5% and 45% of the words made by two year olds are speech repetitions, and that higher skill in infant speech repetition predicts more rapid expansion of spoken vocabulary?
... that between 5% and 45% of the <a href="./Word" id="mwSA" rel="mw:WikiLink" title="Word">words</a> made by two year olds are <b id="mwSQ"><a href="./Speech_repetition" id="mwSg" rel="mw:WikiLink" title="Speech repetition">speech repetitions</a></b>, and that higher skill in <a href="./Infant" id="mwSw" rel="mw:WikiLink" title="Infant">infant</a> speech repetition predicts more rapid expansion of spoken <a href="./Vocabulary" id="mwTA" rel="mw:WikiLink" title="Vocabulary">vocabulary</a>?