A growing research line documents significant bivariate correlations between individual measures of speech perception gathered in infancy and concurrent or later vocabulary size. One interpretation of this correlation is that it reflects language specificity: Both speech perception tasks and the development of the vocabulary recruit the…

A model of speech perception and production is suggested here which attempts to account for different rates of acquisition of perceptual and productive skill in the second language without assuming the existence of two separate second language grammars. (Author/KM)