There is a noted advantage of dense neighborhoods in language acquisition, but the learning mechanism that drives the effect is not well understood. Two hypotheses--long-term auditory word priming and phonological working memory--have been advanced in the literature as viable accounts. These were evaluated in two treatment studies enrolling twelve…

Analyzed sound systems of six phonologically disordered children and assessed relative phonological knowledge of target sounds. After-treatment results indicated that error sounds of which the children had the most knowledge were easiest to learn. Treatment beginning with the most difficult sounds resulted in more widespread changes in the…