The effect of word-level variables on expressive phonology has not been widely studied, although the properties of words likely bear on the emergence of sound structure (Stoel-Gammon, 2011). Eight preschoolers, diagnosed with phonological delay, were assigned to treatment to experimentally induce gains in expressive phonology. Erred sounds were…

Error patterns in children's phonological development are often described as simplifying processes that can interact with one another with different consequences. Some interactions limit the applicability of an error pattern, and others extend it to more words. Theories predict that error patterns interact to their full potential. While specific…

Two lawful relationships involving word-initial onset clusters have been advanced in the acquisition literature; namely, that clusters imply affricates, and that liquid clusters imply a liquid distinction. This study evaluated and extended the validity of these implicational laws in a population of 110 children (aged 3;0 to 8;6) with functional…

The lexical variables of word frequency and neighborhood density were hypothesized to facilitate sound change to varying degrees. Twelve children with functional phonological delays participated in an alternating-treatments experiment to promote sound change. Results indicated word frequency was most facilitative in sound change, whereas dense…

Investigated children's abilities to conceptualize distinctive phonological features in development, studying relationships between productive and conceptual knowledge and the influence on phonological change. Young children with phonological disorders were evaluated, given treatment for producing accurate fricatives, then retested. Results…

Distinctive feature specification and representation in phonological acquisition are examined in 30 children in the context of underspecification theory. Three questions were addressed: which features do children use to categorize segmental information; do the defining features of a category shift as the phonological system advances; and which…

Evaluates the principle of laryngeal-supralaryngeal cyclicity by manipulating the domain cycle and phase relationship of the cycle as independent variables and by monitoring longitudinally the order of emergent phonemic distinctions in the sound systems of seven children with phonological delays as the dependent variable. Findings are discussed.…

The phonemic inventories of 30 children (aged 3;4-5;7) with phonological delays were examined in terms of featural distinctions to address universal vs. individual accounts of acquisition. Phonetic inventories of the same children were also identified for comparison purposes. (Contains 40 references.) (JL)