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January 2022

Phonological treatment efficacy and developmental norms

Author(s): Morrisette, M. L., Hughes, M. T., Rowland, S.

Journal/Book: Lang Speech Hearing Serv Sch. 1996; 27: 10801 Rockville Pike Rd, Rockville, MD 20852-3279. Amer Speech-Lang-Hearing Assn. 215-230.

Abstract: The efficacy of teaching sounds in developmental sequence as defined by age norms was evaluated in two independent investigations. Study I was a within-subject evaluation using an alternating treatments design, with three children each receiving treatment on one early-acquired and one later-acquired phoneme relative to chronological age. Study II was an across-subject evaluation involving six children in a staggered multiple baseline paradigm, whereby three subjects were each taught one early-acquired sound relative to chronological age. Phonological change was measured on probes of sounds excluded from each child's phonemic inventory. General results indicated that: (a) quantitatively, change in treated phonemes and manner classes was equivocal following treatment of early-acquired and later-acquired phonemes; and (c) treatment of later-acquired phonemes led to system-wide changes in untreated sound classes, whereas treatment of early-acquired phonemes did not. These findings were considered relative to clinical intervention and theories of phonological acquisition.

Note: Article JA Gierut, Indiana Univ, Dept Speech & Hearing Sci, Bloomington, IN 47405 USA

Keyword(s): phonological disorders; phonological treatment; treatment efficacy; development norms; MISARTICULATING CHILDREN; PHONETIC INVENTORIES; DISORDERED CHILDREN; IMPAIRED CHILDREN; SPEECH; ACQUISITION; KNOWLEDGE; DISTINCTIONS; DESIGN; SOUNDS


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