Speech perception and short-term memory deWcits in persistent developmental speech disorder  

Oleh:

Kenney, Mary Kay ; Barac-Cikoja, Dragana ; Finnegan, Kimberly ; Jeffries, Neal ; Ludlow, Christy L.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 96 no. 2 (2006), page 178-190.
Topik: Phonological disorders; Auditory processing; Familial disorders; Speech impairment; Phonological working memory
Fulltext: 96_02_Kenney.pdf (620.85KB)

Isi artikel

Children with developmental speech disorders may have additional deWcits in speech perception and/or short-term memory. To determine whether these are only transient developmental delays that can accompany the disorder in childhood or persist as part of the speech disorder, adults with a persistent familial speech disorder were tested on speech perception and short-term memory. Nine adults with a persistent familial developmental speech disorder without language impairment were compared with 20 controls on tasks requiring the discrimination of Wne acoustic cues for word identiWcation and on measures of verbal and nonverbal short-term memory. SigniWcant group diVerences were found in the slopes of the discrimination curves for Wrst formant transitions for word identiWcation with stop gaps of 40 and 20 ms with eVect sizes of 1.60 and 1.56. SigniWcant group diVerences also occurred on tests of nonverbal rhythm and tonal memory, and verbal short-term memory with eVect sizes of 2.38, 1.56, and 1.73. No group diVerences occurred in the use of stop gap durations for word identiWcation. Because frequency-based speech perception and short-term verbal and nonverbal memory deWcits both persisted into adulthood in the speech-impaired adults, these deWcits may be involved in the persistence of speech disorders without language impairment.

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