title: Is the phonological deficit in developmental dyslexia related to impaired phonological representations and to universal phonological grammar?
abstract: To date, the nature of the phonological deficit in developmental dyslexia is still debated. We concur with possible impairments in the representations of the universal phonological constraints that universally govern how phonemes co-occur as a source of this deficit. We were interested in whether-and how-dyslexic children have sensitivity to sonority-related markedness constraints. We tested 10 French dyslexic children compared with 20 typically developing chronological age-matched and reading level-matched controls. All were tested with two aurally administered syllable counting tasks that manipulated well-formedness of unattested consonant clusters, as determined by universal phonological sonority-related markedness constraints (onset clusters in Experiment 1; intervocalic clusters in Experiment 2). Surprisingly, dyslexic children's response patterns were similar to those in both control groups; as universal phonological sonority-related markedness increased, dyslexic children increasingly perceptually confused and phonologically repaired clusters with an illusory epenthetic vowel (e.g., /ʁəbal/). Although dyslexic children were systematically slower, like both control groups, they were influenced by universal sonority-related markedness constraints and hierarchically ranked constraints specific to French over evident acoustic-phonetic contrasts or sonority-unrelated cues. Our results are counterintuitive but innovative and compete to question an impaired universal phonological grammar because dyslexic children were found to have normal universal phonological constraints and were skilled to restore phonotactically legal syllable structures with a language-specific illusory epenthetic vowel (i.e., /ə/-like vowel). We discuss them regarding active phonological decoding and recoding processes within the framework of the optimality theory.
authors: Department of Developmental Cognitive Neuroscience, Institute of Development, Aging, and Cancer (IDAC), Tohoku University, Miyagi-ken, Sendai 980-8575, Japan. norbert.mp@idac.tohoku.ac.jp
authors: Norbert
authors: N
authors: Maïonchi-Pino
authors: Yasuyuki
authors: Y
authors: Taki
authors: Satoru
authors: S
authors: Yokoyama
authors: Annie
authors: A
authors: Magnan
authors: Kei
authors: K
authors: Takahashi
authors: Hiroshi
authors: H
authors: Hashizume
authors: Jean
authors: J
authors: Écalle
authors: Ryuta
authors: R
authors: Kawashima
mesh_terms: D001364:Awareness; D002648:Child; D003463:Cues; D004410:Dyslexia / Q000175:diagnosis* / Q000523:psychology* / Q000628:therapy; D004519:Education, Special; D005260:Female; D005602:France; D006801:Humans; D007808:Language Therapy; D008297:Male; D010700:Phonetics; D011930:Reaction Time; D012016:Reference Values; D012660:Semantics; D013018:Sound Spectrography; D013067:Speech Perception