Duration of auditory sensory memory in parents of children with SLI: A mismatch negativity study  

Oleh:

Barry, Johanna G. ; Hardiman, Mervyn J. ; Line, Elizabeth ; White, Katherine B. ; Yasin, Ifat ; Bishop, Dorothy V.M.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 104 no. 1 (2008), page 75-88.
Topik: Specific Language Impairment; Parents; MMN; Auditory sensory memory; Phonological short-term memory; Nonword repetition; Individual differences
Fulltext: 104_01_Barry.pdf (399.55KB)

Isi artikel

In a previous behavioral study, we showed that parents of children with SLI had a subclinical deficit in phonological short-term memory. Here, we tested the hypothesis that they also have a deficit in nonverbal auditory sensory memory. We measured auditory sensory memory using a paradigm involving an electrophysiological component called the mismatch negativity (MMN). The MMN is a measure of the brain’s ability to detect a difference between a frequent standard stimulus (1000 Hz tone) and a rare deviant one (1200 Hz tone). Memory effects were assessed by varying the inter-stimulus interval (ISI) between the standard and deviant. We predicted that parents of children with SLI would have a smaller MMN than parents of typically developing children at a long ISI (3000 ms), but not at a short one (800 ms). This was broadly confirmed. However, individual differences in MMN amplitude did not correlate with measures of phonological short-term memory. Attenuation of MMN amplitude at the longer ISI thus did not provide unambiguous support for the hypothesis of a reduced auditory sensory memory in parents of affected children. We conclude by reviewing possible explanations for the observed group effects.

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