Journal
BRAIN AND LANGUAGE
Volume 104, Issue 1, Pages 75-88Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bandl.2007.02.006
Keywords
Specific Language Impairment; parents; MMN; auditory sensory memory; phonological short-term memory; nonword repetition; individual differences
Funding
- Economic and Social Research Council [PTA-037-27-0014] Funding Source: researchfish
- Wellcome Trust Funding Source: Medline
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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. (C) 2007 Elsevier Inc. All rights reserved.
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