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Front. Hum. Neurosci. | doi: 10.3389/fnhum.2019.00300

Auditory mismatch negativity response in institutionalized children

  • 1Saint Petersburg State University, Russia
  • 2University of Houston, United States
  • 3Baylor College of Medicine, United States
  • 4Yale College, Yale University, United States

The attunement of speech perception/discrimination to the properties of one’s native language is a crucial step in speech and language development at early ages. Studying these processes in young children with a history of institutionalization is of great interest, as being raised in institutional care (IC) may lead to lags in language development.
The sample consisted of 82 children, split into two age groups. The younger age group (<12 mos) included 17 children from the IC and 17 children from the biological-family-care (BFC) group. The older group (>12 mos) consisted of 23 children from the IC group, and 25 children from the BFC group. A double-oddball paradigm with three consonant-vowel syllables was used, utilizing the native (Russian) and foreign (Hindi) languages. A Mismatch Negativity component was elicited within a 125-225 ms time window in the frontal-central electrode.
Findings demonstrate the absence of MMN effect in the younger age group, regardless of the living environment. Children in the older group are sensitive to native deviants and do not differentiate foreign language contrasts. No significant differences were observed between the IC and BFC groups for children older than 12 months, indicating that children in the IC have typical phonological processing.
The results show that the MMN effect is not registered in Russian speaking children before the age of 12 months, regardless of their living environment. At 20 months of age, institutionally reared children show no evidence of delays in phonetic development despite ​limited experience of language.

Keywords: Institutionalization, Psychosocial Deprivation, auditory discrimination, Language Developement, MMN, mismatch negativity, Event-related potentials

Received: 19 Mar 2019; Accepted: 13 Aug 2019.

Copyright: © 2019 Ovchinnikova, Zhukova, Luchina, Petrov, Vasilyeva and Grigorenko. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Mx. Elena L. Grigorenko, Saint Petersburg State University, Saint Petersburg, 199034, Saint Petersburg, Russia, elena.grigorenko@times.uh.edu