Auditory Mismatch Negativity Response in Institutionalized Children

Area of Science:

• Developmental Psychology
• Neuroscience
• Linguistics

Background:

• Early speech perception attunes to native language properties, crucial for language development.
• Institutional care (IC) may impact language development, prompting research into its effects.
• Understanding phonological processing in institutionally reared children is vital.

Purpose of the Study:

• To investigate speech perception development in infants with and without institutional care history.
• To examine the impact of institutionalization on phonological processing and native language attunement.
• To determine if institutional rearing affects language development milestones.

Main Methods:

• Utilized a double-oddball paradigm with native (Russian) and foreign (Hindi) language stimuli.
• Measured Mismatch Negativity (MMN) brain response in two age groups (<12 months and >12 months).
• Compared MMN responses between children from institutional care (IC) and biological family care (BFC) settings.

Main Results:

• No MMN effect observed in infants younger than 12 months, irrespective of living environment.
• Older infants (>12 months) showed MMN for native language contrasts but not foreign ones.
• No significant differences in phonological processing between IC and BFC groups for children over 12 months.

Conclusions:

• Phonological processing and native language attunement emerge after 12 months of age.
• Institutional rearing does not appear to cause delays in phonological development by 20 months.
• MMN is a sensitive measure for tracking early speech perception development and its environmental influences.