Children's brain responses to sound changes in pseudo words in a multifeature paradigm

Eino Partanen1, Ritva Torppa, Johannes Pykäläinen

  • 1Cognitive Brain Research Unit, Cognitive Science, Institute of Behavioral Sciences, University of Helsinki, Finland. eino.partanen@helsinki.fi

Insights

Children

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Speech Science

Background:

  • The mismatch negativity (MMN) paradigm traditionally assesses auditory processing to simple stimuli like tones or isolated syllables.
  • Investigating speech sound discrimination in children within naturalistic contexts is crucial for understanding language development.

Purpose of the Study:

  • To evaluate the efficacy of a multifeature mismatch negativity (MMN) paradigm for assessing neural speech sound discrimination in children within a pseudo-word context.
  • To determine if this paradigm can effectively detect responses to various phonetic changes in young children.

Main Methods:

  • Preschoolers (under 7) and school-aged children (over 7) participated.
  • A multifeature MMN paradigm was employed, presenting a pseudo-word [tɑtɑtɑ] with changes in vowel duration, fundamental frequency, gap, intensity, and vowel identity.
  • MMN responses were recorded and analyzed at the individual level.

Main Results:

  • Changes in vowel duration and gap elicited significantly larger frontocentral MMN responses compared to other sound changes.
  • Vowel identity changes also resulted in an early positive P-MMR (phonological MMN response).
  • Most participants demonstrated MMNs for vowel duration and gap deviants, indicating robust neural discrimination.

Conclusions:

  • The multifeature MMN paradigm enables efficient (30-minute recordings) neural assessment of speech sound discrimination in children within a word context.
  • This paradigm offers a valuable tool for studying speech development and identifying speech sound processing deficits in pediatric populations.
Abstract

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