Cortical processing of sublexical speech and nonspeech sounds in children and adults

Tutkimustuotos: OpinnäyteVäitöskirjaArtikkelikokoelma

Kuvaus

Accurate perception of speech sound features forms the basis of language and oral
communication. Cortical speech processing consists of sound identification,
feature extraction, and change discrimination, all occurring within a few hundred
milliseconds timescale, and leading to conscious perception of sounds in their
context. When these processes do not work optimally, speech perception is
hampered, which can lead to problems in academic achievement or social
interaction. Therefore, in this thesis, the processing of sublexical syllables and
changes if their five features (consonant, vowel, vowel duration, fundamental
frequency (F0), and intensity) were compared to the processing of complex
nonspeech sounds in adults and six-year-old children, using event-related
potentials (ERPs). Overall, larger ERP amplitudes or stronger magnetic
mismatch negativity (MMNm) sources were found for speech than nonspeech
stimuli. Stronger responses in the speech than the nonspeech condition were seen
in both groups for changes in consonants, vowels, vowel duration and vowel F0.
This is consistent with their role in Finnish: in addition to phonemic changes,
vowel duration and F0 changes co-signal vowel quantity, which differentiates
word meaning. Furthermore, children, but not adults, had larger left-lateralized
responses for speech than nonspeech intensity changes, which is possibly
beneficial for word segmentation and learning. Moreover, children's cortical
measures were associated with neurocognitive skills. The overall pattern of larger
speech than nonspeech responses was associated with better reasoning skills.
Furthermore, larger left than right hemisphere ERP amplitudes for speech
stimuli were associated with better performance in language tasks. Finally, the
early responses (P1, early differentiating negativity, EDN) were associated with
phonological and prereading skills, and later responses (N2, N4, late
differentiating negativity, LDN) with verbal short-term memory and naming
speed. The results suggest that speech and nonspeech sounds are processed by at
least partially different neural substrates in preschoolers and adults.
Furthermore, intra-individual differences in ERP amplitudes between conditions
and hemispheres might be a useful tool in assessing cortical auditory functioning
in children without the requirement of attention or motivation to carry out tasks.
Alkuperäiskielienglanti
JulkaisupaikkaHelsinki
Kustantaja
Painoksen ISBN978-951-51-2836-2
Sähköinen ISBN978-951-51-2837-9
TilaJulkaistu - 2016
OKM-julkaisutyyppiG5 Tohtorinväitöskirja (artikkeli)

Tieteenalat

  • 515 Psykologia

Lainaa tätä

@phdthesis{4d5396b2a5f94070a99bb442914c0f03,
title = "Cortical processing of sublexical speech and nonspeech sounds in children and adults",
abstract = "Accurate perception of speech sound features forms the basis of language and oralcommunication. Cortical speech processing consists of sound identification,feature extraction, and change discrimination, all occurring within a few hundredmilliseconds timescale, and leading to conscious perception of sounds in theircontext. When these processes do not work optimally, speech perception ishampered, which can lead to problems in academic achievement or socialinteraction. Therefore, in this thesis, the processing of sublexical syllables andchanges if their five features (consonant, vowel, vowel duration, fundamentalfrequency (F0), and intensity) were compared to the processing of complexnonspeech sounds in adults and six-year-old children, using event-relatedpotentials (ERPs). Overall, larger ERP amplitudes or stronger magneticmismatch negativity (MMNm) sources were found for speech than nonspeechstimuli. Stronger responses in the speech than the nonspeech condition were seenin both groups for changes in consonants, vowels, vowel duration and vowel F0.This is consistent with their role in Finnish: in addition to phonemic changes,vowel duration and F0 changes co-signal vowel quantity, which differentiatesword meaning. Furthermore, children, but not adults, had larger left-lateralizedresponses for speech than nonspeech intensity changes, which is possiblybeneficial for word segmentation and learning. Moreover, children's corticalmeasures were associated with neurocognitive skills. The overall pattern of largerspeech than nonspeech responses was associated with better reasoning skills.Furthermore, larger left than right hemisphere ERP amplitudes for speechstimuli were associated with better performance in language tasks. Finally, theearly responses (P1, early differentiating negativity, EDN) were associated withphonological and prereading skills, and later responses (N2, N4, latedifferentiating negativity, LDN) with verbal short-term memory and namingspeed. The results suggest that speech and nonspeech sounds are processed by atleast partially different neural substrates in preschoolers and adults.Furthermore, intra-individual differences in ERP amplitudes between conditionsand hemispheres might be a useful tool in assessing cortical auditory functioningin children without the requirement of attention or motivation to carry out tasks.",
keywords = "515 Psychology, speech, nonspeech, children, ERP, neurocognitive tests",
author = "Soila Kuuluvainen",
year = "2016",
language = "English",
isbn = "978-951-51-2836-2",
series = "Studies in Psychology / University of Helsinki, Institute of Behavioural Sciences",
publisher = "University of Helsinki",
number = "124",
address = "Finland",

}

Cortical processing of sublexical speech and nonspeech sounds in children and adults. / Kuuluvainen, Soila.

Helsinki : University of Helsinki, 2016. 93 s.

Tutkimustuotos: OpinnäyteVäitöskirjaArtikkelikokoelma

TY - THES

T1 - Cortical processing of sublexical speech and nonspeech sounds in children and adults

AU - Kuuluvainen, Soila

PY - 2016

Y1 - 2016

N2 - Accurate perception of speech sound features forms the basis of language and oralcommunication. Cortical speech processing consists of sound identification,feature extraction, and change discrimination, all occurring within a few hundredmilliseconds timescale, and leading to conscious perception of sounds in theircontext. When these processes do not work optimally, speech perception ishampered, which can lead to problems in academic achievement or socialinteraction. Therefore, in this thesis, the processing of sublexical syllables andchanges if their five features (consonant, vowel, vowel duration, fundamentalfrequency (F0), and intensity) were compared to the processing of complexnonspeech sounds in adults and six-year-old children, using event-relatedpotentials (ERPs). Overall, larger ERP amplitudes or stronger magneticmismatch negativity (MMNm) sources were found for speech than nonspeechstimuli. Stronger responses in the speech than the nonspeech condition were seenin both groups for changes in consonants, vowels, vowel duration and vowel F0.This is consistent with their role in Finnish: in addition to phonemic changes,vowel duration and F0 changes co-signal vowel quantity, which differentiatesword meaning. Furthermore, children, but not adults, had larger left-lateralizedresponses for speech than nonspeech intensity changes, which is possiblybeneficial for word segmentation and learning. Moreover, children's corticalmeasures were associated with neurocognitive skills. The overall pattern of largerspeech than nonspeech responses was associated with better reasoning skills.Furthermore, larger left than right hemisphere ERP amplitudes for speechstimuli were associated with better performance in language tasks. Finally, theearly responses (P1, early differentiating negativity, EDN) were associated withphonological and prereading skills, and later responses (N2, N4, latedifferentiating negativity, LDN) with verbal short-term memory and namingspeed. The results suggest that speech and nonspeech sounds are processed by atleast partially different neural substrates in preschoolers and adults.Furthermore, intra-individual differences in ERP amplitudes between conditionsand hemispheres might be a useful tool in assessing cortical auditory functioningin children without the requirement of attention or motivation to carry out tasks.

AB - Accurate perception of speech sound features forms the basis of language and oralcommunication. Cortical speech processing consists of sound identification,feature extraction, and change discrimination, all occurring within a few hundredmilliseconds timescale, and leading to conscious perception of sounds in theircontext. When these processes do not work optimally, speech perception ishampered, which can lead to problems in academic achievement or socialinteraction. Therefore, in this thesis, the processing of sublexical syllables andchanges if their five features (consonant, vowel, vowel duration, fundamentalfrequency (F0), and intensity) were compared to the processing of complexnonspeech sounds in adults and six-year-old children, using event-relatedpotentials (ERPs). Overall, larger ERP amplitudes or stronger magneticmismatch negativity (MMNm) sources were found for speech than nonspeechstimuli. Stronger responses in the speech than the nonspeech condition were seenin both groups for changes in consonants, vowels, vowel duration and vowel F0.This is consistent with their role in Finnish: in addition to phonemic changes,vowel duration and F0 changes co-signal vowel quantity, which differentiatesword meaning. Furthermore, children, but not adults, had larger left-lateralizedresponses for speech than nonspeech intensity changes, which is possiblybeneficial for word segmentation and learning. Moreover, children's corticalmeasures were associated with neurocognitive skills. The overall pattern of largerspeech than nonspeech responses was associated with better reasoning skills.Furthermore, larger left than right hemisphere ERP amplitudes for speechstimuli were associated with better performance in language tasks. Finally, theearly responses (P1, early differentiating negativity, EDN) were associated withphonological and prereading skills, and later responses (N2, N4, latedifferentiating negativity, LDN) with verbal short-term memory and namingspeed. The results suggest that speech and nonspeech sounds are processed by atleast partially different neural substrates in preschoolers and adults.Furthermore, intra-individual differences in ERP amplitudes between conditionsand hemispheres might be a useful tool in assessing cortical auditory functioningin children without the requirement of attention or motivation to carry out tasks.

KW - 515 Psychology

KW - speech

KW - nonspeech

KW - children

KW - ERP

KW - neurocognitive tests

M3 - Doctoral Thesis

SN - 978-951-51-2836-2

T3 - Studies in Psychology / University of Helsinki, Institute of Behavioural Sciences

PB - University of Helsinki

CY - Helsinki

ER -

Kuuluvainen S. Cortical processing of sublexical speech and nonspeech sounds in children and adults. Helsinki: University of Helsinki, 2016. 93 s. (Studies in Psychology / University of Helsinki, Institute of Behavioural Sciences; 124).