Intonational characteristics of speech of 8–9-year-old children with typical development and intellectual disabilities
The study is aimed at determining the peculiarities of the intonation characteristics of the speech of 8--9-year-old children with intellectual disabilities and typical development. This work is part of the research of speech mastering in children with typical and atypical development in ontogenesis; individual intonation features of children are described. The study involved 10 children: five boys with typical development and five boys with intellectual disabilities. An auditory perceptual experiment to assess the emotionality, intelligibility of child speech and determine emphasized words in utterances (stressed words in the phrase) was conducted. The participants of the perceptual experiment were five adult Russian native speakers - researchers with experience in the field of child speech. A spectro-graphic analysis of children's speech was carried out in the Praat v.5.3.64 program. The number of words in utterances, the duration of utterances and vowels in words, the pitch values (average, maximum, minimum) were determined, and the pitch range values of utterances and stressed vowels in words were calculated. Differences in the intonation characteristics of the speech of typically developing children and children with intellectual disabilities were revealed. The individual features of the speech of children in each group were determined. The differences between groups of children with intellectual disabilities and typical development in speech intelligibility, the number of words in utterance, the speech rate, the duration of utterances and stressed vowels in words, and the pitch values of utterances were revealed. The ways of word and phrasal stress realization in the speech of the children with intellectual disabilities and typical development were described. Significant differences in the pitch range between words emphasized by intonation and other words in the utterance were not identified in children with intellectual disabilities. The analysis of the individual features of children's speech showed that phrasal stress in children with intellectual disabilities is not realized by the entire set of acoustic characteristics specific for the speech of typically developing peers. The authors declare no conflicts of interests.
Keywords
speech,
intonation characteristics,
acoustic characteristics,
children,
typical development,
mild intellectual disabilitiesAuthors
| Pavlikova Mariya I. | St Petersburg University | m.pavlikova@spbu.ru |
| Frolova Olga V. | St Petersburg University | o.v.frolova@spbu.ru |
| Lyakso Elena E. | St Petersburg University | e.lyakso@spbu.ru |
Всего: 3
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