Consonant cluster acquisition in Chilean children with typical and protracted phonological development

Vergara, Patricio; Bernhardt, Barbara May; Pérez, Denisse; Diez-Itza, Eliseo

doi:10.1080/02699206.2020.1851306

Cited by 4 publications

(8 citation statements)

References 23 publications

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“…There were also marked differences in the profiles when the relative frequencies of substitutions and omissions were analyzed. In the group of adolescents and adults with WS, a lower percentage was observed in the substitutions of voiceless stops, with a higher percentage of processes in voiced phonemes, in concordance with a typical trajectory also observed in the profiles of the TD controls (Vergara et al, 2021). The profiles of children with WS showed a higher percentage of vowel substitutions than those of 3-year-old TD children, which might be considered an atypical feature, as studies suggest that single vowels are acquired in the early stages of phonological development (Smith, 1973;Bosch, 2004).…”

Section: Qualitative Differences: Profiles Of Percentage Distribution...supporting

confidence: 77%

“…In contrast, a more recent study including non-linear analyses, where a brief description of the Spanish phonological system can be found, focused only in tautosyllabic clusters (Vergara et al, 2021). The observed profile of early acquisition of consonant clusters indicates an asynchronous development since the accurate production of consonant clusters is typically protracted in late phonological development and it is commonly impaired in speech disorders (McLeod et al, 2001;Pérez et al, 2018;Vergara et al, 2021). The profile of adolescents and adults with WS reconverges in this respect with that of the group of 5-year-old TD children, suggesting an atypical trajectory (Becerra and Mervis, 2019).…”

Section: Qualitative Differences: Profiles Of Percentage Distribution...mentioning

confidence: 99%

“…It is important to note that the present study as the previous one by Martínez (2010) included both tautosyllabic and heterosyllabic consonant clusters, which were also fully described in Diez-Itza and Martínez (2004). In contrast, a more recent study including non-linear analyses, where a brief description of the Spanish phonological system can be found, focused only in tautosyllabic clusters (Vergara et al, 2021). The observed profile of early acquisition of consonant clusters indicates an asynchronous development since the accurate production of consonant clusters is typically protracted in late phonological development and it is commonly impaired in speech disorders (McLeod et al, 2001;Pérez et al, 2018;Vergara et al, 2021).…”

Section: Qualitative Differences: Profiles Of Percentage Distribution...mentioning

confidence: 99%

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Late phonological development in Williams syndrome

Pérez

Martínez²,

Diez-Itza³

2022

Front. Psychol.

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Williams syndrome is a neurodevelopmental genetic disorder characterized by a unique phenotype, including mild to moderate intellectual disability and an uneven neuropsychological profile of relative strengths and weaknesses. Language structure components (i.e., phonology, morphosyntax, and vocabulary) have been considered an area of specific ability compared to pragmatic language use. However, research on phonological development in Williams syndrome is very scarce, and it suggests atypical patterns. Therefore, the aim of the present study was to explore the profiles of late phonological development in Spanish-speaking children, adolescents, and adults with Williams syndrome, based on the analysis of five classes of processes (Syllable Structure, Substitution, Omission, Assimilation, and Addition) in spontaneous speech. The phonological profiles of seven children (aged 3–8 years), and seven adolescents and young adults (aged 14–25 years) with Williams syndrome were compared with two normative groups of typically developing (TD) children at different stages of late phonological development (aged 3 and 5 years). The frequency of phonological processes in the group of children with Williams syndrome was similar to that of 3-year-old TD children, which suggests that they would be in the first stage of late phonological development (expansion stage). The group of older individuals with Williams syndrome showed a much lower frequency of processes, similar to that of 5-year-old TD children in the last stage of phonological development (resolution stage). However, their phonological processes appeared to be persistent and independent of chronological age. Furthermore, asynchronies in quantitative and qualitative profiles (relative frequency) indicated atypical and complex trajectories in late phonological development, which cannot be described as simply delayed or protracted. Remarkable individual differences were observed, especially in the group of adolescents and adults with Williams syndrome, although the majority of cases conformed to the modal profiles of their groups. A major tendency for Omission, including final consonant deletion, may be considered atypical and specific to Williams syndrome at all ages. The results of the present study raise the need for continued and appropriate phonological assessment and treatment for people with Williams syndrome across the lifespan.

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Section: Qualitative Differences: Profiles Of Percentage Distribution...supporting

confidence: 77%

Section: Qualitative Differences: Profiles Of Percentage Distribution...mentioning

confidence: 99%

Section: Qualitative Differences: Profiles Of Percentage Distribution...mentioning

confidence: 99%

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Late phonological development in Williams syndrome

Pérez

Martínez²,

Diez-Itza³

2022

Front. Psychol.

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“…On the other hand, they report for Chilean TD children from between 3 and 5 years of age match percentages averaging 60–70%, which is consistent with the percentages observed in the present study. In turn, Vergara et al ( 2020 ) found higher matching percentages in Chilean TD 4-year-olds. Results on medial codas can be compared with percentage of matches in heterosyllabic groups (C1 being a medial coda) from the study by Bernhardt et al ( 2015 ): TD children between 3 and 5 years of age showed FM percentages ranging 85–100%, while FM percentages in children with PPD of similar ages ranged 65–80% in line with findings in the present study.…”

Section: Discussionmentioning

confidence: 91%

“…From the normalcy approach, the absence of outliers in the relative distribution of processes could be interpreted as indicative of simply delayed developmental trajectories (Schaner-Wolles, 2004). However, a more in-depth analysis might reveal undetected differences (e.g., complex onsets as in Vergara et al, 2020). From the neuroconstructivist approach, the focus should be placed on the developmental process itself (Thomas and Karmiloff-Smith, 2003).…”

Section: Discussionmentioning

confidence: 99%

Assessing Phonological Profiles in Children and Adolescents With Down Syndrome: The Effect of Elicitation Methods

et al. 2021

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In the context of comparing linguistic profiles across neurodevelopmental disorders, Down syndrome (DS) has captured growing attention for its uneven profile. Although specific weaknesses in grammatical and phonological processing have been reported, research evidence on phonological development remains scarce, particularly beyond early childhood. The purpose of this study was to explore the phonological profiles of children and adolescents with Down syndrome. The profiles were based on the frequency and relative proportion of the processes observed by classes, and they were compared to those of typically developing preschool children of similar verbal age. A complementary goal was to assess the effect of two different methods of elicitation: a test of articulation and spontaneous speech sampling. Finally, intergroup and intragroup differences in full match percentages between three positions at syllable-level (complex onset, medial coda, and final coda) were assessed. The results of the present study confirmed that the frequency of phonological processes in children and adolescents with DS is atypically high and is above what is expected for lexical age and at the same level as grammatical age. Highly increased frequency of processes, consistent in all kinds of processes and positions at the syllable-level, and asynchronous with verbal age and mental age suggest atypical developmental trajectories of phonological development in the Down syndrome population.

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