A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Introducing the Intra-Individual Variability Hypothesis in Explaining Individual Differences in Language Development
Tekijät: Kautto, Anna; Railo, Henry; Mainela-Arnold, Elina
Kustantaja: American Speech-Language-Hearing Association
Julkaisuvuosi: 2024
Journal: Journal of Speech, Language, and Hearing Research
Tietokannassa oleva lehden nimi: Journal of speech, language, and hearing research : JSLHR
Lehden akronyymi: J Speech Lang Hear Res
Vuosikerta: 67
Numero: 8
Aloitussivu: 2698
Lopetussivu: 2707
ISSN: 1092-4388
eISSN: 1558-9102
DOI: https://doi.org/10.1044/2024_JSLHR-23-00527
Verkko-osoite: https://doi.org/10.1044/2024_JSLHR-23-00527
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/457024707
Preprintin osoite: https://osf.io/nkuv9/download
Purpose: Response times (RTs) are commonly used in studying language acquisition. However, previous research utilizing RT in the context of language has largely overlooked the intra-individual variability (IIV) of RTs, which could hold significant information about the processes underlying language acquisition.
Method: We explored the association between language abilities and RT variability in visuomotor tasks using two data sets from previously published studies. The participants were 7- to 10-year-old children (n = 77).
Results: Our results suggest that increased variability in RTs is associated with weaker language abilities. Specifically, this within-participant variability in visuomotor RTs, especially the proportion of unusually slow responses, predicted language abilities better than mean RTs, a factor often linked to language skills in past research.
Conclusions: Based on our findings, we introduce the IIV hypothesis in explaining individual differences in language development. According to our hypothesis, inconsistency in the timing of cognitive processes, reflected by increased IIV in RTs, degrades learning different aspects of language, and results in individual differences in language abilities. Future studies should further examine the relationship between IIV and language abilities, and test the extent to which the possible relationship is causal.
Ladattava julkaisu This is an electronic reprint of the original article. |
Julkaisussa olevat rahoitustiedot:
This research was financially supported by the University of Turku Graduate School wages awarded to the first author, an anonymous endowed fund to the University of Turku Speech-Language Pathology, and Kommunalrådet C. G. Sundells Stiftelse funds to the Child language research group in Åbo Akademi University Logopedics. The authors thank the Steps to the Healthy Development and Well-being of Children Cohort Study for assistance in recruiting children and University of Turku Speech-Language Pathology students for their assistance in data collection. Finally, they thank the children and families who participated.