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Relationship Between Parents' Report Rate of Twin Language and Factors Related to Linguistic Development: Older Sibling, Nonverbal Play and Preschool Attendance

Published online by Cambridge University Press:  21 February 2012

Chisato Hayashi ,
Kazuo Hayakawa ,
Chika Tsuboi ,
Keiko Oda ,
Yukiko Amau ,
Yoko Kobayashi  and
Kenji Kato
Chisato Hayashi*
Affiliation:
Department of Health Promotion Science, Faculty of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan. [email protected]
Kazuo Hayakawa
Affiliation:
Department of Health Promotion Science, Faculty of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan.
Chika Tsuboi
Affiliation:
Division of Health Management, Canon Co., Osaka City, Japan.
Keiko Oda
Affiliation:
Nishinomiya City Hospital, Nishinomiya City, Japan.
Yukiko Amau
Affiliation:
Twin Mothers' Club, Tokyo, Japan.
Yoko Kobayashi
Affiliation:
Department of Health Promotion Science, Faculty of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan.
Kenji Kato
Affiliation:
Department of Medical Epidemiology & Biostatistics, The Karolinska Institute, Stockholm, Sweden.
*
*Address for correspondence: Chisato Hayashi, Department of Health Promotion Science, Faculty of Health Sciences, Graduate School of Medicine, Osaka University, 1–7 Yamadaoka, Suita City, Osaka 565-0871, Japan.

Abstract

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The definition and nature of twin language has been a focus of recent studies concerned with the phenomenon. There has been a call for a tighter definition and understanding of the meaning of twin language (Thorpe et al., 2001). This article sought to identify social factors associated with the parent report of twin language and thus provide further understanding of the phenomenon. Data from 583 mothers of twins aged 25 to 59 months were analyzed using multiple logistic regression. Factors included in the modeling of parent-report twin language included social experience factors such as presence of siblings, attendance at preschool education and reports of nonverbal play. It was found that twin pairs who didn't have an older sibling, who showed frequent nonverbal play and who didn't attend preschool were more likely to have a twin language. Moreover, in the group not having an older sibling, the influence of whether twins attended preschool or not was strong and the odds ratio was 0.589 (95% confidence intervals 0.360–0.963). The findings suggest that social experience factors are important predictors of the parent reporting of twin language.

Type
Articles
Information
Twin Research and Human Genetics , Volume 9 , Issue 1 , 01 February 2006 , pp. 165 - 174
Copyright
Copyright © Cambridge University Press 2006