Details:

Alternative Title:
J Speech Lang Hear Res
Personal Author:
Peterson, Robin L. ; Pennington, Bruce F. ; Samuelsson, Stefan ; Byrne, Brian ; Olson, Richard K. ;
Peterson, Robin L. ; Pennington, Bruce F. ; Samuelsson, Stefan ; Byrne, Brian ; Olson, Richard K. ; Less -
Description:
Purpose The goal of this study was to investigate the etiologic basis for the association between deficits in phonological memory (PM) and vocabulary in school-age children. Method Children with deficits in PM or vocabulary were identified within the International Longitudinal Twin Study (ILTS). The ILTS includes 1,045 twin pairs from the United States, Australia, and Scandinavia aged 5 to 8 years. We applied the DeFries-Fulker regression method to determine whether problems in PM and vocabulary tend to co-occur because of overlapping genes, overlapping environmental risk factors, or both. Results Among children with isolated PM deficits, we found significant bivariate heritability of PM and vocabulary weaknesses both within and across time. However, when probands were selected for a vocabulary deficit, there was no evidence for bivariate heritability. In this case, the PM-vocabulary relationship appeared to owe to common shared environmental experiences. Conclusions The findings are consistent with previous research on the heritability of specific language impairment and suggest that there are etiologic subgroups of children with poor vocabulary for different reasons, one more influenced by genes and another more influenced by environment.
Subject:
[+]
Articulation Disorders
Child
Child, Preschool
Environment
Female
Humans
Language Development Disorders
Longitudinal Studies
Male
Memory
Memory Disorders
Phenotype
Phonetics
Registries
Risk Factors
Scandinavian And Nordic Countries
Twins, Dizygotic
Twins, Monozygotic
Vocabulary

Source:
J Speech Lang Hear Res. 56(4):1249-1259 ;
Pubmed ID:
23275423
Pubmed Central ID:
PMC3615120
Document Type:
Journal Article ;
Funding:
R01 HD068728/HD/NICHD NIH HHS/United States ; P50 HD027802/HD/NICHD NIH HHS/United States ; DP0770805/DP/NCCDPHP CDC HHS/United States ; R01 HD038526/HD/NICHD NIH HHS/United States ; DP0663498/DP/NCCDPHP CDC HHS/United States ; ... More +
R01 HD068728/HD/NICHD NIH HHS/United States ; P50 HD027802/HD/NICHD NIH HHS/United States ; DP0770805/DP/NCCDPHP CDC HHS/United States ; R01 HD038526/HD/NICHD NIH HHS/United States ; DP0663498/DP/NCCDPHP CDC HHS/United States ; R01 HD049027/HD/NICHD NIH HHS/United States ; Less -
Place as Subject:
Australia ; United States ;
Australia ; United States ; Less -
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:27288b69a961dbb18f58f2a9525afd5bbc5c53771dfc37a79b172f774ecb3a19
File Type:

Supporting Files

• nihms-421375.nxml

  xml

More +