Davison et al. (2011) longitudinal bilingual language and literacy dataset

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Evidence · 6 claims (6 for) · 1 study (1 associational), q3 · 0 of 1 report an effect size · 6 claims rest on one study

Description

A longitudinal dataset from 81 bilingual Puerto Rican-heritage Head Start children containing repeated English and Spanish language measures and reading outcomes, collected and analyzed by Davison et al.

Components

• Longitudinal bilingual language and literacy dataset from 81 Head Start children with growth curve analysis: The study's dataset comprises 81 bilingual Puerto Rican-heritage children from low-income families in Central Pennsylvania, assessed in fall and spring of two Head Start years and at the end of first grade. Language measures included the TELD-3 and PPVT-III for English, the PLS-3 and TVIP for Spanish, and the WLPB-R letter-word identification and passage comprehension subtests for reading. Children were divided into Home English Communicators (n = 48) and School English Communicators (n = 33) based on mothers' reports of English exposure timing. Growth curve models were estimated using R-software 2.5.1 with measurement occasion as the time metric. (Davison et al. (2011))

Claims

• Growth in bilingual preschoolers' Spanish receptive vocabulary and oral comprehension during Head Start positively predicts first-grade Spanish letter-word identification and passage comprehension [+W]
• Growth in bilingual preschoolers' English receptive vocabulary and oral comprehension during Head Start positively predicts first-grade English letter-word identification and passage comprehension [+W]
• Bilingual children's English and Spanish receptive vocabulary and oral comprehension both increased across two years of Head Start, with group advantages in the language of prior exposure [+W]
• Growth in English receptive language during Head Start predicts first-grade Spanish letter-word identification and passage comprehension, supporting cross-language transfer [+W]
• Timing of English exposure moderates how vocabulary growth predicts reading: English vocabulary growth predicted HEC children's English passage comprehension while Spanish vocabulary growth predicted SEC children's English reading [+W]
• Growth in Spanish receptive language during Head Start predicts first-grade English letter-word identification and passage comprehension, with timing-of-exposure group differences for Spanish vocabulary [+W]

Related Products and Programmes

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Key Sources

• Davison, Megan Dunn; Hammer, Carol; Lawrence, Frank R. (2011). Associations between Preschool Language and First Grade Reading Outcomes in Bilingual Children. Journal of Communication Disorders. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3138808/

Page metadata

Field	Value
type	product
id	davison-et-al-2011-longitudinal-bilingual-language-and-literacy-dataset
title	Davison et al. (2011) longitudinal bilingual language and literacy dataset
description	A longitudinal dataset from 81 bilingual Puerto Rican-heritage Head Start children containing repeated English and Spanish language measures and reading outcomes, collected and analyzed by Davison et al.
status	review
product_kind	dataset
generated	by process:settle-candidates on 2026-10-17
trust	unverified — no one has confirmed this page's content

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