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Related Experiment Video

Updated: Jul 17, 2026

Portable Intermodal Preferential Looking (IPL): Investigating Language Comprehension in Typically Developing Toddlers and Young Children with Autism

Portable Intermodal Preferential Looking (IPL): Investigating Language Comprehension in Typically Developing Toddlers and Young Children with Autism

Published on: December 14, 2012

Observed and reported expressive vocabulary and word combinations in bilingual toddlers.

J L Patterson¹

¹Department of Speech and Hearing Sciences, University of New Mexico, Albuquerque 87131, USA. jpatters@unm.edu

Journal of Speech, Language, and Hearing Research : JSLHR

|February 11, 2000

Summary

Parental reports accurately reflect young children's expressive vocabulary and language use in both English and Spanish. This study validates parent checklists for assessing early bilingual language development.

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Area of Science:

Child Language Acquisition
Bilingualism Research
Developmental Psychology

Background:

Assessing early language development in bilingual children presents unique challenges.
Parental reports are a common tool, but their accuracy needs validation against observed language use.

Purpose of the Study:

To investigate the consistency between parental reports and observed expressive language in bilingual toddlers.
To evaluate the reliability of the Spanish-English Vocabulary Checklist in capturing children's vocabulary and word combinations.

Main Methods:

Utilized the Spanish-English Vocabulary Checklist for parental reports.
Collected 30-minute videotaped language samples from 21- to 27-month-old children exposed to English and Spanish.
Correlated parental vocabulary counts with observed word diversity.

Main Results:

A significant positive correlation (r = .66) was found between reported and observed vocabulary.
Parental reports on word combinations and language proportion (Spanish/English) aligned with observed language use.

Conclusions:

Parental reports, specifically using adapted tools like the SEVC, are a consistent and reliable measure of expressive vocabulary and language use in young bilingual children.
Findings support the use of parental checklists for assessing early language development in bilingual contexts.