TY - JOUR
T1 - Effects of Early Intervention Frequency on Expressive Vocabulary Growth Rates of Very Young Children Who Are Deaf or Hard of Hearing
T2 - How Much Is Enough?
AU - Rudge, Amanda M.
AU - Brooks, Betsy Moog
AU - Grantham, Heather
N1 - Funding Information:
The authors report no sponsorships related to this work. This research was approved by the Washington University Institutional Review Board (IRB# 201705037). The authors gratefully recognize the alumni from the Moog Center for Deaf Education who participated in this study. Appreciation is expressed to Amy Birath for the sharing of her expert perspective and feedback on an earlier draft of this article. The authors also thank William Clark and Amanda Ortmann for their support and guidance in the development of this study.
Publisher Copyright:
© 2022 American Speech-Language-Hearing Association.
PY - 2022/5
Y1 - 2022/5
N2 - Purpose: The aims of this study were to explore expressive vocabulary growth rates of children who are deaf or hard of hearing (DHH) during critical periods of brain development (birth to 3 years) as well as the factors that influence the trajectories of vocabulary growth in these early years of development. Of primary interest was the effect of intervention frequency on expressive vocabulary growth. Method: Hierarchical linear modeling was used to investigate trajectories of expressive vocabulary growth using multiple measures of longitudinal vocabulary scores. A total of 417 assessments across 105 participants were analyzed to determine the average rate of lexical growth in a young population of children who are DHH receiving early intervention before age 3 years. Expected growth trajectories were constructed based on varying frequencies of intervention during critical periods of brain development. Results: Results indicated average growth rates of 5.21 new words expressed per week. Increased intervention hours prior to age 3 years was significantly associated with higher degrees of expressive vocabulary growth. Conclusion: The findings of this study suggest that greater intervention hours received before age 3 years are associated with higher degrees of expressive vocabulary growth for children who are DHH.
AB - Purpose: The aims of this study were to explore expressive vocabulary growth rates of children who are deaf or hard of hearing (DHH) during critical periods of brain development (birth to 3 years) as well as the factors that influence the trajectories of vocabulary growth in these early years of development. Of primary interest was the effect of intervention frequency on expressive vocabulary growth. Method: Hierarchical linear modeling was used to investigate trajectories of expressive vocabulary growth using multiple measures of longitudinal vocabulary scores. A total of 417 assessments across 105 participants were analyzed to determine the average rate of lexical growth in a young population of children who are DHH receiving early intervention before age 3 years. Expected growth trajectories were constructed based on varying frequencies of intervention during critical periods of brain development. Results: Results indicated average growth rates of 5.21 new words expressed per week. Increased intervention hours prior to age 3 years was significantly associated with higher degrees of expressive vocabulary growth. Conclusion: The findings of this study suggest that greater intervention hours received before age 3 years are associated with higher degrees of expressive vocabulary growth for children who are DHH.
UR - http://www.scopus.com/inward/record.url?scp=85130002754&partnerID=8YFLogxK
U2 - 10.1044/2022_JSLHR-21-00322
DO - 10.1044/2022_JSLHR-21-00322
M3 - Article
C2 - 35344389
AN - SCOPUS:85130002754
SN - 1092-4388
VL - 65
SP - 1978
EP - 1987
JO - Journal of Speech, Language, and Hearing Research
JF - Journal of Speech, Language, and Hearing Research
IS - 5
ER -