Effects of Frequency of Early Intervention on Spoken Language and Literacy Levels of Children Who are Deaf or Hard of Hearing in Preschool and Elementary School

Abstract

Language delays associated with hearing loss during infancy may have a negative impact on academic development throughout childhood. Early intervention provided by the Moog Center for Deaf Education prior to 36 months of age was quantified, and associations with later outcomes were examined for 50 students who are DHH representing Moog Center alumni. The objective was to determine whether the amount of early intervention (referred to hereafter as dose of early intervention received at the Moog Center during the time children were 0-36 months of age) contributed uniquely to outcomes in preschool (4–6 years) and in elementary school (8–14 years). Analysis of language and reading outcomes concluded that greater doses of early intervention were beneficial, even when other contributing factors such as degree of hearing loss, nonverbal intelligence, and age at first intervention were taken into account. Those children with poor aided speech perception scores in preschool exhibited the most benefit from early intensive intervention. Average language scores were within the expected range in comparison with hearing peers in preschool and remained within expectation when assessed an average of four years later in elementary school. The intensity of early intervention provided at the Moog Center contributed significantly to long-term development of language and literacy over and above the benefits associated with the age at which intervention was delivered.

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