Authors: Tsybina I, Eriks-Brophy A
Title: Bilingual dialogic book-reading intervention for preschoolers with slow expressive vocabulary development
Source: Journal of Communication Disorders 2010 43(6): 538-556
Year: 2010
Research Design: Non Randomised Controlled Trial
Rating Score: 02/10
This rating is confirmed
Eligibility specified - Y
Random allocation - N
Concealed allocation - N
Baseline comparability - N
Blind subjects - N
Blind therapists - N
Blind assessors - N
Adequate follow-up - N
Intention-to-treat analysis - N
Between-group comparisons - Y
Point estimates and variability - Y

This study examined the feasibility of using a dialogic book-reading intervention for 22-41-month-old bilingual preschool children with expressive vocabulary delays. The intervention was provided in English and Spanish concurrently to an experimental group of six children, while six other children were in a delayed treatment control group. Thirty 15-min sessions using dialogic book-reading strategies were provided in each language in the children's homes, in English by the primary investigator and in Spanish by the children's mothers, who were trained in the techniques of dialogic book-reading. Results showed that the children in the intervention group learned significantly more target words in each language following the intervention than the children in the control group. The children in the intervention group were also able to produce the acquired words at the time of a follow-up test 6 weeks after the end of the intervention. The gains in the overall vocabulary of the two groups of children did not differ significantly. The children's mothers expressed satisfaction with the program, and confirmed the benefits of dialogic book-reading for their children's learning of target words.

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