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Treatment integrity in a home-based pre-reading intervention programme.
Sandra G van Otterloo1, Aryan van der Leij, Esther Veldkamp
1Department of Education, University of Amsterdam, The Netherlands. S.G.vanOtterloo@uva.nl
Dyslexia (Chichester, England)
|October 3, 2006
Summary
Treatment integrity, crucial for phonological awareness interventions, was assessed in families with children at risk for dyslexia. Higher treatment integrity significantly predicted better pre-reading skills, highlighting its importance in intervention research.
Area of Science:
- Child Development
- Educational Psychology
- Linguistics
Background:
- Treatment integrity is often overlooked in phonological awareness intervention research.
- Home-based interventions are vital for early literacy, especially for children at risk for dyslexia.
- Assessing both the quantity and quality of intervention delivery is crucial.
Purpose of the Study:
- To evaluate treatment integrity in a home-based pre-reading intervention for families with children at genetic risk for dyslexia.
- To examine the relationship between treatment integrity (quantity and quality) and pre-reading skills.
- To emphasize the importance of treatment integrity in intervention outcome research.
Main Methods:
- Assessed treatment integrity in 32 families participating in an experimental pre-reading intervention.
- Measured quantity by the number of lessons completed.
- Measured quality through observed parent-child interaction during videotaped sessions.
Main Results:
- Treatment integrity levels were 66% (quantity) and 74% (quality).
- Both measures significantly predicted pre-reading skills, accounting for 43% of the variance.
- With pre-test scores, treatment integrity explained 87% of the variance; lesson completion alone added 12%.
Conclusions:
- Treatment integrity is a significant factor in the success of phonological awareness interventions.
- Both the quantity (lesson completion) and quality (interaction) of intervention delivery are important predictors of outcomes.
- Intervention studies should consistently measure and report treatment integrity.
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