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Optimal Dosage Characteristics of Recasting for Developmental Language Disorder: A Scoping Review.

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Title: Optimal Dosage Characteristics of Recasting for Developmental Language Disorder: A Scoping Review.
Authors: Fan, Shengfu1 shengfu.fan@utas.edu.au, Calder, Samuel D.1, Kemp, Nenagh1, Holm, Alison1
Source: Journal of Speech, Language & Hearing Research. Oct2025, Vol. 68 Issue 10, p4917-4941. 25p.
Subject Terms: *Developmental disabilities, *Speech therapy, *Evaluation, Word deafness, Treatment effectiveness, Systematic reviews, MEDLINE, Medical databases, Psychology information storage & retrieval systems
Abstract: Purpose: The purpose of this scoping review was to map and summarize currently available evidence about optimal dosage of recasting for developmental language disorder (DLD). Method: A systematic search of databases was completed, including Web of Science, Medline via OvidSP, PsycINFO, Cochrane Library, and Scopus. The inclusion criteria comprised the involvement of DLD intervention, the use of recasting alone or predominantly, and systematic manipulation of one or more dosage characteristics of recasting with the remaining parameters consistent across groups. Single-case experimental design studies were also included. Results: A total of 1,289 studies were included in the review, but only four articles met the criteria. Stratification analysis of an expanded set of 32 publications was then performed for effective dosage values, according to the way recasting was implemented. The effective quantitative dosage of recasting that has often been used is either an intervention duration > 8 weeks including a recast rate > 1.4/min within 30-min sessions, twice per week without high variability input, or a 5-week intervention including a recast rate of 0.8/min within 30-min sessions, five times per week with high variability input. Conclusions: Differences in the way dosage has been described and manipulated in the existing literature mean that the optimal dosage characteristics of recasting for DLD remain unknown. We propose ways to conceptualize dose and dose frequency to avoid ambiguities within the current framework of dosage. This review identifies ways that dosage characteristics of recasting for DLD can be manipulated and reported when designing interventions. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: Optimal Dosage Characteristics of Recasting for Developmental Language Disorder: A Scoping Review.
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  Data: <searchLink fieldCode="AR" term="%22Fan%2C+Shengfu%22">Fan, Shengfu</searchLink><relatesTo>1</relatesTo><i> shengfu.fan@utas.edu.au</i><br /><searchLink fieldCode="AR" term="%22Calder%2C+Samuel+D%2E%22">Calder, Samuel D.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kemp%2C+Nenagh%22">Kemp, Nenagh</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Holm%2C+Alison%22">Holm, Alison</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Speech%2C+Language+%26+Hearing+Research%22">Journal of Speech, Language & Hearing Research</searchLink>. Oct2025, Vol. 68 Issue 10, p4917-4941. 25p.
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  Data: *<searchLink fieldCode="DE" term="%22Developmental+disabilities%22">Developmental disabilities</searchLink><br />*<searchLink fieldCode="DE" term="%22Speech+therapy%22">Speech therapy</searchLink><br />*<searchLink fieldCode="DE" term="%22Evaluation%22">Evaluation</searchLink><br /><searchLink fieldCode="DE" term="%22Word+deafness%22">Word deafness</searchLink><br /><searchLink fieldCode="DE" term="%22Treatment+effectiveness%22">Treatment effectiveness</searchLink><br /><searchLink fieldCode="DE" term="%22Systematic+reviews%22">Systematic reviews</searchLink><br /><searchLink fieldCode="DE" term="%22MEDLINE%22">MEDLINE</searchLink><br /><searchLink fieldCode="DE" term="%22Medical+databases%22">Medical databases</searchLink><br /><searchLink fieldCode="DE" term="%22Psychology+information+storage+%26+retrieval+systems%22">Psychology information storage & retrieval systems</searchLink>
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  Data: Purpose: The purpose of this scoping review was to map and summarize currently available evidence about optimal dosage of recasting for developmental language disorder (DLD). Method: A systematic search of databases was completed, including Web of Science, Medline via OvidSP, PsycINFO, Cochrane Library, and Scopus. The inclusion criteria comprised the involvement of DLD intervention, the use of recasting alone or predominantly, and systematic manipulation of one or more dosage characteristics of recasting with the remaining parameters consistent across groups. Single-case experimental design studies were also included. Results: A total of 1,289 studies were included in the review, but only four articles met the criteria. Stratification analysis of an expanded set of 32 publications was then performed for effective dosage values, according to the way recasting was implemented. The effective quantitative dosage of recasting that has often been used is either an intervention duration > 8 weeks including a recast rate > 1.4/min within 30-min sessions, twice per week without high variability input, or a 5-week intervention including a recast rate of 0.8/min within 30-min sessions, five times per week with high variability input. Conclusions: Differences in the way dosage has been described and manipulated in the existing literature mean that the optimal dosage characteristics of recasting for DLD remain unknown. We propose ways to conceptualize dose and dose frequency to avoid ambiguities within the current framework of dosage. This review identifies ways that dosage characteristics of recasting for DLD can be manipulated and reported when designing interventions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Oct2025
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