Verbal contingencies in the Lidcombe Program : A noninferiority trial

Journal article


Donaghy, Michelle, O'Brian, Sue, Onslow, Mark, Lowe, Robyn, Jones, Mark and Menzies Ross, G.. (2020). Verbal contingencies in the Lidcombe Program : A noninferiority trial. Journal of Speech, Language, and Hearing Research. 63(10), pp. 3419-3431. https://doi.org/10.1044/2020_JSLHR-20-00155
AuthorsDonaghy, Michelle, O'Brian, Sue, Onslow, Mark, Lowe, Robyn, Jones, Mark and Menzies Ross, G.
Abstract

Purpose
The Lidcombe Program is an efficacious and effective intervention for early stuttering. The treatment is based on parent verbal response contingent stimulation procedures, which are assumed to be responsible for treatment effect. The present trial tested this assumption.

Method
The design was a parallel, open plan, noninferiority randomized controlled trial. In the experimental arm, the five Lidcombe Program verbal contingencies were removed from parent instruction. The primary outcome was beyond-clinic percentage syllables stuttered at 18-month follow-up. Seventy-four children and their parents were randomized to one of the two treatment arms.

Results
Findings of noninferiority were inconclusive for the primary outcome of stuttering severity, based on a margin of 1.0 percentage syllables stuttered.

Conclusions
The inconclusive finding of noninferiority means it is possible that verbal contingencies make some contribution to the Lidcombe Program treatment effect. However, considering all primary and secondary outcomes, an overriding impression from the trial is a similarity of outcomes between the control and experimental arms. The clinical applications of the trial are discussed, along with further research that is needed.

Year2020
JournalJournal of Speech, Language, and Hearing Research
Journal citation63 (10), pp. 3419-3431
PublisherAmerican Speech - Language - Hearing Association
ISSN1092-4388
Digital Object Identifier (DOI)https://doi.org/10.1044/2020_JSLHR-20-00155
Scopus EID2-s2.0-85092587747
Research or scholarlyResearch
Page range3419-3431
Publisher's version
License
All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online21 Sep 2020
Publication process dates
Accepted25 Jul 2020
Deposited23 Aug 2021
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https://acuresearchbank.acu.edu.au/item/8wq19/verbal-contingencies-in-the-lidcombe-program-a-noninferiority-trial

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