Treatment of Underlying Forms: A Bayesian Meta-Analysis of the Effects of Treatment and Person-Related Variables on Treatment Response

Journal of Speech, Language, and Hearing Research

Swiderski, A. M., Quique, Y. M., et al. (2021).

Journal of Speech, Language, and Hearing Research, 64(1), 4308-4328.

This systematic review and meta-analysis investigates the effect of "treatment of underlying forms", a sentence production and comprehension treatment, for sentence-level deficits in people with aphasia.

Not stated

Not stated

Single-subject experimental design studies

13

For patients with aphasia, a meta-analysis of 13 studies found that using treatment of underlying forms (TUF), improved treated sentence production after one treatment session (&beta;= 3.46). Additional findings included:<br /> <ul> <li><span style="color: #333333;">Each additional treatment session improved the odds of correct responses by 1.9 times. </span></li> <li><span style="color: #333333;">Participants also improved untreated sentence production after one TUF treatment session (&beta;= 0.6), however, there was no dose effect for untreated stimuli. </span></li> <li><span style="color: #333333;">Faster increases were noted in probe accuracy for less complex sentences the same general structure as the treatment stimuli (&beta;= 0.35).</span></li> <li><span style="color: #333333;">Individuals with milder aphasia demonstrated greater increases in TUF probe accuracy for both treated and untreated sentences (&beta;= 0.03).</span></li> <li><span style="color: #333333;">Greater time post-onset was associated with lesser gains in TUF probe accuracy during treatment, with this effect being larger for treated than untreated stimuli (&beta; = &minus;0.13).</span></li> </ul> <span style="color: #333333;">Limitations to this review include limited research with a homogenous sample (i.e., individuals with mild to moderate Broca's/aggrammatical aphasia).</span>