Παρασκευή 6 Ιουλίου 2018

Short-Term Memory, Inhibition, and Attention in Developmental Stuttering: A Meta-Analysis

Purpose
This study presents a meta-analytic review of differences in verbal short-term memory, inhibition, and attention between children who stutter (CWS) and children who do not stutter (CWNS).
Method
Electronic databases and reference sections of articles were searched for candidate studies that examined verbal short-term memory, inhibition, and attention using behavioral and/or parent report measures. Twenty-nine studies met the eligibility criteria, which included, among other things, children between the ages of 3 and 18 years and the availability of quantitative data for effect size calculations. Data were extracted, coded, and analyzed, with the magnitude of the difference between the 2 groups of children being estimated using Hedge's g (Hedges & Olkin, 1985).
Results
Based on the random-effects model (Hunter & Schmidt, 2004), findings revealed that CWS scored lower than CWNS on measures of nonword repetition (Hedges' g = −0.62), particularly at lengths of 2 and 3 syllables (Hedges' g = −0.62 and − 0.50, respectively), and forward span (Hedges' g = −0.40). Analyses further revealed that the parents of CWS rated their children as having weaker inhibition (Hedges' g = −0.44) and attentional focus/persistence (Hedges' g = −0.36) skills than the parents of CWNS, but there were no significant differences between CWS and CWNS in behavioral measures of inhibition and attention.
Conclusion
The present findings were taken to suggest that cognitive processes are important variables associated with developmental stuttering.

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