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A Comparison Of The Storage-Only Deficit And Joint Mechanism Deficit Hypotheses Of The Verbal Working Memory Storage Capacity Limitation Of Children With Developmental Language Disorder, James W. Montgomery, Ronald B. Gillam, Julia L. Evans, Sarah Schwartz, Jamison D. Fargo
A Comparison Of The Storage-Only Deficit And Joint Mechanism Deficit Hypotheses Of The Verbal Working Memory Storage Capacity Limitation Of Children With Developmental Language Disorder, James W. Montgomery, Ronald B. Gillam, Julia L. Evans, Sarah Schwartz, Jamison D. Fargo
Communicative Disorders and Deaf Education Faculty Publications
Purpose: The storage-only deficit and joint mechanism deficit hypotheses are two possible explanations of the verbal working memory (vWM) storage capacity limitation of school-age children with developmental language disorder (DLD). We assessed the merits of each hypothesis in a large group of children with DLD and a group of same-age typically developing (TD) children.
Method: Participants were 117 children with DLD and 117 propensity-matched TD children 7-11 years of age. Children completed tasks indexing vWM capacity, verbal short-term storage, sustained attention, attention switching, and lexical long-term memory (LTM).
Results: For the DLD group, all of the mechanisms jointly explained 26.5% …