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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
In: Communicative Disorders and Deaf Education Faculty Publications (2019)
Abstract: 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% of total variance. Storage accounted for the greatest portion (13.7%), followed by controlled attention (primarily sustained attention 6.5%), and then lexical LTM (5.6%). For the TD group, all three mechanisms together explained 43.9% of total variance. Storage accounted for the most variance (19.6%), followed by lexical LTM (16.0%), sustained attention (5.4%), and attention switching (3.0%). There was a significant LTM by Group interaction in which stronger LTM scores were associated with significantly higher vWM capacity scores for the TD group as compared to the DLD group. Conclusions: Results support a joint mechanism deficit account of the vWM capacity limitation of children with DLD. Results provide substantively new insights into the underlying factors of the vWM capacity limitation in DLD.
Keyword: Communication Sciences and Disorders; controlled attention; developmental language disorder; Speech Pathology and Audiology; working memory
URL: https://digitalcommons.usu.edu/comd_facpub/511
https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1510&context=comd_facpub
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2
Cultural adaptation of the Test of Narrative Language (TNL) into Brazilian Portuguese
In: Communicative Disorders and Deaf Education Faculty Publications (2016)
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3
“Whatdunit?” Developmental changes in children's syntactically based sentence interpretation abilities and sensitivity to word order
In: Communicative Disorders and Deaf Education Faculty Publications (2015)
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4
Risk For Poor Performance On A Language Screening Measure For Bilingual Preschoolers And Kindergarteners
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5
Content andForm Interactions in the Narratives of Children with Specific Language Impairment
In: Communicative Disorders and Deaf Education Faculty Publications (2011)
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6
The Effects of Literate Narrative Intervention on Children with Neurologically Based Language Impairments: An Early State Study
In: Communicative Disorders and Deaf Education Faculty Publications (2010)
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7
Bilingual Performanceon Nonword Repetition in Spanish and English
In: Communicative Disorders and Deaf Education Faculty Publications (2010)
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8
Speaking Rate Characteristicsof Elementary-School-Aged Children Who Do and Do not Stutter
In: Communicative Disorders and Deaf Education Faculty Publications (2010)
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9
What YouHear and What You Say: Language Performance in Early Sequential Spanish EnglishBilinguals
In: Communicative Disorders and Deaf Education Faculty Publications (2010)
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10
Language Sample Measures andLanguage Ability in Spanish English Bilingual Kindergarteners
In: Communicative Disorders and Deaf Education Faculty Publications (2010)
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11
The Expressive Elaboration of Imaginative Narratives by Children with Specific Language Impairment.
In: Communicative Disorders and Deaf Education Faculty Publications (2009)
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12
The Effects of Fast ForWord-Language on the Phonemic Awareness and Reading Skills of School-Age Children with Language Impairments and Poor Reading Skills.
In: Communicative Disorders and Deaf Education Faculty Publications (2009)
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13
Language Intervention Practices with School-Age Children with Spoken Language Disorders: A Systematic Review.
In: Communicative Disorders and Deaf Education Faculty Publications (2008)
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14
Noun Phrase Elaboration in Children’s Spoken Stories.
In: Communicative Disorders and Deaf Education Faculty Publications (2008)
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15
The Efficacy of Fast ForWord-Language Intervention in School-Age Children with Language Impairment: A Randomized Clinical Trial.
In: Communicative Disorders and Deaf Education Faculty Publications (2008)
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16
Retelling a Script-Based Story: Do Children with and without Language Impairments Focus on Script and Story Elements?
In: Communicative Disorders and Deaf Education Faculty Publications (2007)
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17
The Role of Clinical Judgments of Modifiabilityin the Diagnosis of Language Impairment
In: Communicative Disorders and Deaf Education Faculty Publications (2007)
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18
The Index Of Narrative Microstructure: A Clinical Tool For Analyzing School-Age Children's Narrative Performances
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19
Making Evidence-Based Decisions about Child Language Intervention in Schools.
In: Communicative Disorders and Deaf Education Faculty Publications (2006)
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20
The Index of Narrative Micro-Structure (INMIS): A Clinical Tool for Analyzing School-Age Children’s Narrative Performance.
In: Communicative Disorders and Deaf Education Faculty Publications (2006)
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