Longitudinal relationships between language and verbal short-term memory skills in children with Down syndrome

Naess, K; Lervåg, Arne; Lyster, Solveig‐Alma Halaas; Hulme, Charles

doi:10.1016/j.jecp.2015.02.004

Cited by 46 publications

(26 citation statements)

References 44 publications

(46 reference statements)

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“…The results of this study align with earlier longitudinal studies that have found increasing receptive vocabulary in the childhood period for children with DS (Kay‐Raining Bird et al, ; Næss et al, ). Cross‐sectional studies in adulthood have generally indicated a decrease in receptive vocabulary with age (Carter‐Young & Kramer, ; Cooper & Collacot, 1995) as found in the current study.…”

Section: Discussionsupporting

confidence: 91%

“…Næss, Lervåg, Lyster, and Hulme () used the Norwegian version of the PPVT (Lyster et al, ) to measure receptive vocabulary in 57 typically developing children and in 43 children with DS, matched on nonverbal ability. At the beginning of the study, the children with DS were 6 years of age while the children in the typically developing group had a mean CA of 3 years.…”

Section: Introductionmentioning

confidence: 99%

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Trajectories of Development of Receptive Vocabulary in Individuals with Down Syndrome

Cuskelly

Povey

Jobling

2016

Policy Practice Intel Disabi

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Receptive vocabulary is an important aspect of cognitive functioning. It appears to be a relative strength with respect to language for individuals with Down syndrome (DS) but little is known about its development as individuals mature. This study was designed to establish the developmental trajectory of receptive language development in individuals with DS from early childhood to midadulthood. Two hundred and six individuals with DS provided Peabody Picture Vocabulary Test (PPVT) scores on 957 occasions, spanning ages from 2 years 7 months to 29 years 7 months. Latent growth curve models were used to establish the trajectory of receptive vocabulary. Gender, maternal education, cohort, and nonverbal intellectual ability were used as predictors of rate of development. Receptive vocabulary was found to increase until around 20 years of age when performance on the PPVT began to deteriorate. The only variable measured that was associated with PPVT performance was nonverbal ability. The rate of increase in receptive vocabulary in individuals with DS across the childhood and adolescent period appears to be slower than for those who are developing typically, and the expected influence of maternal education was not found. The small number of participants contributing data in the older ages included in this study means that the apparent decline in receptive vocabulary scores needs to be interpreted cautiously.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Trajectories of Development of Receptive Vocabulary in Individuals with Down Syndrome

Cuskelly

Povey

Jobling

2016

Policy Practice Intel Disabi

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“…DS group did perform better on visual task with additional spatial support. Costanzo 2013 [ 90 ] WS group NVMA-matched TD Leiter-Revised or SB (1 child matched with SB, all others matched on Leiter-R) M=14.5 (Range=8-21) M=6.2 Verbal & Spatial STM Digit Span Recall Nonword Repetition Corsi Span Task DS < WS & TD-NVMA DS < WS & TD- NVMA DS & WS < TD- NVMA; DS ~ WS Carney 2013 [ 92 ] WS group TD participants with similar MA SB Abbreviated Battery M=14.5 (Range=10-21) M=6.0 Verbal & Spatial STM Word List Recall Block Recall DS~WS~TD DS ~ TD; DS & TD> WS DS Group– Visuospatial > Verbal Carretti 2013 [ 94 ] VMA-matched TD PPVT-Revised M=14.17 (Range=9-17) M=5.17 Spatial STM Spatial-Sequential Test Spatial-Simultaneous Test DS ~ TD-VMA DS < TD-VMA Lanfranchi 2014 [93] MA-matched TD Logical Operations Test M=15.66 (SD=3.08) M=5.75 Visual STM Picture Span Recall DS < TD-MA Naess 2015 [ 85 ] NVMA-matched TD WPPSI Block Design M=6.32 (Range=5-6) -- Verbal STM Sentence Memory Nonword Repetition DS < TD-NVMA DS < TD- NVMA Lanfranchi 2015 [ 184 ] MA-matched TD PPVT-Revised RCM M=14.17 (Range=9-17) M=5.17 Spatial STM Patterned Spatial Recall Random Spatial Recall DS < TD-MA DS ~ TD-MA Loveall 2016 [ 185 ] TD & ID with similar NVMA (measured with the Leiter-R) M=14.91 M=5.35 Verbal STM Nonword repetition DS < TD-NVMA & ID group ...…”

Section: Literature Review and Analytic Methodsmentioning

confidence: 99%

Memory profiles in Down syndrome across development: a review of memory abilities through the lifespan

Godfrey

Lee

2018

J Neurodevelop Disord

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Down syndrome (DS) is associated with a variety of cognitive impairments, notably memory impairments. Due to the high prevalence rates of early-onset dementia associated with DS, it is imperative to understand the comprehensive development of memory impairments beginning in childhood and into adulthood, as this may help researchers identify precursors of dementia at earlier stages of development and pinpoint targets for memory intervention. The current paper provides a systematic, developmentally focused review of the nature of memory difficulties in DS across the lifespan. Specifically, this review summarizes what is known about long-term, short-term, and working memory abilities (distinguishing between verbal and nonverbal modalities) in DS, compared to both mental age-matched typically developing peers and individuals with other forms of intellectual disability (ID) at three developmental stages (i.e., preschool, adolescence, and adulthood). Additionally, this review examines the degree of impairment reported relative to typically developing mental age-matched peers in the existing literature by examining effect size data across memory domains as a function of age. With few exceptions, memory abilities were impaired across the lifespan compared to mental age-matched typically developing peers. Relative to other groups with ID, research findings are mixed. Our review of the literature identified a scarcity of memory studies in early childhood, particularly for STM and WM. In adulthood, research was limited in the LTM and WM domains and very little research has compared memory abilities in older adults with DS to those with typical development. Looking to the future, longitudinal studies could provide a better understanding of the developmental trajectory of memory abilities in DS, and the possible associations between memory abilities and real-world functioning. This research could ultimately inform interventions to improve independence and overall quality of life for those with DS and their families.

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“…Mosse and Jarrold (2011) observed that novel word learning abilities can be preserved in children and adults with DS, despite the existence of severe verbal STM limitations. In the same vein, Naess et al (2015) did not observe any specific longitudinal relationship between verbal STM measures and later vocabulary knowledge in children with DS, after controlling for initial vocabulary knowledge.…”

Section: Introductionmentioning

confidence: 68%

“…At the same time, our findings may not be specific to DS, given that the same argumentation can also be applied to the large set of studies that have investigated the association between receptive vocabulary development and verbal STM in typically developing populations, as these studies also used the PPVT/EVIP multi-picture vocabulary task (e.g. Gathercole et al 1992;Naess et al 2015;Majerus et al 2006;Leclercq & Majerus 2010). For typically developing populations, studies exploring STM/vocabulary associations with productive vocabulary tasks that have no intrinsic STM load are lacking and need urgently need to be conducted; existing studies exploring the role of STM in productive lexical measures used novel word learning tasks that also have an intrinsic STM load (e.g.…”

Section: Discussionmentioning

confidence: 91%

Verbal short‐term memory shows a specific association with receptive but not productive vocabulary measures in Down syndrome

Majerus

Barisnikov

2017

J intellect Disabil Res

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Background Verbal short-term memory (STM) capacity has been considered to support vocabulary learning in typical children and adults, but evidence for this link is inconsistent for studies in individuals with Down syndrome (DS). The aim of this study was explore the role of processing demands on the association between verbal STM and vocabulary measures in DS, by comparing receptive vocabulary measures with high STM processing demands to productive vocabulary measures with low STM processing demands. Method Forty-seven adults with Down syndrome were administered receptive vocabulary and productive vocabulary tasks, as well as measures of verbal STM abilities and intellectual efficiency. Results Bayesian regression analyses showed that verbal STM abilities were strongly and specifically associated with receptive vocabulary measures but not productive lexical abilities after controlling for intellectual efficiency, and this is despite the fact that vocabulary abilities as measured by receptive and productive vocabulary tasks were closely associated.

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Longitudinal relationships between language and verbal short-term memory skills in children with Down syndrome

Cited by 46 publications

References 44 publications

Trajectories of Development of Receptive Vocabulary in Individuals with Down Syndrome

Trajectories of Development of Receptive Vocabulary in Individuals with Down Syndrome

Memory profiles in Down syndrome across development: a review of memory abilities through the lifespan

Verbal short‐term memory shows a specific association with receptive but not productive vocabulary measures in Down syndrome

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