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See detailEtude des traitements numériques de base dans le syndrome 22q11: Impact des troubles visuo-spatiaux
Attout, Lucie ULg; Noël, Marie-Pascale; Vossius, Line ULg et al

Conference (2017, April 22)

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See detailThe role of short-term memory and visuo-spatial skills in numerical magnitude processing: evidence from Turner syndrome
Attout, Lucie ULg; Noël, Marie-Pascale; Nassogne, Marie-Cécile et al

in PLoS ONE (2017), 12(2), 0171454

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See detailEvidence of the impact of visuo-spatial processing on magnitude representation in 22q11.2 microdeletion syndrome.
Attout, Lucie ULg; Noël, Marie-Pascale; Vossius, Line ULg et al

in Neuropsychologia (2017), 99

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See detailVisuo-spatial STM impairment link to a serial order component deficit in children with Velocardiofacial syndrome
Attout, Lucie ULg; Vossius, Line ULg; Noël, Marie-Pascale et al

Poster (2016, September 01)

Some previous studies showed that verbal short-term memory (STM) is better preserved than visuospatial STM in the velocardiofacial syndrome (VCFS), a neurodevelopmental disorder resulting from a 22q11.2 ... [more ▼]

Some previous studies showed that verbal short-term memory (STM) is better preserved than visuospatial STM in the velocardiofacial syndrome (VCFS), a neurodevelopmental disorder resulting from a 22q11.2 deletion. This deficit is generally assigned to a more global visuospatial skills deficit. However, for verbal STM, previous study suggested a specific deficit in the serial order component, processing considered as independent of modalities. In this study we proposed to explore the serial order component in visuospatial STM by contrasting simultaneous vs. sequential presentation of stimuli to maintain in children with VCFS, in order to see in what extent the deficit is global and resulting from visuospatial deficit or whether this deficit is specific to the serial order component. We tested a group of 27 children and adolescents with VCFS to a control group, matched on verbal IQ performance estimated. The VCFS group showed impaired performance on the sequential configuration but similar performance on the simultaneous condition. These results support the idea of an amodal serial order component in STM. The implication of serial order STM deficits on numerical cognition will be discussed. [less ▲]

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See detailThe implication of short-term memory in numerical magnitude processing: evidence from Turner syndrome
Attout, Lucie ULg; Noël, Marie-Pascale; Rousselle, Laurence ULg

Poster (2016, June 24)

Most studies on early magnitude representation focused on the visual modality with no possibility to disentangle the influence of visuo-spatial skills and short-term memory (STM) abilities on visual ... [more ▼]

Most studies on early magnitude representation focused on the visual modality with no possibility to disentangle the influence of visuo-spatial skills and short-term memory (STM) abilities on visual quantification processes. In order to specify the influence of visuo-spatial and STM processing on numerical abilities, a series of magnitudes comparison tasks differing on visuo-spatial processing requirement (no/high), on the nature of the magnitude to be processed (continuous/discrete/symbolic magnitude) and on WM demands (simultaneous/sequential presentation) were administred to twenty patients with Turner syndrome (TS), a genetic condition characterized by poor mathematical achievement, low spatial skills and reduced STM abilities. Our results showed a lower acuity than a control group matched on verbal IQ when participants with TS compared the numerical magnitudes of stimuli presented sequentially (low visuo-spatial processing and high STM load: Dot sequence and Sound sequence). No difference was observed in the numerical comparison of sets presented simultaneously or when comparing continuous and symbolic magnitude stimuli. Besides, the group difference in sequential tasks disappeared when controlling for STM abilities. These results highlight the importance of STM abilities to extract numerosity through a sequential presentation and underline the importance of considering the impact of format presentation on magnitude judgments. [less ▲]

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See detailThe implication of short-term memory in numerical magnitude processing: evidence from Turner syndrome
Attout, Lucie ULg; Noël, Marie-Pascale; Rousselle, Laurence ULg

Conference (2016, April 21)

Most studies on early magnitude representation focused on the visual modality with no possibility to disentangle the influence of visuo-spatial skills and short-term memory (STM) abilities on visual ... [more ▼]

Most studies on early magnitude representation focused on the visual modality with no possibility to disentangle the influence of visuo-spatial skills and short-term memory (STM) abilities on visual quantification processes. In order to specify the influence of visuo-spatial and STM processing on numerical abilities, a series of magnitudes comparison tasks differing on visuo-spatial processing requirement (no/high), on the nature of the magnitude to be processed (continuous/discrete/symbolic magnitude) and on WM demands (simultaneous/sequential presentation) were administred to twenty patients with Turner syndrome (TS), a genetic condition characterized by poor mathematical achievement, low spatial skills and reduced STM abilities. Our results showed a lower acuity than a control group matched on verbal IQ when participants with TS compared the numerical magnitudes of stimuli presented sequentially (low visuo-spatial processing and high STM load: Dot sequence and Sound sequence). No difference was observed in the numerical comparison of sets presented simultaneously or when comparing continuous and symbolic magnitude stimuli. Besides, the group difference in sequential tasks disappeared when controlling for STM abilities. These results highlight the importance of STM abilities to extract numerosity through a sequential presentation and underline the importance of considering the impact of format presentation on magnitude judgments. [less ▲]

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See detailWorking memory deficits in developmental dyscalculia: the importance of serial order.
Attout, Lucie ULg; Majerus, Steve ULg

in Child Neuropsychology : A Journal on Normal & Abnormal Development in Childhood & Adolescence (2015), 21

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See detailThe heterogeneity of verbal short-term memory impairment in aphasia
Majerus, Steve ULg; Attout, Lucie ULg; Artielle, Marie-Amélie et al

in Neuropsychologia (2015), 77

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See detailThe relationship between working memory for serial order and numerical development: a longitudinal study
Attout, Lucie ULg; Noël, Marie-Pascale; Majerus, Steve ULg

in Developmental Psychology (2014), 50(6), 1667-1679

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See detailSerial order working memory is impaired in developmental dyscalculia
Attout, Lucie ULg

Conference (2013, September 21)

Several studies explored associations between impairments in verbal working memory (WM) and numerical cognition, but with inconclusive findings. The present study explored verbal WM impairment in children ... [more ▼]

Several studies explored associations between impairments in verbal working memory (WM) and numerical cognition, but with inconclusive findings. The present study explored verbal WM impairment in children with developmental dyscalculia, by adopting the critical distinction between WM for item information (the items to be retained) and WM for order information (the order of the items within a list). We hypothesized that especially WM for order should be related to impaired numerical abilities, given that recent studies suggest close interactions between the representation of order information in WM and ordinal numerical processing. We investigated item and order WM capacities as well as basic numerical processing abilities in 16 children with dyscalculia (age: 8-11 years) and 16 typically developing children matched on age, IQ and reading abilities. WM for order information was assessed via a serial order reconstruction task which maximized serial order storage requirements. WM for item information was assessed using a single monosyllabic nonword delayed repetition maximizing phonological item processing. We observed that the group with dyscalculia performed significantly slower than the control group in symbolic order and magnitude judgment task, while not being slowed on general measures of processing speed. Dyscalculic participants also performed significantly poorer and with less precision than controls in the order WM task, but not in the item WM task. These results highlight a specific impairment for WM for serial order in dyscalculia, and could reflect a more general serial order processing impairment for both WM and numerical domains. [less ▲]

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See detailThe Importance of Encoding-Related Neural Dynamics in the Prediction of Inter-Individual Differences in Verbal Working Memory Performance
Majerus, Steve ULg; Salmon, Eric ULg; Attout, Lucie ULg

in PLoS ONE (2013), 8(7),

Studies of brain-behaviour interactions in the field of working memory (WM) have associated WM success with activation of a fronto-parietal network during the maintenance stage, and this mainly for visuo ... [more ▼]

Studies of brain-behaviour interactions in the field of working memory (WM) have associated WM success with activation of a fronto-parietal network during the maintenance stage, and this mainly for visuo-spatial WM. Using an inter-individual differences approach, we demonstrate here the equal importance of neural dynamics during the encoding stage, and this in the context of verbal WM tasks which are characterized by encoding phases of long duration and sustained attentional demands. Participants encoded and maintained 5-word lists, half of them containing an unexpected word intended to disturb WM encoding and associated task-related attention processes. We observed that inter-individual differences in WM performance for lists containing disturbing stimuli were related to activation levels in a region previously associated with task-related attentional processing, the left intraparietal sulcus (IPS), and this during stimulus encoding but not maintenance; functional connectivity strength between the left IPS and lateral prefrontal cortex (PFC) further predicted WM performance. This study highlights the critical role, during WM encoding, of neural substrates involved in task-related attentional processes for predicting inter-individual differences in verbal WM performance, and, more generally, provides support for attention-based models of WM. © 2013 Majerus et al. [less ▲]

Detailed reference viewed: 85 (8 ULg)