Are numerical impairments syndrome specific? Evidence from Williams syndrome and Down's syndrome / Sarah J. PATERSON in Journal of Child Psychology and Psychiatry, 47-2 (February 2006)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 47-2 (February 2006) . - p.190–204 Titre : Are numerical impairments syndrome specific? Evidence from Williams syndrome and Down's syndrome Type de document : Texte imprimé et/ou numérique Auteurs : Sarah J. PATERSON, Auteur ; Luisa GIRELLI, Auteur ; Brian BUTTERWORTH, Auteur ; Annette KARMILOFF-SMITH, Auteur Année de publication : 2006 Article en page(s) : p.190–204 Langues : Anglais (eng) Mots-clés : Williams-syndrome Down's-syndrome number-development adults infants Index. décimale : PER Périodiques Résumé : Background: Several theorists maintain that exact number abilities rely on language-relevant processes whereas approximate number calls on visuo-spatial skills. We chose two genetic disorders, Williams syndrome and Down's syndrome, which differ in their relative abilities in verbal versus spatial skills, to examine this hypothesis. Five experiments assessed number skills in these two genetic syndromes and in their mental age (MA) and chronological age (CA) matched controls. Methods: Experiment 1 used a preferential looking paradigm with infants and toddlers to measure sensitivity to changes in numerosity. Experiment 2 measured reaction times in older children and adults in a numerosity comparison task with dots in a random pattern. Experiment 3 comprised a number battery that measured various forms of counting and simple arithmetic. Results: The WS infants displayed a level of performance equal to that of their CA-controls, whereas the DS infants failed to reach even the level of their MA-controls. By contrast, the older DS children and adults outstripped the older WS group in their numerosity abilities, with different patterns of errors in the two clinical groups. Conclusions: Differences in the infant and adult number phenotypes between these two genetic disorders are discussed with reference to the processing styles used by each group and how these might impact on their developmental trajectories. Theoretically, we highlight our contention that one cannot infer the infant starting state from the adult end state. Rather, the development process itself must be taken into account. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2005.01460.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=717 [article] Are numerical impairments syndrome specific? Evidence from Williams syndrome and Down's syndrome [Texte imprimé et/ou numérique] / Sarah J. PATERSON, Auteur ; Luisa GIRELLI, Auteur ; Brian BUTTERWORTH, Auteur ; Annette KARMILOFF-SMITH, Auteur . - 2006 . - p.190–204. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 47-2 (February 2006) . - p.190–204 Mots-clés : Williams-syndrome Down's-syndrome number-development adults infants Index. décimale : PER Périodiques Résumé : Background: Several theorists maintain that exact number abilities rely on language-relevant processes whereas approximate number calls on visuo-spatial skills. We chose two genetic disorders, Williams syndrome and Down's syndrome, which differ in their relative abilities in verbal versus spatial skills, to examine this hypothesis. Five experiments assessed number skills in these two genetic syndromes and in their mental age (MA) and chronological age (CA) matched controls. Methods: Experiment 1 used a preferential looking paradigm with infants and toddlers to measure sensitivity to changes in numerosity. Experiment 2 measured reaction times in older children and adults in a numerosity comparison task with dots in a random pattern. Experiment 3 comprised a number battery that measured various forms of counting and simple arithmetic. Results: The WS infants displayed a level of performance equal to that of their CA-controls, whereas the DS infants failed to reach even the level of their MA-controls. By contrast, the older DS children and adults outstripped the older WS group in their numerosity abilities, with different patterns of errors in the two clinical groups. Conclusions: Differences in the infant and adult number phenotypes between these two genetic disorders are discussed with reference to the processing styles used by each group and how these might impact on their developmental trajectories. Theoretically, we highlight our contention that one cannot infer the infant starting state from the adult end state. Rather, the development process itself must be taken into account. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2005.01460.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=717

Attention across modalities as a longitudinal predictor of early outcomes: the case of fragile X syndrome / Gaia SCERIF in Journal of Child Psychology and Psychiatry, 53-6 (June 2012)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 53-6 (June 2012) . - p.641–650 Titre : Attention across modalities as a longitudinal predictor of early outcomes: the case of fragile X syndrome Type de document : Texte imprimé et/ou numérique Auteurs : Gaia SCERIF, Auteur ; Elena LONGHI, Auteur ; Victoria COLE, Auteur ; Annette KARMILOFF-SMITH, Auteur ; Kim CORNISH, Auteur Année de publication : 2012 Article en page(s) : p.641–650 Langues : Anglais (eng) Mots-clés : Fragile X syndrome  attention deficits  longitudinal predictors of outcomes Index. décimale : PER Périodiques Résumé : Background:  Fragile X syndrome (FXS) is an early diagnosed monogenic disorder, associated with a striking pattern of cognitive/attentional difficulties and a high risk of poor behavioural outcomes. FXS therefore represents an ideal model disorder to study prospectively the impact of early attention deficits on behaviour. Methods:  Thirty-seven boys with FXS aged 4–10 years and 74 typically developing (TD) boys took part. Study 1 was designed to assess visual and auditory attention at two time-points, 1 year apart. Study 2 investigated attention to multimodal information. Both tested attention markers as longitudinal predictors of risk for poor behaviour in FXS. Results:  Children with FXS attended less well than mental-age matched TD boys and experienced greater difficulties with auditory compared to visual stimuli. In addition, unlike TD children, they did not benefit from multimodal information. Attention markers were significant predictors of later behavioural difficulties in boys with FXS. Conclusions:  Findings demonstrate, for the first time, greater difficulties with auditory attention and atypical processing of multimodal information, in addition to pervasive global attentional difficulties in boys with FXS. Attention predicted outcomes longitudinally, underscoring the need to dissect what drives differing developmental trajectories for individual children within a seemingly homogeneous group. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02515.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=157 [article] Attention across modalities as a longitudinal predictor of early outcomes: the case of fragile X syndrome [Texte imprimé et/ou numérique] / Gaia SCERIF, Auteur ; Elena LONGHI, Auteur ; Victoria COLE, Auteur ; Annette KARMILOFF-SMITH, Auteur ; Kim CORNISH, Auteur . - 2012 . - p.641–650. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 53-6 (June 2012) . - p.641–650 Mots-clés : Fragile X syndrome  attention deficits  longitudinal predictors of outcomes Index. décimale : PER Périodiques Résumé : Background:  Fragile X syndrome (FXS) is an early diagnosed monogenic disorder, associated with a striking pattern of cognitive/attentional difficulties and a high risk of poor behavioural outcomes. FXS therefore represents an ideal model disorder to study prospectively the impact of early attention deficits on behaviour. Methods:  Thirty-seven boys with FXS aged 4–10 years and 74 typically developing (TD) boys took part. Study 1 was designed to assess visual and auditory attention at two time-points, 1 year apart. Study 2 investigated attention to multimodal information. Both tested attention markers as longitudinal predictors of risk for poor behaviour in FXS. Results:  Children with FXS attended less well than mental-age matched TD boys and experienced greater difficulties with auditory compared to visual stimuli. In addition, unlike TD children, they did not benefit from multimodal information. Attention markers were significant predictors of later behavioural difficulties in boys with FXS. Conclusions:  Findings demonstrate, for the first time, greater difficulties with auditory attention and atypical processing of multimodal information, in addition to pervasive global attentional difficulties in boys with FXS. Attention predicted outcomes longitudinally, underscoring the need to dissect what drives differing developmental trajectories for individual children within a seemingly homogeneous group. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02515.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=157

Brief Report: Developing Spatial Frequency Biases for Face Recognition in Autism and Williams Syndrome / Hayley C. LEONARD in Journal of Autism and Developmental Disorders, 41-7 (July 2011)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 41-7 (July 2011) . - p.968-973 Titre : Brief Report: Developing Spatial Frequency Biases for Face Recognition in Autism and Williams Syndrome Type de document : Texte imprimé et/ou numérique Auteurs : Hayley C. LEONARD, Auteur ; Dagmara ANNAZ, Auteur ; Annette KARMILOFF-SMITH, Auteur ; Mark H. JOHNSON, Auteur Année de publication : 2011 Article en page(s) : p.968-973 Langues : Anglais (eng) Mots-clés : Face recognition  Spatial frequency  Development  Autism  Williams syndrome Index. décimale : PER Périodiques Résumé : The current study investigated whether contrasting face recognition abilities in autism and Williams syndrome could be explained by different spatial frequency biases over developmental time. Typically-developing children and groups with Williams syndrome and autism were asked to recognise faces in which low, middle and high spatial frequency bands were masked. All three groups demonstrated a gradual specialisation toward the mid-band. However, while the use of high spatial frequencies decreased in control and autism groups over development, the Williams syndrome group did not display a bias toward this band at any point. These data demonstrate that typical outcomes can be achieved through atypical developmental processes, and confirm the importance of cross-syndrome studies in the investigation of developmental disorders. En ligne : http://dx.doi.org/10.1007/s10803-010-1115-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=130 [article] Brief Report: Developing Spatial Frequency Biases for Face Recognition in Autism and Williams Syndrome [Texte imprimé et/ou numérique] / Hayley C. LEONARD, Auteur ; Dagmara ANNAZ, Auteur ; Annette KARMILOFF-SMITH, Auteur ; Mark H. JOHNSON, Auteur . - 2011 . - p.968-973. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 41-7 (July 2011) . - p.968-973 Mots-clés : Face recognition  Spatial frequency  Development  Autism  Williams syndrome Index. décimale : PER Périodiques Résumé : The current study investigated whether contrasting face recognition abilities in autism and Williams syndrome could be explained by different spatial frequency biases over developmental time. Typically-developing children and groups with Williams syndrome and autism were asked to recognise faces in which low, middle and high spatial frequency bands were masked. All three groups demonstrated a gradual specialisation toward the mid-band. However, while the use of high spatial frequencies decreased in control and autism groups over development, the Williams syndrome group did not display a bias toward this band at any point. These data demonstrate that typical outcomes can be achieved through atypical developmental processes, and confirm the importance of cross-syndrome studies in the investigation of developmental disorders. En ligne : http://dx.doi.org/10.1007/s10803-010-1115-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=130

Cascading Genetic and Environmental Effects on Development: Implications for Intervention / Esha MASSAND

Public ISBD in The Genetics of Neurodevelopmental Disorders / Kevin J. MITCHELL Titre : Cascading Genetic and Environmental Effects on Development: Implications for Intervention Type de document : Texte imprimé et/ou numérique Auteurs : Esha MASSAND, Auteur ; Annette KARMILOFF-SMITH, Auteur Année de publication : 2015 Importance : p.275-288 Langues : Anglais (eng) Index. décimale : SCI-B SCI-B - Génétique Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=400 in The Genetics of Neurodevelopmental Disorders / Kevin J. MITCHELL Cascading Genetic and Environmental Effects on Development: Implications for Intervention [Texte imprimé et/ou numérique] / Esha MASSAND, Auteur ; Annette KARMILOFF-SMITH, Auteur . - 2015 . - p.275-288. Langues : Anglais (eng) Index. décimale : SCI-B SCI-B - Génétique Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=400

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Eye Movement Patterns and Approximate Number Sense Task Performance in Williams Syndrome and Down Syndrome: A Developmental Perspective / J. VAN HERWEGEN in Journal of Autism and Developmental Disorders, 49-10 (October 2019)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 49-10 (October 2019) . - p.4030-4038 Titre : Eye Movement Patterns and Approximate Number Sense Task Performance in Williams Syndrome and Down Syndrome: A Developmental Perspective Type de document : Texte imprimé et/ou numérique Auteurs : J. VAN HERWEGEN, Auteur ; E. RANZATO, Auteur ; Annette KARMILOFF-SMITH, Auteur ; V. SIMMS, Auteur Article en page(s) : p.4030-4038 Langues : Anglais (eng) Mots-clés : Down syndrome  Eye movements  Number development  Williams syndrome Index. décimale : PER Périodiques Résumé : It has been reported that approximate number sense (ANS) task performance is impaired in individuals with Williams syndrome (WS) and Down syndrome (DS). Research with infants has suggested this impairment is caused by sticky fixation in WS and sustained attention deficits for those with DS. This study examined looking patterns of older children and adults with WS (n = 24) and DS (n = 23) during an ANS task compared to typically developing controls matched for chronological age and those matched for mental age. Results showed that, although there were no group differences, looking patterns changed with chronological age for both the WS and DS groups. Looking behaviour related to ANS performance only in the WS group. Implications for interventions are discussed. En ligne : http://dx.doi.org/10.1007/s10803-019-04110-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=407 [article] Eye Movement Patterns and Approximate Number Sense Task Performance in Williams Syndrome and Down Syndrome: A Developmental Perspective [Texte imprimé et/ou numérique] / J. VAN HERWEGEN, Auteur ; E. RANZATO, Auteur ; Annette KARMILOFF-SMITH, Auteur ; V. SIMMS, Auteur . - p.4030-4038. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 49-10 (October 2019) . - p.4030-4038 Mots-clés : Down syndrome  Eye movements  Number development  Williams syndrome Index. décimale : PER Périodiques Résumé : It has been reported that approximate number sense (ANS) task performance is impaired in individuals with Williams syndrome (WS) and Down syndrome (DS). Research with infants has suggested this impairment is caused by sticky fixation in WS and sustained attention deficits for those with DS. This study examined looking patterns of older children and adults with WS (n = 24) and DS (n = 23) during an ANS task compared to typically developing controls matched for chronological age and those matched for mental age. Results showed that, although there were no group differences, looking patterns changed with chronological age for both the WS and DS groups. Looking behaviour related to ANS performance only in the WS group. Implications for interventions are discussed. En ligne : http://dx.doi.org/10.1007/s10803-019-04110-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=407

Genetic contributions to visuospatial cognition in Williams syndrome: insights from two contrasting partial deletion patients / H. BROADBENT in Journal of Neurodevelopmental Disorders, 6-1 (December 2014)  

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Infant wake after sleep onset serves as a marker for different trajectories in cognitive development / M. PISCH in Journal of Child Psychology and Psychiatry, 60-2 (February 2019)  

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Learning to read in Williams syndrome and Down syndrome: syndrome-specific precursors and developmental trajectories / Ann STEELE in Journal of Child Psychology and Psychiatry, 54-7 (July 2013)  

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Mapping developmental trajectories of attention and working memory in fragile X syndrome: Developmental freeze or developmental change? / Kim CORNISH in Development and Psychopathology, 25-2 (May 2013)  

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Understanding Number Line Estimation in Williams Syndrome and Down Syndrome / V. SIMMS in Journal of Autism and Developmental Disorders, 50-2 (February 2020)  

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