Brief Report: Visual Processing of Faces in Individuals with Fragile X Syndrome: An Eye Tracking Study / Faraz FARZIN in Journal of Autism and Developmental Disorders, 39-6 (June 2009)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 39-6 (June 2009) . - p.946-952 Titre : Brief Report: Visual Processing of Faces in Individuals with Fragile X Syndrome: An Eye Tracking Study Type de document : Texte imprimé et/ou numérique Auteurs : Faraz FARZIN, Auteur ; David HESSL, Auteur ; Susan M. RIVERA, Auteur Année de publication : 2009 Article en page(s) : p.946-952 Langues : Anglais (eng) Mots-clés : Face-processing Fragile-X-syndrome FMR1-gene Eye-tracking Pupil-reactivity Index. décimale : PER Périodiques Résumé : Gaze avoidance is a hallmark behavioral feature of fragile X syndrome (FXS), but little is known about whether abnormalities in the visual processing of faces, including disrupted autonomic reactivity, may underlie this behavior. Eye tracking was used to record fixations and pupil diameter while adolescents and young adults with FXS and sex- and age-matched typically developing controls passively viewed photographs of faces containing either a calm, happy, or fearful expression, preceded by a scrambled face matched on luminance. Results provide quantitative evidence for significant differences in gaze patterns and increased pupillary reactivity when individuals with FXS passively view static faces. Such abnormalities have significant implications in terms of understanding causes of gaze avoidance observed in individuals with FXS. En ligne : http://dx.doi.org/10.1007/s10803-009-0744-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=759 [article] Brief Report: Visual Processing of Faces in Individuals with Fragile X Syndrome: An Eye Tracking Study [Texte imprimé et/ou numérique] / Faraz FARZIN, Auteur ; David HESSL, Auteur ; Susan M. RIVERA, Auteur . - 2009 . - p.946-952. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 39-6 (June 2009) . - p.946-952 Mots-clés : Face-processing Fragile-X-syndrome FMR1-gene Eye-tracking Pupil-reactivity Index. décimale : PER Périodiques Résumé : Gaze avoidance is a hallmark behavioral feature of fragile X syndrome (FXS), but little is known about whether abnormalities in the visual processing of faces, including disrupted autonomic reactivity, may underlie this behavior. Eye tracking was used to record fixations and pupil diameter while adolescents and young adults with FXS and sex- and age-matched typically developing controls passively viewed photographs of faces containing either a calm, happy, or fearful expression, preceded by a scrambled face matched on luminance. Results provide quantitative evidence for significant differences in gaze patterns and increased pupillary reactivity when individuals with FXS passively view static faces. Such abnormalities have significant implications in terms of understanding causes of gaze avoidance observed in individuals with FXS. En ligne : http://dx.doi.org/10.1007/s10803-009-0744-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=759

Exploring Sensory Subgroups in Typical Development and Autism Spectrum Development Using Factor Mixture Modelling / Patrick DWYER in Journal of Autism and Developmental Disorders, 52-9 (September 2022)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 52-9 (September 2022) . - p.3840-3860 Titre : Exploring Sensory Subgroups in Typical Development and Autism Spectrum Development Using Factor Mixture Modelling Type de document : Texte imprimé et/ou numérique Auteurs : Patrick DWYER, Auteur ; Emilio FERRER, Auteur ; Clifford D. SARON, Auteur ; Susan M. RIVERA, Auteur Article en page(s) : p.3840-3860 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder  Autistic Disorder  Child  Child Development Disorders, Pervasive  Humans  Auditory P1  Auditory event-related potentials (ERPs)  Autism  Factor mixture modelling  Heterogeneity  Sensory processing Index. décimale : PER Périodiques Résumé : This study uses factor mixture modelling of the Short Sensory Profile (SSP) at two time points to describe subgroups of young autistic and typically-developing children. This approach allows separate SSP subscales to influence overall SSP performance differentially across subgroups. Three subgroups were described, one including almost all typically-developing participants plus many autistic participants. SSP performance of a second, largely-autistic subgroup was predominantly shaped by a subscale indexing behaviours of low energy/weakness. Finally, the third subgroup, again largely autistic, contained participants with low (or more "atypical") SSP scores across most subscales. In this subgroup, autistic participants exhibited large P1 amplitudes to loud sounds. Autistic participants in subgroups with more atypical SSP scores had higher anxiety and more sleep disturbances. En ligne : http://dx.doi.org/10.1007/s10803-021-05256-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=485 [article] Exploring Sensory Subgroups in Typical Development and Autism Spectrum Development Using Factor Mixture Modelling [Texte imprimé et/ou numérique] / Patrick DWYER, Auteur ; Emilio FERRER, Auteur ; Clifford D. SARON, Auteur ; Susan M. RIVERA, Auteur . - p.3840-3860. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 52-9 (September 2022) . - p.3840-3860 Mots-clés : Autism Spectrum Disorder  Autistic Disorder  Child  Child Development Disorders, Pervasive  Humans  Auditory P1  Auditory event-related potentials (ERPs)  Autism  Factor mixture modelling  Heterogeneity  Sensory processing Index. décimale : PER Périodiques Résumé : This study uses factor mixture modelling of the Short Sensory Profile (SSP) at two time points to describe subgroups of young autistic and typically-developing children. This approach allows separate SSP subscales to influence overall SSP performance differentially across subgroups. Three subgroups were described, one including almost all typically-developing participants plus many autistic participants. SSP performance of a second, largely-autistic subgroup was predominantly shaped by a subscale indexing behaviours of low energy/weakness. Finally, the third subgroup, again largely autistic, contained participants with low (or more "atypical") SSP scores across most subscales. In this subgroup, autistic participants exhibited large P1 amplitudes to loud sounds. Autistic participants in subgroups with more atypical SSP scores had higher anxiety and more sleep disturbances. En ligne : http://dx.doi.org/10.1007/s10803-021-05256-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=485

Habituation of auditory responses in young autistic and neurotypical children / Patrick DWYER in Autism Research, 16-10 (October 2023)  

Public ISBD [article]  inAutism Research > 16-10 (October 2023) . - p.1903-1923 Titre : Habituation of auditory responses in young autistic and neurotypical children Type de document : Texte imprimé et/ou numérique Auteurs : Patrick DWYER, Auteur ; Zachary J. WILLIAMS, Auteur ; Svjetlana VUKUSIC, Auteur ; Clifford D. SARON, Auteur ; Susan M. RIVERA, Auteur Article en page(s) : p.1903-1923 Index. décimale : PER Périodiques Résumé : Abstract Prior studies suggest that habituation of sensory responses is reduced in autism and that diminished habituation could be related to atypical autistic sensory experiences, for example, by causing brain responses to aversive stimuli to remain strong over time instead of being suppressed. While many prior studies exploring habituation in autism have repeatedly presented identical stimuli, other studies suggest group differences can still be observed in habituation to intermittent stimuli. The present study explored habituation of electrophysiological responses to auditory complex tones of varying intensities (50-80?dB SPL), presented passively in an interleaved manner, in a well-characterized sample of 127 autistic (MDQ?=?65.41, SD?=?20.54) and 79 typically developing (MDQ?=?106.02, SD?=?11.50) children between 2 and 5?years old. Habituation was quantified as changes in the amplitudes of single-trial responses to tones of each intensity over the course of the experiment. Habituation of the auditory N2 response was substantially reduced in autistic participants as compared to typically developing controls, although diagnostic groups did not clearly differ in habituation of the P1 response. Interestingly, the P1 habituated less to loud 80?dB sounds than softer sounds, whereas the N2 habituated less to soft 50?dB sounds than louder sounds. No associations were found between electrophysiological habituation and cognitive ability or participants' caregiver-reported sound tolerance (Sensory Profile Hyperacusis Index). The results present study results extend prior research suggesting habituation of certain sensory responses is reduced in autism; however, they also suggest that habituation differences observed using this study's paradigm might not be a primary driver of autistic participants' real-world sound intolerance. En ligne : https://doi.org/10.1002/aur.3022 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=513 [article] Habituation of auditory responses in young autistic and neurotypical children [Texte imprimé et/ou numérique] / Patrick DWYER, Auteur ; Zachary J. WILLIAMS, Auteur ; Svjetlana VUKUSIC, Auteur ; Clifford D. SARON, Auteur ; Susan M. RIVERA, Auteur . - p.1903-1923. in Autism Research > 16-10 (October 2023) . - p.1903-1923 Index. décimale : PER Périodiques Résumé : Abstract Prior studies suggest that habituation of sensory responses is reduced in autism and that diminished habituation could be related to atypical autistic sensory experiences, for example, by causing brain responses to aversive stimuli to remain strong over time instead of being suppressed. While many prior studies exploring habituation in autism have repeatedly presented identical stimuli, other studies suggest group differences can still be observed in habituation to intermittent stimuli. The present study explored habituation of electrophysiological responses to auditory complex tones of varying intensities (50-80?dB SPL), presented passively in an interleaved manner, in a well-characterized sample of 127 autistic (MDQ?=?65.41, SD?=?20.54) and 79 typically developing (MDQ?=?106.02, SD?=?11.50) children between 2 and 5?years old. Habituation was quantified as changes in the amplitudes of single-trial responses to tones of each intensity over the course of the experiment. Habituation of the auditory N2 response was substantially reduced in autistic participants as compared to typically developing controls, although diagnostic groups did not clearly differ in habituation of the P1 response. Interestingly, the P1 habituated less to loud 80?dB sounds than softer sounds, whereas the N2 habituated less to soft 50?dB sounds than louder sounds. No associations were found between electrophysiological habituation and cognitive ability or participants' caregiver-reported sound tolerance (Sensory Profile Hyperacusis Index). The results present study results extend prior research suggesting habituation of certain sensory responses is reduced in autism; however, they also suggest that habituation differences observed using this study's paradigm might not be a primary driver of autistic participants' real-world sound intolerance. En ligne : https://doi.org/10.1002/aur.3022 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=513

Hyper-focus, sticky attention, and springy attention in young autistic children: Associations with sensory behaviors and cognitive ability / Andre SILLAS ; Melanie PRIETO ; Emily CAMP ; Christine Wu NORDAHL ; Susan M. RIVERA in Autism Research, 17-8 (August 2024)  

Public ISBD [article]  inAutism Research > 17-8 (August 2024) . - p.1677-1695 Titre : Hyper-focus, sticky attention, and springy attention in young autistic children: Associations with sensory behaviors and cognitive ability Type de document : Texte imprimé et/ou numérique Auteurs : Andre SILLAS, Auteur ; Melanie PRIETO, Auteur ; Emily CAMP, Auteur ; Christine Wu NORDAHL, Auteur ; Susan M. RIVERA, Auteur Article en page(s) : p.1677-1695 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Abstract The autistic-developed monotropism account suggests that atypical, domain-general attentional hyper-focus on interests is a central aspect of autism, but domain-general attention differences in autism can manifest differently. Prior research suggests autistic children are often slow to disengage attention from stimuli-a pattern often called "sticky attention"-and that they can show reduced novelty preference. These attentional patterns could influence sensory experiences and learning. We used eye-tracking to investigate novelty preference and "sticky attention" in young autistic children; we also examined whether attentional patterns were related to cognitive abilities and caregiver-reported sensory responsiveness. A total of 46 autistic and 28 nonautistic participants, aged between 2 and 4?years, provided usable data. We found no evidence that autistic children exhibited greater "sticky attention" than nonautistics, but "sticky attention" in autism was associated with more caregiver-reported sensory hyper-responsiveness, seeking/interests, and enhanced perception. Autistic children also nonsignificantly trended toward exhibiting reduced novelty preference. Unexpectedly, the time-course of this trending novelty preference difference implied it was not driven by reduced orienting to novelty, but increased returning to already-familiarized stimuli: what we call "springy attention." Exploratory analyses of data from the attentional disengagement task suggest autistic participants may have exhibited greater "springy attention," though further research with paradigms optimized for measuring this construct should confirm this. Importantly, "springy attention" was robustly related to reduced cognitive abilities and greater caregiver-reported hypo-responsiveness. Thus, this study illuminates two distinct domain-general attentional patterns, each with distinct correlates in young autistic children, which could have important implications for understanding autistic children's learning, development, and experiences. En ligne : https://doi.org/10.1002/aur.3174 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=533 [article] Hyper-focus, sticky attention, and springy attention in young autistic children: Associations with sensory behaviors and cognitive ability [Texte imprimé et/ou numérique] / Andre SILLAS, Auteur ; Melanie PRIETO, Auteur ; Emily CAMP, Auteur ; Christine Wu NORDAHL, Auteur ; Susan M. RIVERA, Auteur . - p.1677-1695. Langues : Anglais (eng) in Autism Research > 17-8 (August 2024) . - p.1677-1695 Index. décimale : PER Périodiques Résumé : Abstract The autistic-developed monotropism account suggests that atypical, domain-general attentional hyper-focus on interests is a central aspect of autism, but domain-general attention differences in autism can manifest differently. Prior research suggests autistic children are often slow to disengage attention from stimuli-a pattern often called "sticky attention"-and that they can show reduced novelty preference. These attentional patterns could influence sensory experiences and learning. We used eye-tracking to investigate novelty preference and "sticky attention" in young autistic children; we also examined whether attentional patterns were related to cognitive abilities and caregiver-reported sensory responsiveness. A total of 46 autistic and 28 nonautistic participants, aged between 2 and 4?years, provided usable data. We found no evidence that autistic children exhibited greater "sticky attention" than nonautistics, but "sticky attention" in autism was associated with more caregiver-reported sensory hyper-responsiveness, seeking/interests, and enhanced perception. Autistic children also nonsignificantly trended toward exhibiting reduced novelty preference. Unexpectedly, the time-course of this trending novelty preference difference implied it was not driven by reduced orienting to novelty, but increased returning to already-familiarized stimuli: what we call "springy attention." Exploratory analyses of data from the attentional disengagement task suggest autistic participants may have exhibited greater "springy attention," though further research with paradigms optimized for measuring this construct should confirm this. Importantly, "springy attention" was robustly related to reduced cognitive abilities and greater caregiver-reported hypo-responsiveness. Thus, this study illuminates two distinct domain-general attentional patterns, each with distinct correlates in young autistic children, which could have important implications for understanding autistic children's learning, development, and experiences. En ligne : https://doi.org/10.1002/aur.3174 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=533

Identification of Longitudinal Sensory Subtypes in Typical Development and Autism Spectrum Development Using Growth Mixture Modelling / Patrick DWYER in Research in Autism Spectrum Disorders, 78 (October 2020)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 78 (October 2020) . - 101645 Titre : Identification of Longitudinal Sensory Subtypes in Typical Development and Autism Spectrum Development Using Growth Mixture Modelling Type de document : Texte imprimé et/ou numérique Auteurs : Patrick DWYER, Auteur ; Clifford D. SARON, Auteur ; Susan M. RIVERA, Auteur Article en page(s) : 101645 Langues : Anglais (eng) Mots-clés : Autism  sensory processing  heterogeneity  subgroups  growth mixture model  subtypes Index. décimale : PER Périodiques Résumé : Background Prior longitudinal investigations of trajectories of sensory features in Autism Spectrum Development (ASD) have not explored heterogeneity. The present study explores initial levels and trajectories of sensory features in ASD as well as, for comparison, typical development. Method Growth mixture modelling was used to explore classes of autistic and typically-developing participants based on caregiver-reported total sensory behaviours on the Short Sensory Profile (SSP) at two time points, when children were aged 2-5 and 4-10 years of age, respectively. Results Three classes are described: a mixed class of autistic and typically-developing participants with few problematic sensory behaviours (“Stable Mild”), a mostly-autistic class with more problematic sensory features (“Stable Intense”), and a small class of autistic participants whose sensory features reportedly worsened (“Increasingly Intense”). Autistic participants in the Stable Intense class exhibited high anxiety, while autistic participants in the Increasingly Intense class appeared to obtain high scores on cognitive assessments. Conclusions The heterogeneity of sensory features and challenges found in the present study may suggest that practitioners should conduct individualized assessments of sensory features in ASD. Furthermore, practitioners should be aware of links between sensory features and anxiety in ASD, which may imply that sensory accommodations and supports could protect against anxiety. Finally, the worsening of sensory features over time in the Increasingly Intense subgroup may indicate a need for continued monitoring of changes in sensory features, perhaps especially as sensory environments change during periods of transition. En ligne : https://doi.org/10.1016/j.rasd.2020.101645 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=433 [article] Identification of Longitudinal Sensory Subtypes in Typical Development and Autism Spectrum Development Using Growth Mixture Modelling [Texte imprimé et/ou numérique] / Patrick DWYER, Auteur ; Clifford D. SARON, Auteur ; Susan M. RIVERA, Auteur . - 101645. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 78 (October 2020) . - 101645 Mots-clés : Autism  sensory processing  heterogeneity  subgroups  growth mixture model  subtypes Index. décimale : PER Périodiques Résumé : Background Prior longitudinal investigations of trajectories of sensory features in Autism Spectrum Development (ASD) have not explored heterogeneity. The present study explores initial levels and trajectories of sensory features in ASD as well as, for comparison, typical development. Method Growth mixture modelling was used to explore classes of autistic and typically-developing participants based on caregiver-reported total sensory behaviours on the Short Sensory Profile (SSP) at two time points, when children were aged 2-5 and 4-10 years of age, respectively. Results Three classes are described: a mixed class of autistic and typically-developing participants with few problematic sensory behaviours (“Stable Mild”), a mostly-autistic class with more problematic sensory features (“Stable Intense”), and a small class of autistic participants whose sensory features reportedly worsened (“Increasingly Intense”). Autistic participants in the Stable Intense class exhibited high anxiety, while autistic participants in the Increasingly Intense class appeared to obtain high scores on cognitive assessments. Conclusions The heterogeneity of sensory features and challenges found in the present study may suggest that practitioners should conduct individualized assessments of sensory features in ASD. Furthermore, practitioners should be aware of links between sensory features and anxiety in ASD, which may imply that sensory accommodations and supports could protect against anxiety. Finally, the worsening of sensory features over time in the Increasingly Intense subgroup may indicate a need for continued monitoring of changes in sensory features, perhaps especially as sensory environments change during periods of transition. En ligne : https://doi.org/10.1016/j.rasd.2020.101645 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=433

Motor Control Adherence to the Two-thirds Power Law Differs in Autistic Development / Emily FOURIE in Journal of Autism and Developmental Disorders, 55-3 (March 2025)  

Permalink

?Neural Noise? in Auditory Responses in Young Autistic and Neurotypical Children / Svjetlana VUKUSIC ; Zachary J. WILLIAMS ; Clifford D. SARON ; Susan M. RIVERA in Journal of Autism and Developmental Disorders, 54-2 (February 2024)  

Permalink

Sertraline May Improve Language Developmental Trajectory in Young Children with Fragile X Syndrome: A Retrospective Chart Review / Tri Indah WINARNI in Autism Research and Treatment, (March 2012)  

Permalink

The Action Observation System when Observing Hand Actions in Autism and Typical Development / Jennifer J. POKORNY in Autism Research, 8-3 (June 2015)  

Permalink

---

1 (1 - 9 / 9)