Facilitating sensorimotor integration via blocked practice underpins imitation learning of atypical biological kinematics in autism spectrum disorder / Nathan C. FOSTER in Autism, 24-6 (August 2020)  

Public ISBD [article]  inAutism > 24-6 (August 2020) . - p.1494-1505 Titre : Facilitating sensorimotor integration via blocked practice underpins imitation learning of atypical biological kinematics in autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : Nathan C. FOSTER, Auteur ; Simon J. BENNETT, Auteur ; Joe CAUSER, Auteur ; Digby ELLIOTT, Auteur ; Geoffrey BIRD, Auteur ; Spencer J. HAYES, Auteur Article en page(s) : p.1494-1505 Langues : Anglais (eng) Mots-clés : autism spectrum disorder  biological motion kinematics  blocked practice  imitation  sensorimotor integration Index. décimale : PER Périodiques Résumé : Autistic people sometimes find it difficult to copy another person's movement accurately, especially if the movement is unfamiliar or novel (e.g. to use chop sticks). In this study, we found that autistic people were generally less accurate at copying a novel movement than non-autistic people. However, by making a small adjustment and asking people to copy this movement for a set number of attempts in a predictable manner, we showed that autistic people did successfully learn to copy a new movement. This is a very important finding for autistic people because rather than thinking they cannot copy new movements, all that needs to be considered is for parents/guardians, teachers and/or support workers to make a small adjustment so that learning occurs in a predictable manner for new skills to be successfully acquired through copying. The implications from this study are wide-ranging as copying (imitation) and motor learning are important developmental processes for autistic infants and children to acquire in order to interact within the world. Therefore, practising these behaviours in the most effective way can certainly help the developmental pathway. En ligne : http://dx.doi.org/10.1177/1362361320908104 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=428 [article] Facilitating sensorimotor integration via blocked practice underpins imitation learning of atypical biological kinematics in autism spectrum disorder [Texte imprimé et/ou numérique] / Nathan C. FOSTER, Auteur ; Simon J. BENNETT, Auteur ; Joe CAUSER, Auteur ; Digby ELLIOTT, Auteur ; Geoffrey BIRD, Auteur ; Spencer J. HAYES, Auteur . - p.1494-1505. Langues : Anglais (eng) in Autism > 24-6 (August 2020) . - p.1494-1505 Mots-clés : autism spectrum disorder  biological motion kinematics  blocked practice  imitation  sensorimotor integration Index. décimale : PER Périodiques Résumé : Autistic people sometimes find it difficult to copy another person's movement accurately, especially if the movement is unfamiliar or novel (e.g. to use chop sticks). In this study, we found that autistic people were generally less accurate at copying a novel movement than non-autistic people. However, by making a small adjustment and asking people to copy this movement for a set number of attempts in a predictable manner, we showed that autistic people did successfully learn to copy a new movement. This is a very important finding for autistic people because rather than thinking they cannot copy new movements, all that needs to be considered is for parents/guardians, teachers and/or support workers to make a small adjustment so that learning occurs in a predictable manner for new skills to be successfully acquired through copying. The implications from this study are wide-ranging as copying (imitation) and motor learning are important developmental processes for autistic infants and children to acquire in order to interact within the world. Therefore, practising these behaviours in the most effective way can certainly help the developmental pathway. En ligne : http://dx.doi.org/10.1177/1362361320908104 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=428

Getting Off to a Shaky Start: Specificity in Planning and Feedforward Control During Sensorimotor Learning in Autism Spectrum Disorder / Nathan C. FOSTER in Autism Research, 13-3 (March 2020)  

Public ISBD [article]  inAutism Research > 13-3 (March 2020) . - p.423-435 Titre : Getting Off to a Shaky Start: Specificity in Planning and Feedforward Control During Sensorimotor Learning in Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : Nathan C. FOSTER, Auteur ; Simon J. BENNETT, Auteur ; Joe CAUSER, Auteur ; Digby ELLIOTT, Auteur ; Geoffrey BIRD, Auteur ; Spencer J. HAYES, Auteur Article en page(s) : p.423-435 Langues : Anglais (eng) Mots-clés : autism  feedforward and feedback motor control  sensorimotor learning Index. décimale : PER Périodiques Résumé : Whilst autistic individuals develop new internal action models during sensorimotor learning, the acquired movements are executed less accurately and with greater variability. Such movement profiles are related to differences in sensorimotor integration and/or altered feedforward/feedback sensorimotor control. We investigated the processes underlying sensorimotor learning in autism by quantifying accuracy and variability, relative timing, and feedforward and feedback control. Although autistic individuals demonstrated significant sensorimotor learning across trials, which was facilitated by processing knowledge-of-results feedback, motor execution was less accurate than non-autistic individuals. Kinematic analysis indicated that autistic individuals showed significantly greater spatial variability at peak acceleration, but comparable spatial variability at peak velocity. These kinematic markers suggest that autistic movement profiles are driven by specific differences in sensorimotor control processes (i.e., internal action models) associated with planning and regulating the forces required to execute the movement. The reduction of variability at peak velocity indicates intact early feedback-based sensorimotor control in autism. Understanding how feedforward and feedback-based control processes operate provides an opportunity to explore how these control processes influence the acquisition of socio-motor actions in autism. Autism Res 2020, 13: 423-435. (c) 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Autistic adults successfully learned a new movement skill by physically practising it, and using feedback about how well they had done to become more accurate. When looking at the movements in detail, autistic adults were more variable than non-autistic adults when planning (e.g., how much force to use), and performing, the movement. These differences impact how autistic individuals learn different types of movement skills, which might influence how other behaviours (e.g., imitation) are acquired that support social interaction. En ligne : http://dx.doi.org/10.1002/aur.2214 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=421 [article] Getting Off to a Shaky Start: Specificity in Planning and Feedforward Control During Sensorimotor Learning in Autism Spectrum Disorder [Texte imprimé et/ou numérique] / Nathan C. FOSTER, Auteur ; Simon J. BENNETT, Auteur ; Joe CAUSER, Auteur ; Digby ELLIOTT, Auteur ; Geoffrey BIRD, Auteur ; Spencer J. HAYES, Auteur . - p.423-435. Langues : Anglais (eng) in Autism Research > 13-3 (March 2020) . - p.423-435 Mots-clés : autism  feedforward and feedback motor control  sensorimotor learning Index. décimale : PER Périodiques Résumé : Whilst autistic individuals develop new internal action models during sensorimotor learning, the acquired movements are executed less accurately and with greater variability. Such movement profiles are related to differences in sensorimotor integration and/or altered feedforward/feedback sensorimotor control. We investigated the processes underlying sensorimotor learning in autism by quantifying accuracy and variability, relative timing, and feedforward and feedback control. Although autistic individuals demonstrated significant sensorimotor learning across trials, which was facilitated by processing knowledge-of-results feedback, motor execution was less accurate than non-autistic individuals. Kinematic analysis indicated that autistic individuals showed significantly greater spatial variability at peak acceleration, but comparable spatial variability at peak velocity. These kinematic markers suggest that autistic movement profiles are driven by specific differences in sensorimotor control processes (i.e., internal action models) associated with planning and regulating the forces required to execute the movement. The reduction of variability at peak velocity indicates intact early feedback-based sensorimotor control in autism. Understanding how feedforward and feedback-based control processes operate provides an opportunity to explore how these control processes influence the acquisition of socio-motor actions in autism. Autism Res 2020, 13: 423-435. (c) 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Autistic adults successfully learned a new movement skill by physically practising it, and using feedback about how well they had done to become more accurate. When looking at the movements in detail, autistic adults were more variable than non-autistic adults when planning (e.g., how much force to use), and performing, the movement. These differences impact how autistic individuals learn different types of movement skills, which might influence how other behaviours (e.g., imitation) are acquired that support social interaction. En ligne : http://dx.doi.org/10.1002/aur.2214 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=421

How do Individuals with Autism Plan Their Movements? / Cheryl M. GLAZEBROOK in Journal of Autism and Developmental Disorders, 38-1 (January 2008)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 38-1 (January 2008) . - p.114-126 Titre : How do Individuals with Autism Plan Their Movements? Type de document : Texte imprimé et/ou numérique Auteurs : Cheryl M. GLAZEBROOK, Auteur ; Peter SZATMARI, Auteur ; Digby ELLIOTT, Auteur Année de publication : 2008 Article en page(s) : p.114-126 Langues : Anglais (eng) Mots-clés : Motor-control Movement Planning Index. décimale : PER Périodiques Résumé : Two experiments investigated how persons with and without autism plan manual aiming movements when advance information is direct and when strategic planning is required. In Experiment 1 advance information about hand, direction, and/or movement amplitude was manipulated. Reaction times suggested both groups adopted a hierarchical pattern of movement planning. In Experiment 2, participants performed aiming movements to one of two targets that were the same or different size. Participants without autism varied the starting location in anticipation of specific target stimuli whereas participants with autism consistently selected the midpoint. Overall, individuals with autism used advance information to plan their movements when this information was direct. However, their performance became stereotyped when strategies were self-generated. En ligne : http://dx.doi.org/10.1007/s10803-007-0369-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=316 [article] How do Individuals with Autism Plan Their Movements? [Texte imprimé et/ou numérique] / Cheryl M. GLAZEBROOK, Auteur ; Peter SZATMARI, Auteur ; Digby ELLIOTT, Auteur . - 2008 . - p.114-126. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 38-1 (January 2008) . - p.114-126 Mots-clés : Motor-control Movement Planning Index. décimale : PER Périodiques Résumé : Two experiments investigated how persons with and without autism plan manual aiming movements when advance information is direct and when strategic planning is required. In Experiment 1 advance information about hand, direction, and/or movement amplitude was manipulated. Reaction times suggested both groups adopted a hierarchical pattern of movement planning. In Experiment 2, participants performed aiming movements to one of two targets that were the same or different size. Participants without autism varied the starting location in anticipation of specific target stimuli whereas participants with autism consistently selected the midpoint. Overall, individuals with autism used advance information to plan their movements when this information was direct. However, their performance became stereotyped when strategies were self-generated. En ligne : http://dx.doi.org/10.1007/s10803-007-0369-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=316

Low Fidelity Imitation of Atypical Biological Kinematics in Autism Spectrum Disorders Is Modulated by Self-Generated Selective Attention / Spencer J. HAYES in Journal of Autism and Developmental Disorders, 46-2 (February 2016)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 46-2 (February 2016) . - p.502-513 Titre : Low Fidelity Imitation of Atypical Biological Kinematics in Autism Spectrum Disorders Is Modulated by Self-Generated Selective Attention Type de document : Texte imprimé et/ou numérique Auteurs : Spencer J. HAYES, Auteur ; Matthew ANDREW, Auteur ; Digby ELLIOTT, Auteur ; Emma GOWEN, Auteur ; Simon J. BENNETT, Auteur Année de publication : 2016 Article en page(s) : p.502-513 Langues : Anglais (eng) Mots-clés : Autism spectrum disorders  Imitation  Biological motion kinematics  Attention Index. décimale : PER Périodiques Résumé : We examined whether adults with autism had difficulty imitating atypical biological kinematics. To reduce the impact that higher-order processes have on imitation we used a non-human agent model to control social attention, and removed end-state target goals in half of the trials to minimise goal-directed attention. Findings showed that only neurotypical adults imitated atypical biological kinematics. Adults with autism did, however, become significantly more accurate at imitating movement time. This confirmed they engaged in the task, and that sensorimotor adaptation was self-regulated. The attentional bias to movement time suggests the attenuation in imitating kinematics might be a compensatory strategy due to deficits in lower-level visuomotor processes associated with self-other mapping, or selective attention modulated the processes that represent biological kinematics. En ligne : http://dx.doi.org/10.1007/s10803-015-2588-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=280 [article] Low Fidelity Imitation of Atypical Biological Kinematics in Autism Spectrum Disorders Is Modulated by Self-Generated Selective Attention [Texte imprimé et/ou numérique] / Spencer J. HAYES, Auteur ; Matthew ANDREW, Auteur ; Digby ELLIOTT, Auteur ; Emma GOWEN, Auteur ; Simon J. BENNETT, Auteur . - 2016 . - p.502-513. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 46-2 (February 2016) . - p.502-513 Mots-clés : Autism spectrum disorders  Imitation  Biological motion kinematics  Attention Index. décimale : PER Périodiques Résumé : We examined whether adults with autism had difficulty imitating atypical biological kinematics. To reduce the impact that higher-order processes have on imitation we used a non-human agent model to control social attention, and removed end-state target goals in half of the trials to minimise goal-directed attention. Findings showed that only neurotypical adults imitated atypical biological kinematics. Adults with autism did, however, become significantly more accurate at imitating movement time. This confirmed they engaged in the task, and that sensorimotor adaptation was self-regulated. The attentional bias to movement time suggests the attenuation in imitating kinematics might be a compensatory strategy due to deficits in lower-level visuomotor processes associated with self-other mapping, or selective attention modulated the processes that represent biological kinematics. En ligne : http://dx.doi.org/10.1007/s10803-015-2588-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=280

Movement Planning and Reprogramming in Individuals With Autism / Natasha NAZARALI in Journal of Autism and Developmental Disorders, 39-10 (October 2009)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 39-10 (October 2009) . - p.1401-1411 Titre : Movement Planning and Reprogramming in Individuals With Autism Type de document : Texte imprimé et/ou numérique Auteurs : Natasha NAZARALI, Auteur ; Cheryl M. GLAZEBROOK, Auteur ; Digby ELLIOTT, Auteur Année de publication : 2009 Article en page(s) : p.1401-1411 Langues : Anglais (eng) Mots-clés : Aiming Manual Motor Reaching Index. décimale : PER Périodiques Résumé : Two experiments explored how individuals with and without autism plan and reprogram movements. Participants were given partial or complete information regarding the location of the upcoming manual movement. In Experiment 1, direct information specified the hand or direction of the upcoming movement. These results replicated previous reports that participants with autism utilize advance information to prepare their movements in the same manner as their chronologically age matched peers. Experiment 2 examined how individuals respond to an unexpected change in the movement requirements. Participants received advance information about the hand and direction of the upcoming movement. On 20% of the trials participants needed to adjust either the hand or direction they had prepared. Overall, the individuals with autism had difficulty reprogramming already planned movements, particularly if a different effector was required. En ligne : http://dx.doi.org/10.1007/s10803-009-0756-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=839 [article] Movement Planning and Reprogramming in Individuals With Autism [Texte imprimé et/ou numérique] / Natasha NAZARALI, Auteur ; Cheryl M. GLAZEBROOK, Auteur ; Digby ELLIOTT, Auteur . - 2009 . - p.1401-1411. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 39-10 (October 2009) . - p.1401-1411 Mots-clés : Aiming Manual Motor Reaching Index. décimale : PER Périodiques Résumé : Two experiments explored how individuals with and without autism plan and reprogram movements. Participants were given partial or complete information regarding the location of the upcoming manual movement. In Experiment 1, direct information specified the hand or direction of the upcoming movement. These results replicated previous reports that participants with autism utilize advance information to prepare their movements in the same manner as their chronologically age matched peers. Experiment 2 examined how individuals respond to an unexpected change in the movement requirements. Participants received advance information about the hand and direction of the upcoming movement. On 20% of the trials participants needed to adjust either the hand or direction they had prepared. Overall, the individuals with autism had difficulty reprogramming already planned movements, particularly if a different effector was required. En ligne : http://dx.doi.org/10.1007/s10803-009-0756-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=839

Sensorimotor learning and associated visual perception are intact but unrelated in autism spectrum disorder / Spencer J. HAYES in Autism Research, 11-2 (February 2018)  

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The role of vision for online control of manual aiming movements in persons with autism spectrum disorders / Cheryl M. GLAZEBROOK in Autism, 13-4 (July 2009)  

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