3 recherche sur le mot-clé 'dynamical systems'

Autonomic complexity and emotion (dys-)regulation in early childhood across high- and low-risk contexts / Daniel BERRY in Development and Psychopathology, 31-3 (August 2019)  

Public ISBD [article]  inDevelopment and Psychopathology > 31-3 (August 2019) . - p.1173-1190 Titre : Autonomic complexity and emotion (dys-)regulation in early childhood across high- and low-risk contexts Type de document : Texte imprimé et/ou numérique Auteurs : Daniel BERRY, Auteur ; Alyssa R. PALMER, Auteur ; Rebecca DISTEFANO, Auteur ; Ann S. MASTEN, Auteur Article en page(s) : p.1173-1190 Langues : Anglais (eng) Mots-clés : autonomic nervous system  dynamical systems  emotion regulation  entropy  fractal  respiratory sinus arrhythmia Index. décimale : PER Périodiques Résumé : Developing the ability to regulate one's emotions in accordance with contextual demands (i.e., emotion regulation) is a central developmental task of early childhood. These processes are supported by the engagement of the autonomic nervous system (ANS), a physiological hub of a vast network tasked with dynamically integrating real-time experiential inputs with internal motivational and goal states. To date, much of what is known about the ANS and emotion regulation has been based on measures of respiratory sinus arrhythmia, a cardiac indicator of parasympathetic activity. In the present study, we draw from dynamical systems models to introduce two nonlinear indices of cardiac complexity (fractality and sample entropy) as potential indicators of these broader ANS dynamics. Using data from a stratified sample of preschoolers living in high- (i.e., emergency homeless shelter) and low-risk contexts (N = 115), we show that, in conjunction with respiratory sinus arrhythmia, these nonlinear indices may help to clarify important differences in the behavioral manifestations of emotion regulation. In particular, our results suggest that cardiac complexity may be especially useful for discerning active, effortful emotion regulation from less effortful regulation and dysregulation. En ligne : http://dx.doi.org/10.1017/S0954579419000683 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=403 [article] Autonomic complexity and emotion (dys-)regulation in early childhood across high- and low-risk contexts [Texte imprimé et/ou numérique] / Daniel BERRY, Auteur ; Alyssa R. PALMER, Auteur ; Rebecca DISTEFANO, Auteur ; Ann S. MASTEN, Auteur . - p.1173-1190. Langues : Anglais (eng) in Development and Psychopathology > 31-3 (August 2019) . - p.1173-1190 Mots-clés : autonomic nervous system  dynamical systems  emotion regulation  entropy  fractal  respiratory sinus arrhythmia Index. décimale : PER Périodiques Résumé : Developing the ability to regulate one's emotions in accordance with contextual demands (i.e., emotion regulation) is a central developmental task of early childhood. These processes are supported by the engagement of the autonomic nervous system (ANS), a physiological hub of a vast network tasked with dynamically integrating real-time experiential inputs with internal motivational and goal states. To date, much of what is known about the ANS and emotion regulation has been based on measures of respiratory sinus arrhythmia, a cardiac indicator of parasympathetic activity. In the present study, we draw from dynamical systems models to introduce two nonlinear indices of cardiac complexity (fractality and sample entropy) as potential indicators of these broader ANS dynamics. Using data from a stratified sample of preschoolers living in high- (i.e., emergency homeless shelter) and low-risk contexts (N = 115), we show that, in conjunction with respiratory sinus arrhythmia, these nonlinear indices may help to clarify important differences in the behavioral manifestations of emotion regulation. In particular, our results suggest that cardiac complexity may be especially useful for discerning active, effortful emotion regulation from less effortful regulation and dysregulation. En ligne : http://dx.doi.org/10.1017/S0954579419000683 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=403

Conceptualization of a Heuristic to Predict Increase in Restricted and Repetitive Behaviour in ASD across the Short to Medium Term / Andrew CASHIN in Autism - Open Access, 7-1 ([01/01/2017])  

Public ISBD [article]  inAutism - Open Access > 7-1 [01/01/2017] . - 6 p. Titre : Conceptualization of a Heuristic to Predict Increase in Restricted and Repetitive Behaviour in ASD across the Short to Medium Term Type de document : Texte imprimé et/ou numérique Auteurs : Andrew CASHIN, Auteur ; James YORKE, Auteur Article en page(s) : 6 p. Langues : Anglais (eng) Mots-clés : Autism  ASD  Dynamical systems  Restricted and repetitive behaviors  Heuristic Index. décimale : PER Périodiques Résumé : Restricted and repetitive behaviors (RRBs) are central to the diagnosis of Autism Spectrum Disorder (ASD), yet there is a paucity of research in this domain. Despite the lack of conceptual clarity, and related empirical findings to underpin practice, clinicians are called on to not only diagnose people with ASD, but also to make prognostic predictions across the short to medium term. These prognostic decisions impact the interventions selected and access to programs. This paper synthesizes available evidence to inform a model of repetitive patterns of thought, ritualistic behaviors and insistence on sameness, arguably the cluster of behavior most likely to be seen in mainstream clinical settings and schools and design a heuristic that could be applied by clinicians to aid prognostic decisions and form the basis of further research eventually leading to actuarial models. En ligne : https://dx.doi.org/10.4172/2165-7890.1000200 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=410 [article] Conceptualization of a Heuristic to Predict Increase in Restricted and Repetitive Behaviour in ASD across the Short to Medium Term [Texte imprimé et/ou numérique] / Andrew CASHIN, Auteur ; James YORKE, Auteur . - 6 p. Langues : Anglais (eng) in Autism - Open Access > 7-1 [01/01/2017] . - 6 p. Mots-clés : Autism  ASD  Dynamical systems  Restricted and repetitive behaviors  Heuristic Index. décimale : PER Périodiques Résumé : Restricted and repetitive behaviors (RRBs) are central to the diagnosis of Autism Spectrum Disorder (ASD), yet there is a paucity of research in this domain. Despite the lack of conceptual clarity, and related empirical findings to underpin practice, clinicians are called on to not only diagnose people with ASD, but also to make prognostic predictions across the short to medium term. These prognostic decisions impact the interventions selected and access to programs. This paper synthesizes available evidence to inform a model of repetitive patterns of thought, ritualistic behaviors and insistence on sameness, arguably the cluster of behavior most likely to be seen in mainstream clinical settings and schools and design a heuristic that could be applied by clinicians to aid prognostic decisions and form the basis of further research eventually leading to actuarial models. En ligne : https://dx.doi.org/10.4172/2165-7890.1000200 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=410

Simulated nonlinear genetic and environmental dynamics of complex traits / Michael D. HUNTER in Development and Psychopathology, 35-2 (May 2023)  

Public ISBD [article]  inDevelopment and Psychopathology > 35-2 (May 2023) . - p.662-677 Titre : Simulated nonlinear genetic and environmental dynamics of complex traits Type de document : Texte imprimé et/ou numérique Auteurs : Michael D. HUNTER, Auteur ; Kevin L. MCKEE, Auteur ; Eric TURKHEIMER, Auteur Article en page(s) : p.662-677 Langues : Anglais (eng) Mots-clés : behavior genetics  dynamical systems  GWAS  heritability  simulation Index. décimale : PER Périodiques Résumé : Genetic studies of complex traits often show disparities in estimated heritability depending on the method used, whether by genomic associations or twin and family studies. We present a simulation of individual genomes with dynamic environmental conditions to consider how linear and nonlinear effects, gene-by-environment interactions, and gene-by-environment correlations may work together to govern the long-term development of complex traits and affect estimates of heritability from common methods. Our simulation studies demonstrate that the genetic effects estimated by genome wide association studies in unrelated individuals are inadequate to characterize gene-by-environment interaction, while including related individuals in genome-wide complex trait analysis (GCTA) allows gene-by-environment interactions to be recovered in the heritability. These theoretical findings provide an explanation for the ''missing heritability'' problem and bridge the conceptual gap between the most common findings of GCTA and twin studies. Future studies may use the simulation model to test hypotheses about phenotypic complexity either in an exploratory way or by replicating well-established observations of specific phenotypes. En ligne : http://dx.doi.org/10.1017/S0954579421001796 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=504 [article] Simulated nonlinear genetic and environmental dynamics of complex traits [Texte imprimé et/ou numérique] / Michael D. HUNTER, Auteur ; Kevin L. MCKEE, Auteur ; Eric TURKHEIMER, Auteur . - p.662-677. Langues : Anglais (eng) in Development and Psychopathology > 35-2 (May 2023) . - p.662-677 Mots-clés : behavior genetics  dynamical systems  GWAS  heritability  simulation Index. décimale : PER Périodiques Résumé : Genetic studies of complex traits often show disparities in estimated heritability depending on the method used, whether by genomic associations or twin and family studies. We present a simulation of individual genomes with dynamic environmental conditions to consider how linear and nonlinear effects, gene-by-environment interactions, and gene-by-environment correlations may work together to govern the long-term development of complex traits and affect estimates of heritability from common methods. Our simulation studies demonstrate that the genetic effects estimated by genome wide association studies in unrelated individuals are inadequate to characterize gene-by-environment interaction, while including related individuals in genome-wide complex trait analysis (GCTA) allows gene-by-environment interactions to be recovered in the heritability. These theoretical findings provide an explanation for the ''missing heritability'' problem and bridge the conceptual gap between the most common findings of GCTA and twin studies. Future studies may use the simulation model to test hypotheses about phenotypic complexity either in an exploratory way or by replicating well-established observations of specific phenotypes. En ligne : http://dx.doi.org/10.1017/S0954579421001796 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=504