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Brief Report: Classification of Autistic Traits According to Brain Activity Recoded by fNIRS Using ?-Complexity Coefficients / A. DAHAN in Journal of Autism and Developmental Disorders, 51-9 (September 2021)
[article]
Titre : Brief Report: Classification of Autistic Traits According to Brain Activity Recoded by fNIRS Using ?-Complexity Coefficients Type de document : Texte imprimé et/ou numérique Auteurs : A. DAHAN, Auteur ; Y. A. DUBNOV, Auteur ; A. Y. POPKOV, Auteur ; I. GUTMAN, Auteur ; H. G. PROBOLOVSKI, Auteur Article en page(s) : p.3380-3390 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder/diagnosis Autistic Disorder Brain/diagnostic imaging Brain Mapping Humans Autistic traits Classification Complexity Interpersonal synchronization fNIRS Index. décimale : PER Périodiques Résumé : Individuals with ASD have been shown to have different pattern of functional connectivity. In this study, brain activity of participants with many and few autistic traits, was recorded using an fNIRS device, as participants preformed an interpersonal synchronization task. This type of task involves synchronization and functional connectivity of different brain regions. A novel method for assessing signal complexity, using ?-complexity coefficients, applied for the first i.e. on fNIRS recording, was used to classify brain recording of participants with many/few autistic traits. Successful classification was achieved implying that this method may be useful for classification of fNIRS recordings and that there is a difference in brain activity between participants with low and high autistic traits as they perform an interpersonal synchronization task. En ligne : http://dx.doi.org/10.1007/s10803-020-04793-w Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453
in Journal of Autism and Developmental Disorders > 51-9 (September 2021) . - p.3380-3390[article] Brief Report: Classification of Autistic Traits According to Brain Activity Recoded by fNIRS Using ?-Complexity Coefficients [Texte imprimé et/ou numérique] / A. DAHAN, Auteur ; Y. A. DUBNOV, Auteur ; A. Y. POPKOV, Auteur ; I. GUTMAN, Auteur ; H. G. PROBOLOVSKI, Auteur . - p.3380-3390.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 51-9 (September 2021) . - p.3380-3390
Mots-clés : Autism Spectrum Disorder/diagnosis Autistic Disorder Brain/diagnostic imaging Brain Mapping Humans Autistic traits Classification Complexity Interpersonal synchronization fNIRS Index. décimale : PER Périodiques Résumé : Individuals with ASD have been shown to have different pattern of functional connectivity. In this study, brain activity of participants with many and few autistic traits, was recorded using an fNIRS device, as participants preformed an interpersonal synchronization task. This type of task involves synchronization and functional connectivity of different brain regions. A novel method for assessing signal complexity, using ?-complexity coefficients, applied for the first i.e. on fNIRS recording, was used to classify brain recording of participants with many/few autistic traits. Successful classification was achieved implying that this method may be useful for classification of fNIRS recordings and that there is a difference in brain activity between participants with low and high autistic traits as they perform an interpersonal synchronization task. En ligne : http://dx.doi.org/10.1007/s10803-020-04793-w Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453 Brief Report: Effect of Spatial Complexity on Visual Short-Term Memory and Self-Reported Autistic-Like Traits in Typically Developed Individuals / Junichi TAKAHASHI in Journal of Autism and Developmental Disorders, 43-7 (July 2013)
[article]
Titre : Brief Report: Effect of Spatial Complexity on Visual Short-Term Memory and Self-Reported Autistic-Like Traits in Typically Developed Individuals Type de document : Texte imprimé et/ou numérique Auteurs : Junichi TAKAHASHI, Auteur ; Jiro GYOBA, Auteur ; Nozomi YAMAWAKI, Auteur Année de publication : 2013 Article en page(s) : p.1725-1731 Langues : Anglais (eng) Mots-clés : Autism Autism spectrum quotient Visual short-term memory Complexity Spatial configuration Index. décimale : PER Périodiques Résumé : This report examines effects of the spatial complexity of configurations on visual short-term memory (VSTM) capacity for individuals from the general population differing on autism-spectrum quotient (AQ) scores. During each trial, nine-line segments with various orientations were arrayed in simple or complex configurations and presented in both memory and test displays. Typically, VSTM capacity decreases with increasing configuration complexity. We found that VSTM capacity for simple configurations was larger than for complex configurations in individuals reporting low AQ, whereas for individuals reporting high AQ, there were no significant differences between these configurations. These results suggest that the effects of spatial complexity on VSTM capacity could be observed in individuals reporting low AQ, but not in individuals reporting high AQ. En ligne : http://dx.doi.org/10.1007/s10803-012-1711-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202
in Journal of Autism and Developmental Disorders > 43-7 (July 2013) . - p.1725-1731[article] Brief Report: Effect of Spatial Complexity on Visual Short-Term Memory and Self-Reported Autistic-Like Traits in Typically Developed Individuals [Texte imprimé et/ou numérique] / Junichi TAKAHASHI, Auteur ; Jiro GYOBA, Auteur ; Nozomi YAMAWAKI, Auteur . - 2013 . - p.1725-1731.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 43-7 (July 2013) . - p.1725-1731
Mots-clés : Autism Autism spectrum quotient Visual short-term memory Complexity Spatial configuration Index. décimale : PER Périodiques Résumé : This report examines effects of the spatial complexity of configurations on visual short-term memory (VSTM) capacity for individuals from the general population differing on autism-spectrum quotient (AQ) scores. During each trial, nine-line segments with various orientations were arrayed in simple or complex configurations and presented in both memory and test displays. Typically, VSTM capacity decreases with increasing configuration complexity. We found that VSTM capacity for simple configurations was larger than for complex configurations in individuals reporting low AQ, whereas for individuals reporting high AQ, there were no significant differences between these configurations. These results suggest that the effects of spatial complexity on VSTM capacity could be observed in individuals reporting low AQ, but not in individuals reporting high AQ. En ligne : http://dx.doi.org/10.1007/s10803-012-1711-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202 Joint Analysis of Band-Specific Functional Connectivity and Signal Complexity in Autism / Yasser GHANBARI in Journal of Autism and Developmental Disorders, 45-2 (February 2015)
[article]
Titre : Joint Analysis of Band-Specific Functional Connectivity and Signal Complexity in Autism Type de document : Texte imprimé et/ou numérique Auteurs : Yasser GHANBARI, Auteur ; Luke BLOY, Auteur ; J. CHRISTOPHER EDGAR, Auteur ; Lisa BLASKEY, Auteur ; Ragini VERMA, Auteur ; Timothy P. L. ROBERTS, Auteur Article en page(s) : p.444-460 Langues : Anglais (eng) Mots-clés : Autism Magnetoencephalography (MEG) Resting-state Connectivity Complexity Synchronization likelihood (SL) Multi-scale entropy (MSE) Index. décimale : PER Périodiques Résumé : Examination of resting state brain activity using electrophysiological measures like complexity as well as functional connectivity is of growing interest in the study of autism spectrum disorders (ASD). The present paper jointly examined complexity and connectivity to obtain a more detailed characterization of resting state brain activity in ASD. Multi-scale entropy was computed to quantify the signal complexity, and synchronization likelihood was used to evaluate functional connectivity (FC), with node strength values providing a sensor-level measure of connectivity to facilitate comparisons with complexity. Sensor level analysis of complexity and connectivity was performed at different frequency bands computed from resting state MEG from 26 children with ASD and 22 typically developing controls (TD). Analyses revealed band-specific group differences in each measure that agreed with other functional studies in fMRI and EEG: higher complexity in TD than ASD, in frontal regions in the delta band and occipital-parietal regions in the alpha band, and lower complexity in TD than in ASD in delta (parietal regions), theta (central and temporal regions) and gamma (frontal-central boundary regions); increased short-range connectivity in ASD in the frontal lobe in the delta band and long-range connectivity in the temporal, parietal and occipital lobes in the alpha band. Finally, and perhaps most strikingly, group differences between ASD and TD in complexity and FC appear spatially complementary, such that where FC was elevated in ASD, complexity was reduced (and vice versa). The correlation of regional average complexity and connectivity node strength with symptom severity scores of ASD subjects supported the overall complementarity (with opposing sign) of connectivity and complexity measures, pointing to either diminished connectivity leading to elevated entropy due to poor inhibitory regulation or chaotic signals prohibiting effective measure of connectivity. En ligne : http://dx.doi.org/10.1007/s10803-013-1915-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=258
in Journal of Autism and Developmental Disorders > 45-2 (February 2015) . - p.444-460[article] Joint Analysis of Band-Specific Functional Connectivity and Signal Complexity in Autism [Texte imprimé et/ou numérique] / Yasser GHANBARI, Auteur ; Luke BLOY, Auteur ; J. CHRISTOPHER EDGAR, Auteur ; Lisa BLASKEY, Auteur ; Ragini VERMA, Auteur ; Timothy P. L. ROBERTS, Auteur . - p.444-460.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 45-2 (February 2015) . - p.444-460
Mots-clés : Autism Magnetoencephalography (MEG) Resting-state Connectivity Complexity Synchronization likelihood (SL) Multi-scale entropy (MSE) Index. décimale : PER Périodiques Résumé : Examination of resting state brain activity using electrophysiological measures like complexity as well as functional connectivity is of growing interest in the study of autism spectrum disorders (ASD). The present paper jointly examined complexity and connectivity to obtain a more detailed characterization of resting state brain activity in ASD. Multi-scale entropy was computed to quantify the signal complexity, and synchronization likelihood was used to evaluate functional connectivity (FC), with node strength values providing a sensor-level measure of connectivity to facilitate comparisons with complexity. Sensor level analysis of complexity and connectivity was performed at different frequency bands computed from resting state MEG from 26 children with ASD and 22 typically developing controls (TD). Analyses revealed band-specific group differences in each measure that agreed with other functional studies in fMRI and EEG: higher complexity in TD than ASD, in frontal regions in the delta band and occipital-parietal regions in the alpha band, and lower complexity in TD than in ASD in delta (parietal regions), theta (central and temporal regions) and gamma (frontal-central boundary regions); increased short-range connectivity in ASD in the frontal lobe in the delta band and long-range connectivity in the temporal, parietal and occipital lobes in the alpha band. Finally, and perhaps most strikingly, group differences between ASD and TD in complexity and FC appear spatially complementary, such that where FC was elevated in ASD, complexity was reduced (and vice versa). The correlation of regional average complexity and connectivity node strength with symptom severity scores of ASD subjects supported the overall complementarity (with opposing sign) of connectivity and complexity measures, pointing to either diminished connectivity leading to elevated entropy due to poor inhibitory regulation or chaotic signals prohibiting effective measure of connectivity. En ligne : http://dx.doi.org/10.1007/s10803-013-1915-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=258 Context processing in adolescents with autism spectrum disorder: How complex could it be? / Dekel BEN-YOSEF in Autism Research, 10-3 (March 2017)
[article]
Titre : Context processing in adolescents with autism spectrum disorder: How complex could it be? Type de document : Texte imprimé et/ou numérique Auteurs : Dekel BEN-YOSEF, Auteur ; David ANAKI, Auteur ; Ofer GOLAN, Auteur Article en page(s) : p.520-530 Langues : Anglais (eng) Mots-clés : autism spectrum disorder context processing priming central coherence social cognition complexity Index. décimale : PER Périodiques Résumé : The ability of individuals with Autism Spectrum Disorder (ASD) to process context has long been debated: According to the Weak Central Coherence theory, ASD is characterized by poor global processing, and consequently—poor context processing. In contrast, the Social Cognition theory argues individuals with ASD will present difficulties only in social context processing. The complexity theory of autism suggests context processing in ASD will depend on task complexity. The current study examined this controversy through two priming tasks, one presenting human stimuli (facial expressions) and the other presenting non-human stimuli (animal faces). Both tasks presented visual targets, preceded by congruent, incongruent, or neutral auditory primes. Local and global processing were examined by presenting the visual targets in three spatial frequency conditions: High frequency, low frequency, and broadband. Tasks were administered to 16 adolescents with high functioning ASD and 16 matched typically developing adolescents. Reaction time and accuracy were measured for each task in each condition. Results indicated that individuals with ASD processed context for both human and non-human stimuli, except in one condition, in which human stimuli had to be processed globally (i.e., target presented in low frequency). The task demands presented in this condition, and the performance deficit shown in the ASD group as a result, could be understood in terms of cognitive overload. These findings provide support for the complexity theory of autism and extend it. Our results also demonstrate how associative priming could support intact context processing of human and non-human stimuli in individuals with ASD. En ligne : http://dx.doi.org/10.1002/aur.1676 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304
in Autism Research > 10-3 (March 2017) . - p.520-530[article] Context processing in adolescents with autism spectrum disorder: How complex could it be? [Texte imprimé et/ou numérique] / Dekel BEN-YOSEF, Auteur ; David ANAKI, Auteur ; Ofer GOLAN, Auteur . - p.520-530.
Langues : Anglais (eng)
in Autism Research > 10-3 (March 2017) . - p.520-530
Mots-clés : autism spectrum disorder context processing priming central coherence social cognition complexity Index. décimale : PER Périodiques Résumé : The ability of individuals with Autism Spectrum Disorder (ASD) to process context has long been debated: According to the Weak Central Coherence theory, ASD is characterized by poor global processing, and consequently—poor context processing. In contrast, the Social Cognition theory argues individuals with ASD will present difficulties only in social context processing. The complexity theory of autism suggests context processing in ASD will depend on task complexity. The current study examined this controversy through two priming tasks, one presenting human stimuli (facial expressions) and the other presenting non-human stimuli (animal faces). Both tasks presented visual targets, preceded by congruent, incongruent, or neutral auditory primes. Local and global processing were examined by presenting the visual targets in three spatial frequency conditions: High frequency, low frequency, and broadband. Tasks were administered to 16 adolescents with high functioning ASD and 16 matched typically developing adolescents. Reaction time and accuracy were measured for each task in each condition. Results indicated that individuals with ASD processed context for both human and non-human stimuli, except in one condition, in which human stimuli had to be processed globally (i.e., target presented in low frequency). The task demands presented in this condition, and the performance deficit shown in the ASD group as a result, could be understood in terms of cognitive overload. These findings provide support for the complexity theory of autism and extend it. Our results also demonstrate how associative priming could support intact context processing of human and non-human stimuli in individuals with ASD. En ligne : http://dx.doi.org/10.1002/aur.1676 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304 Differences in the Efficiency of Pattern Encoding in Relation to Autistic-Like Traits: An Event-Related Potential Study / Junichi TAKAHASHI in Journal of Autism and Developmental Disorders, 44-11 (November 2014)
[article]
Titre : Differences in the Efficiency of Pattern Encoding in Relation to Autistic-Like Traits: An Event-Related Potential Study Type de document : Texte imprimé et/ou numérique Auteurs : Junichi TAKAHASHI, Auteur ; Daichi YASUNAGA, Auteur ; Jiro GYOBA, Auteur Article en page(s) : p.2895-2907 Langues : Anglais (eng) Mots-clés : Autism spectrum quotient Complexity Encoding efficiency Event-related potential Index. décimale : PER Périodiques Résumé : We examined the effects of complexity on the efficiency of pattern encoding in the general population differing on autism-spectrum quotient (AQ) scores. We compared brain activity (electroencephalography) during a same-different task for High and Low AQ groups. The task was composed of identical comparison and categorical comparison (CC) conditions that presented simple or complex patterns. In the CC condition, the Low AQ showed large P3b amplitudes with simple patterns than with complex patterns, whereas the High AQ showed the same amplitude levels for these patterns. These indicate that, similar to simple patterns, complex patterns are efficiently encoded in the High AQ. Moreover, the High AQ had no impairment in the global pattern encoding compared with the Low AQ. En ligne : http://dx.doi.org/10.1007/s10803-014-2150-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=241
in Journal of Autism and Developmental Disorders > 44-11 (November 2014) . - p.2895-2907[article] Differences in the Efficiency of Pattern Encoding in Relation to Autistic-Like Traits: An Event-Related Potential Study [Texte imprimé et/ou numérique] / Junichi TAKAHASHI, Auteur ; Daichi YASUNAGA, Auteur ; Jiro GYOBA, Auteur . - p.2895-2907.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 44-11 (November 2014) . - p.2895-2907
Mots-clés : Autism spectrum quotient Complexity Encoding efficiency Event-related potential Index. décimale : PER Périodiques Résumé : We examined the effects of complexity on the efficiency of pattern encoding in the general population differing on autism-spectrum quotient (AQ) scores. We compared brain activity (electroencephalography) during a same-different task for High and Low AQ groups. The task was composed of identical comparison and categorical comparison (CC) conditions that presented simple or complex patterns. In the CC condition, the Low AQ showed large P3b amplitudes with simple patterns than with complex patterns, whereas the High AQ showed the same amplitude levels for these patterns. These indicate that, similar to simple patterns, complex patterns are efficiently encoded in the High AQ. Moreover, the High AQ had no impairment in the global pattern encoding compared with the Low AQ. En ligne : http://dx.doi.org/10.1007/s10803-014-2150-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=241 Editorial: Capturing the dynamics of development and psychopathology: from neural circuits to global trends / Richard M. PASCO FEARON in Journal of Child Psychology and Psychiatry, 56-3 (March 2015)
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