372 recherche sur le mot-clé 'Visual-stimulus-intensity'

Intensity to force translation: a new effect of stimulus-response compatibility revealed by analysis of response time and electromyographic activity of a prime mover / Patricia ROMAIGUERE in Cognitive Brain Research, 1-3 (October 1993)

Public ISBD [article]  inCognitive Brain Research > 1-3 (October 1993) . - p.197-201 Titre : Intensity to force translation: a new effect of stimulus-response compatibility revealed by analysis of response time and electromyographic activity of a prime mover Type de document : texte imprimé Auteurs : Patricia ROMAIGUERE, Auteur ; Thierry HASBRIUCQ, Auteur ; Camille-Aimé POSSAMAI, Auteur ; John SEAL, Auteur Année de publication : 1993 Article en page(s) : p.197-201 Langues : Anglais (eng) Mots-clés : Fractionated-reaction-time Visual-stimulus-intensity Isometric-contraction Man Index. décimale : PER Périodiques Résumé : In reaction time studies of stimulus-response compatibility, emphasis has been placed on the influence of spatial stimulus-response relationships, but what seems to be essential for the emergence of an effect of stimulus-response compatibility is the existence of a conceptual match between stimulus and response variables. This notion was at the origin of the present study to assess the compatibility relationship between the intensity of a visual stimulus and the force of a voluntary muscle contraction. A stimulus-response compatibility effect was demonstrated. This effect was entirely due to premotoric processes. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=781 [article] Intensity to force translation: a new effect of stimulus-response compatibility revealed by analysis of response time and electromyographic activity of a prime mover [texte imprimé] / Patricia ROMAIGUERE, Auteur ; Thierry HASBRIUCQ, Auteur ; Camille-Aimé POSSAMAI, Auteur ; John SEAL, Auteur . - 1993 . - p.197-201. Langues : Anglais (eng) in Cognitive Brain Research > 1-3 (October 1993) . - p.197-201 Mots-clés : Fractionated-reaction-time Visual-stimulus-intensity Isometric-contraction Man Index. décimale : PER Périodiques Résumé : In reaction time studies of stimulus-response compatibility, emphasis has been placed on the influence of spatial stimulus-response relationships, but what seems to be essential for the emergence of an effect of stimulus-response compatibility is the existence of a conceptual match between stimulus and response variables. This notion was at the origin of the present study to assess the compatibility relationship between the intensity of a visual stimulus and the force of a voluntary muscle contraction. A stimulus-response compatibility effect was demonstrated. This effect was entirely due to premotoric processes. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=781

Altered modulation of gamma oscillation frequency by speed of visual motion in children with autism spectrum disorders / Tatiana A. STROGANOVA in Journal of Neurodevelopmental Disorders, 7-1 (December 2015)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 7-1 (December 2015) . - p.21 Titre : Altered modulation of gamma oscillation frequency by speed of visual motion in children with autism spectrum disorders Type de document : texte imprimé Auteurs : Tatiana A. STROGANOVA, Auteur ; Anna V. BUTORINA, Auteur ; Olga V. SYSOEVA, Auteur ; Andrey O. PROKOFYEV, Auteur ; Anastasia Yu NIKOLAEVA, Auteur ; Marina M. TSETLIN, Auteur ; Elena V. OREKHOVA, Auteur Article en page(s) : p.21 Langues : Anglais (eng) Mots-clés : Asd  Oblique line orientation threshold  Stimulus velocity  Visual gamma oscillation frequency Index. décimale : PER Périodiques Résumé : BACKGROUND: Recent studies link autism spectrum disorders (ASD) with an altered balance between excitation and inhibition (E/I balance) in cortical networks. The brain oscillations in high gamma-band (50-120 Hz) are sensitive to the E/I balance and may appear useful biomarkers of certain ASD subtypes. The frequency of gamma oscillations is mediated by level of excitation of the fast-spiking inhibitory basket cells recruited by increasing strength of excitatory input. Therefore, the experimental manipulations affecting gamma frequency may throw light on inhibitory networks dysfunction in ASD. METHODS: Here, we used magnetoencephalography (MEG) to investigate modulation of visual gamma oscillation frequency by speed of drifting annular gratings (1.2, 3.6, 6.0 degrees /s) in 21 boys with ASD and 26 typically developing boys aged 7-15 years. Multitaper method was used for analysis of spectra of gamma power change upon stimulus presentation and permutation test was applied for statistical comparisons. We also assessed in our participants visual orientation discrimination thresholds, which are thought to depend on excitability of inhibitory networks in the visual cortex. RESULTS: Although frequency of the oscillatory gamma response increased with increasing velocity of visual motion in both groups of participants, the velocity effect was reduced in a substantial proportion of children with ASD. The range of velocity-related gamma frequency modulation correlated inversely with the ability to discriminate oblique line orientation in the ASD group, while no such correlation has been observed in the group of typically developing participants. CONCLUSIONS: Our findings suggest that abnormal velocity-related gamma frequency modulation in ASD may constitute a potential biomarker for reduced excitability of fast-spiking inhibitory neurons in a subset of children with ASD. En ligne : http://dx.doi.org/10.1186/s11689-015-9121-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=347 [article] Altered modulation of gamma oscillation frequency by speed of visual motion in children with autism spectrum disorders [texte imprimé] / Tatiana A. STROGANOVA, Auteur ; Anna V. BUTORINA, Auteur ; Olga V. SYSOEVA, Auteur ; Andrey O. PROKOFYEV, Auteur ; Anastasia Yu NIKOLAEVA, Auteur ; Marina M. TSETLIN, Auteur ; Elena V. OREKHOVA, Auteur . - p.21. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 7-1 (December 2015) . - p.21 Mots-clés : Asd  Oblique line orientation threshold  Stimulus velocity  Visual gamma oscillation frequency Index. décimale : PER Périodiques Résumé : BACKGROUND: Recent studies link autism spectrum disorders (ASD) with an altered balance between excitation and inhibition (E/I balance) in cortical networks. The brain oscillations in high gamma-band (50-120 Hz) are sensitive to the E/I balance and may appear useful biomarkers of certain ASD subtypes. The frequency of gamma oscillations is mediated by level of excitation of the fast-spiking inhibitory basket cells recruited by increasing strength of excitatory input. Therefore, the experimental manipulations affecting gamma frequency may throw light on inhibitory networks dysfunction in ASD. METHODS: Here, we used magnetoencephalography (MEG) to investigate modulation of visual gamma oscillation frequency by speed of drifting annular gratings (1.2, 3.6, 6.0 degrees /s) in 21 boys with ASD and 26 typically developing boys aged 7-15 years. Multitaper method was used for analysis of spectra of gamma power change upon stimulus presentation and permutation test was applied for statistical comparisons. We also assessed in our participants visual orientation discrimination thresholds, which are thought to depend on excitability of inhibitory networks in the visual cortex. RESULTS: Although frequency of the oscillatory gamma response increased with increasing velocity of visual motion in both groups of participants, the velocity effect was reduced in a substantial proportion of children with ASD. The range of velocity-related gamma frequency modulation correlated inversely with the ability to discriminate oblique line orientation in the ASD group, while no such correlation has been observed in the group of typically developing participants. CONCLUSIONS: Our findings suggest that abnormal velocity-related gamma frequency modulation in ASD may constitute a potential biomarker for reduced excitability of fast-spiking inhibitory neurons in a subset of children with ASD. En ligne : http://dx.doi.org/10.1186/s11689-015-9121-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=347

Accurate or Assumed: Visual Learning in Children with ASD / David TREMBATH in Journal of Autism and Developmental Disorders, 45-10 (October 2015)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 45-10 (October 2015) . - p.3276-3287 Titre : Accurate or Assumed: Visual Learning in Children with ASD Type de document : texte imprimé Auteurs : David TREMBATH, Auteur ; Giacomo VIVANTI, Auteur ; Teresa IACONO, Auteur ; Cheryl DISSANAYAKE, Auteur Article en page(s) : p.3276-3287 Langues : Anglais (eng) Mots-clés : Autism  Augmentative communication  AAC  Visual attention Index. décimale : PER Périodiques Résumé : Children with autism spectrum disorder (ASD) are often described as visual learners. We tested this assumption in an experiment in which 25 children with ASD, 19 children with global developmental delay (GDD), and 17 typically developing (TD) children were presented a series of videos via an eye tracker in which an actor instructed them to manipulate objects in speech-only and speech + pictures conditions. We found no group differences in visual attention to the stimuli. The GDD and TD groups performed better when pictures were available, whereas the ASD group did not. Performance of children with ASD and GDD was positively correlated with visual attention and receptive language. We found no evidence of a prominent visual learning style in the ASD group. En ligne : http://dx.doi.org/10.1007/s10803-015-2488-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=267 [article] Accurate or Assumed: Visual Learning in Children with ASD [texte imprimé] / David TREMBATH, Auteur ; Giacomo VIVANTI, Auteur ; Teresa IACONO, Auteur ; Cheryl DISSANAYAKE, Auteur . - p.3276-3287. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 45-10 (October 2015) . - p.3276-3287 Mots-clés : Autism  Augmentative communication  AAC  Visual attention Index. décimale : PER Périodiques Résumé : Children with autism spectrum disorder (ASD) are often described as visual learners. We tested this assumption in an experiment in which 25 children with ASD, 19 children with global developmental delay (GDD), and 17 typically developing (TD) children were presented a series of videos via an eye tracker in which an actor instructed them to manipulate objects in speech-only and speech + pictures conditions. We found no group differences in visual attention to the stimuli. The GDD and TD groups performed better when pictures were available, whereas the ASD group did not. Performance of children with ASD and GDD was positively correlated with visual attention and receptive language. We found no evidence of a prominent visual learning style in the ASD group. En ligne : http://dx.doi.org/10.1007/s10803-015-2488-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=267

Acquisition and Use of 'Priors' in Autism: Typical in Deciding Where to Look, Atypical in Deciding What Is There / Fredrik ALLENMARK in Journal of Autism and Developmental Disorders, 51-10 (October 2021)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 51-10 (October 2021) . - p.3744-3758 Titre : Acquisition and Use of 'Priors' in Autism: Typical in Deciding Where to Look, Atypical in Deciding What Is There Type de document : texte imprimé Auteurs : Fredrik ALLENMARK, Auteur ; Zhuanghua SHI, Auteur ; Rasmus L. PISTORIUS, Auteur ; Laura A. THEISINGER, Auteur ; Nikolaos KOUTSOULERIS, Auteur ; P. FALKAI, Auteur ; Hermann J. MÃœLLER, Auteur ; Christine M. FALTER-WAGNER, Auteur Article en page(s) : p.3744-3758 Langues : Anglais (eng) Mots-clés : Attention  Autism Spectrum Disorder  Autistic Disorder  Humans  Knowledge  Learning  Reaction Time  Predictive coding  Visual attention  Visual search Index. décimale : PER Périodiques Résumé : Individuals with Autism Spectrum Disorder (ASD) are thought to under-rely on prior knowledge in perceptual decision-making. This study examined whether this applies to decisions of attention allocation, of relevance for 'predictive-coding' accounts of ASD. In a visual search task, a salient but task-irrelevant distractor appeared with higher probability in one display half. Individuals with ASD learned to avoid 'attentional capture' by distractors in the probable region as effectively as control participants-indicating typical priors for deploying attention. However, capture by a 'surprising' distractor at an unlikely location led to greatly slowed identification of a subsequent target at that location-indicating that individuals with ASD attempt to control surprise (unexpected attentional capture) by over-regulating parameters in post-selective decision-making. En ligne : http://dx.doi.org/10.1007/s10803-020-04828-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453 [article] Acquisition and Use of 'Priors' in Autism: Typical in Deciding Where to Look, Atypical in Deciding What Is There [texte imprimé] / Fredrik ALLENMARK, Auteur ; Zhuanghua SHI, Auteur ; Rasmus L. PISTORIUS, Auteur ; Laura A. THEISINGER, Auteur ; Nikolaos KOUTSOULERIS, Auteur ; P. FALKAI, Auteur ; Hermann J. MÃœLLER, Auteur ; Christine M. FALTER-WAGNER, Auteur . - p.3744-3758. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 51-10 (October 2021) . - p.3744-3758 Mots-clés : Attention  Autism Spectrum Disorder  Autistic Disorder  Humans  Knowledge  Learning  Reaction Time  Predictive coding  Visual attention  Visual search Index. décimale : PER Périodiques Résumé : Individuals with Autism Spectrum Disorder (ASD) are thought to under-rely on prior knowledge in perceptual decision-making. This study examined whether this applies to decisions of attention allocation, of relevance for 'predictive-coding' accounts of ASD. In a visual search task, a salient but task-irrelevant distractor appeared with higher probability in one display half. Individuals with ASD learned to avoid 'attentional capture' by distractors in the probable region as effectively as control participants-indicating typical priors for deploying attention. However, capture by a 'surprising' distractor at an unlikely location led to greatly slowed identification of a subsequent target at that location-indicating that individuals with ASD attempt to control surprise (unexpected attentional capture) by over-regulating parameters in post-selective decision-making. En ligne : http://dx.doi.org/10.1007/s10803-020-04828-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453

Adolescent relational roots of adult blood pressure: A 14-year prospective study / Joseph P. ALLEN in Development and Psychopathology, 34-5 (December 2022)  

Public ISBD [article]  inDevelopment and Psychopathology > 34-5 (December 2022) . - p.1986-1996 Titre : Adolescent relational roots of adult blood pressure: A 14-year prospective study Type de document : texte imprimé Auteurs : Joseph P. ALLEN, Auteur ; Emily L. LOEB, Auteur ; Joseph TAN, Auteur ; Alida A. DAVIS, Auteur ; Bert UCHINO, Auteur Article en page(s) : p.1986-1996 Langues : Anglais (eng) Mots-clés : romantic relationships  blood pressure  adolescence  intensity Index. décimale : PER Périodiques Résumé : Intensity in adolescent romantic relationships was examined as a long-term predictor of higher adult blood pressure in a community sample followed from age 17 to 31 years. Romantic intensity in adolescence “ measured via the amount of time spent alone with a partner and the duration of the relationship “ was predicted by parents’ psychologically controlling behavior and was in turn found to predict higher resting adult systolic and diastolic blood pressure even after accounting for relevant covariates. The prediction to adult blood pressure was partially mediated via conflict in nonromantic adult friendships and intensity in adult romantic relationships. Even after accounting for these mediators, however, a direct path from adolescent romantic intensity to higher adult blood pressure remained. Neither family income in adolescence nor trait measures of personality assessed in adulthood accounted for these findings. The results of this study are interpreted both as providing further support for the view that adolescent social relationship qualities have substantial long-term implications for adult health, as well as suggesting a potential physiological mechanism by which adolescent relationships may be linked to adult health outcomes. En ligne : http://dx.doi.org/10.1017/S0954579421000419 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=492 [article] Adolescent relational roots of adult blood pressure: A 14-year prospective study [texte imprimé] / Joseph P. ALLEN, Auteur ; Emily L. LOEB, Auteur ; Joseph TAN, Auteur ; Alida A. DAVIS, Auteur ; Bert UCHINO, Auteur . - p.1986-1996. Langues : Anglais (eng) in Development and Psychopathology > 34-5 (December 2022) . - p.1986-1996 Mots-clés : romantic relationships  blood pressure  adolescence  intensity Index. décimale : PER Périodiques Résumé : Intensity in adolescent romantic relationships was examined as a long-term predictor of higher adult blood pressure in a community sample followed from age 17 to 31 years. Romantic intensity in adolescence “ measured via the amount of time spent alone with a partner and the duration of the relationship “ was predicted by parents’ psychologically controlling behavior and was in turn found to predict higher resting adult systolic and diastolic blood pressure even after accounting for relevant covariates. The prediction to adult blood pressure was partially mediated via conflict in nonromantic adult friendships and intensity in adult romantic relationships. Even after accounting for these mediators, however, a direct path from adolescent romantic intensity to higher adult blood pressure remained. Neither family income in adolescence nor trait measures of personality assessed in adulthood accounted for these findings. The results of this study are interpreted both as providing further support for the view that adolescent social relationship qualities have substantial long-term implications for adult health, as well as suggesting a potential physiological mechanism by which adolescent relationships may be linked to adult health outcomes. En ligne : http://dx.doi.org/10.1017/S0954579421000419 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=492

Age-Related Changes in Conjunctive Visual Search in Children with and without ASD / Grace IAROCCI in Autism Research, 7-2 (April 2014)  

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Age trends in visual exploration of social and nonsocial information in children with autism / Jed T. ELISON in Research in Autism Spectrum Disorders, 6-2 (April-June 2012)  

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Allocentric Versus Egocentric Spatial Memory in Adults with Autism Spectrum Disorder / Melanie RING in Journal of Autism and Developmental Disorders, 48-6 (June 2018)  

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Alpha modulation during working memory encoding predicts neurocognitive impairment in ADHD / Agatha LENARTOWICZ in Journal of Child Psychology and Psychiatry, 60-8 (August 2019)  

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Alterations in Rapid Social Evaluations in Individuals with High Autism Traits / Casey BECKER in Journal of Autism and Developmental Disorders, 51-10 (October 2021)  

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