6 recherche sur le mot-clé 'Psychophysics'

Perception of odors and tastes in autism spectrum disorders: A systematic review of assessments / Mohamed A. BOUDJARANE in Autism Research, 10-6 (June 2017)  

Public ISBD [article]  inAutism Research > 10-6 (June 2017) . - p.1045-1057 Titre : Perception of odors and tastes in autism spectrum disorders: A systematic review of assessments Type de document : Texte imprimé et/ou numérique Auteurs : Mohamed A. BOUDJARANE, Auteur ; Marine GRANDGEORGE, Auteur ; Rémi MARIANOWSKI, Auteur ; Laurent MISERY, Auteur ; Eric LEMONNIER, Auteur Article en page(s) : p.1045-1057 Langues : Anglais (eng) Mots-clés : autism spectrum disorders  sensory dysfunctions  sensory system  psychophysics  review Index. décimale : PER Périodiques Résumé : Olfaction and gustation are major sensory functions implied in processing environmental stimuli. Some evidences suggest that loss of olfactory function is an early biomarker for neurodegenerative disorders and atypical processing of odor and taste stimuli is present in several neurodevelopmental disorders, notably in Autism Spectrum Disorders (ASD). In this paper, we conducted a systematic review investigating the assessments of olfaction and gustation with psychophysics methods in individuals with ASD. Pubmed, PMC and Sciencedirect were scrutinized for relevant literature published from 1970 to 2015. In this review, fourteen papers met our inclusion criteria. They were analyzed critically in order to evaluate the occurrence of olfactory and gustatory dysfunction in ASD, as well as to report the methods used to assess olfaction and gustation in such conditions. Regarding to these two senses, the overall number of studies is low. Most of studies show significant difference regarding to odor or taste identification but not for detection threshold. Overall, odor rating through pleasantness, intensity and familiarity do not differ significantly between control and individuals with ASD. The current evidences can suggest the presence of olfactory and gustatory dysfunction in ASD. Therefore, our analysis show a heterogeneity of findings. This is due to several methodological limitations such as the tools used or population studied. Understanding these disorders could help to shed light on other atypical behavior in this population such as feeding or social behavior. En ligne : http://dx.doi.org/10.1002/aur.1760 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=309 [article] Perception of odors and tastes in autism spectrum disorders: A systematic review of assessments [Texte imprimé et/ou numérique] / Mohamed A. BOUDJARANE, Auteur ; Marine GRANDGEORGE, Auteur ; Rémi MARIANOWSKI, Auteur ; Laurent MISERY, Auteur ; Eric LEMONNIER, Auteur . - p.1045-1057. Langues : Anglais (eng) in Autism Research > 10-6 (June 2017) . - p.1045-1057 Mots-clés : autism spectrum disorders  sensory dysfunctions  sensory system  psychophysics  review Index. décimale : PER Périodiques Résumé : Olfaction and gustation are major sensory functions implied in processing environmental stimuli. Some evidences suggest that loss of olfactory function is an early biomarker for neurodegenerative disorders and atypical processing of odor and taste stimuli is present in several neurodevelopmental disorders, notably in Autism Spectrum Disorders (ASD). In this paper, we conducted a systematic review investigating the assessments of olfaction and gustation with psychophysics methods in individuals with ASD. Pubmed, PMC and Sciencedirect were scrutinized for relevant literature published from 1970 to 2015. In this review, fourteen papers met our inclusion criteria. They were analyzed critically in order to evaluate the occurrence of olfactory and gustatory dysfunction in ASD, as well as to report the methods used to assess olfaction and gustation in such conditions. Regarding to these two senses, the overall number of studies is low. Most of studies show significant difference regarding to odor or taste identification but not for detection threshold. Overall, odor rating through pleasantness, intensity and familiarity do not differ significantly between control and individuals with ASD. The current evidences can suggest the presence of olfactory and gustatory dysfunction in ASD. Therefore, our analysis show a heterogeneity of findings. This is due to several methodological limitations such as the tools used or population studied. Understanding these disorders could help to shed light on other atypical behavior in this population such as feeding or social behavior. En ligne : http://dx.doi.org/10.1002/aur.1760 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=309

Perceptual and Neural Response to Affective Tactile Texture Stimulation in Adults with Autism Spectrum Disorders / Carissa J. CASCIO in Autism Research, 5-4 (August 2012)  

Public ISBD [article]  inAutism Research > 5-4 (August 2012) . - p.231-44 Titre : Perceptual and Neural Response to Affective Tactile Texture Stimulation in Adults with Autism Spectrum Disorders Type de document : Texte imprimé et/ou numérique Auteurs : Carissa J. CASCIO, Auteur ; Estephan J. MOANA-FILHO, Auteur ; Steve GUEST, Auteur ; Mary Beth NEBEL, Auteur ; Jonathan WEISNER, Auteur ; Grace T. BARANEK, Auteur ; Gregory ESSICK, Auteur Année de publication : 2012 Article en page(s) : p.231-44 Langues : Anglais (eng) Mots-clés : touch  fMRI  sensory  adults  psychophysics  affective Index. décimale : PER Périodiques Résumé : Autism spectrum disorders (ASD) are associated with differences in sensory sensitivity and affective response to sensory stimuli, the neural basis of which is still largely unknown. We used psychophysics and functional magnetic resonance imaging (fMRI) to investigate responses to somatosensory stimulation with three textured surfaces that spanned a range of roughness and pleasantness in a sample of adults with ASD and a control group. While psychophysical ratings of roughness and pleasantness were largely similar across the two groups, the ASD group gave pleasant and unpleasant textures more extreme average ratings than did controls. In addition, their ratings for a neutral texture were more variable than controls, indicating they are less consistent in evaluating a stimulus that is affectively ambiguous. Changes in brain blood oxygenation level-dependent (BOLD) signal in response to stimulation with these textures differed substantially between the groups, with the ASD group exhibiting diminished responses compared to the control group, particularly for pleasant and neutral textures. For the most unpleasant texture, the ASD group exhibited greater BOLD response than controls in affective somatosensory processing areas such as the posterior cingulate cortex and the insula. The amplitude of response in the insula in response to the unpleasant texture was positively correlated with social impairment as measured by the Autism Diagnostic Interview-Revised (ADI-R). These results suggest that people with ASD tend to show diminished response to pleasant and neutral stimuli, and exaggerated limbic responses to unpleasant stimuli, which may contribute to diminished social reward associated with touch, perpetuating social withdrawal, and aberrant social development. En ligne : http://dx.doi.org/10.1002/aur.1224 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=179 [article] Perceptual and Neural Response to Affective Tactile Texture Stimulation in Adults with Autism Spectrum Disorders [Texte imprimé et/ou numérique] / Carissa J. CASCIO, Auteur ; Estephan J. MOANA-FILHO, Auteur ; Steve GUEST, Auteur ; Mary Beth NEBEL, Auteur ; Jonathan WEISNER, Auteur ; Grace T. BARANEK, Auteur ; Gregory ESSICK, Auteur . - 2012 . - p.231-44. Langues : Anglais (eng) in Autism Research > 5-4 (August 2012) . - p.231-44 Mots-clés : touch  fMRI  sensory  adults  psychophysics  affective Index. décimale : PER Périodiques Résumé : Autism spectrum disorders (ASD) are associated with differences in sensory sensitivity and affective response to sensory stimuli, the neural basis of which is still largely unknown. We used psychophysics and functional magnetic resonance imaging (fMRI) to investigate responses to somatosensory stimulation with three textured surfaces that spanned a range of roughness and pleasantness in a sample of adults with ASD and a control group. While psychophysical ratings of roughness and pleasantness were largely similar across the two groups, the ASD group gave pleasant and unpleasant textures more extreme average ratings than did controls. In addition, their ratings for a neutral texture were more variable than controls, indicating they are less consistent in evaluating a stimulus that is affectively ambiguous. Changes in brain blood oxygenation level-dependent (BOLD) signal in response to stimulation with these textures differed substantially between the groups, with the ASD group exhibiting diminished responses compared to the control group, particularly for pleasant and neutral textures. For the most unpleasant texture, the ASD group exhibited greater BOLD response than controls in affective somatosensory processing areas such as the posterior cingulate cortex and the insula. The amplitude of response in the insula in response to the unpleasant texture was positively correlated with social impairment as measured by the Autism Diagnostic Interview-Revised (ADI-R). These results suggest that people with ASD tend to show diminished response to pleasant and neutral stimuli, and exaggerated limbic responses to unpleasant stimuli, which may contribute to diminished social reward associated with touch, perpetuating social withdrawal, and aberrant social development. En ligne : http://dx.doi.org/10.1002/aur.1224 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=179

Endogenous Spatial Attention: Evidence for Intact Functioning in Adults With Autism / Michael A. GRUBB in Autism Research, 6-2 (April 2013)  

Public ISBD [article]  inAutism Research > 6-2 (April 2013) . - p.108-118 Titre : Endogenous Spatial Attention: Evidence for Intact Functioning in Adults With Autism Type de document : Texte imprimé et/ou numérique Auteurs : Michael A. GRUBB, Auteur ; Marlene BEHRMANN, Auteur ; Ryan EGAN, Auteur ; Nancy J. MINSHEW, Auteur ; Marisa CARRASCO, Auteur ; David J. HEEGER, Auteur Année de publication : 2013 Article en page(s) : p.108-118 Langues : Anglais (eng) Mots-clés : attention  spatial attention  endogenous attention  psychophysics  adults  autism  autism spectrum disorders  ASD Index. décimale : PER Périodiques Résumé : Rapid manipulation of the attention field (i.e. the location and spread of visual spatial attention) is a critical aspect of human cognition, and previous research on spatial attention in individuals with autism spectrum disorders (ASD) has produced inconsistent results. In a series of three psychophysical experiments, we evaluated claims in the literature that individuals with ASD exhibit a deficit in voluntarily controlling the deployment and size of the spatial attention field. We measured the spatial distribution of performance accuracies and reaction times to quantify the sizes and locations of the attention field, with and without spatial uncertainty (i.e. the lack of predictability concerning the spatial position of the upcoming stimulus). We found that high-functioning adults with autism exhibited slower reaction times overall with spatial uncertainty, but the effects of attention on performance accuracies and reaction times were indistinguishable between individuals with autism and typically developing individuals in all three experiments. These results provide evidence of intact endogenous spatial attention function in high-functioning adults with ASD, suggesting that atypical endogenous attention cannot be a latent characteristic of autism in general. En ligne : http://dx.doi.org/10.1002/aur.1269 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=199 [article] Endogenous Spatial Attention: Evidence for Intact Functioning in Adults With Autism [Texte imprimé et/ou numérique] / Michael A. GRUBB, Auteur ; Marlene BEHRMANN, Auteur ; Ryan EGAN, Auteur ; Nancy J. MINSHEW, Auteur ; Marisa CARRASCO, Auteur ; David J. HEEGER, Auteur . - 2013 . - p.108-118. Langues : Anglais (eng) in Autism Research > 6-2 (April 2013) . - p.108-118 Mots-clés : attention  spatial attention  endogenous attention  psychophysics  adults  autism  autism spectrum disorders  ASD Index. décimale : PER Périodiques Résumé : Rapid manipulation of the attention field (i.e. the location and spread of visual spatial attention) is a critical aspect of human cognition, and previous research on spatial attention in individuals with autism spectrum disorders (ASD) has produced inconsistent results. In a series of three psychophysical experiments, we evaluated claims in the literature that individuals with ASD exhibit a deficit in voluntarily controlling the deployment and size of the spatial attention field. We measured the spatial distribution of performance accuracies and reaction times to quantify the sizes and locations of the attention field, with and without spatial uncertainty (i.e. the lack of predictability concerning the spatial position of the upcoming stimulus). We found that high-functioning adults with autism exhibited slower reaction times overall with spatial uncertainty, but the effects of attention on performance accuracies and reaction times were indistinguishable between individuals with autism and typically developing individuals in all three experiments. These results provide evidence of intact endogenous spatial attention function in high-functioning adults with ASD, suggesting that atypical endogenous attention cannot be a latent characteristic of autism in general. En ligne : http://dx.doi.org/10.1002/aur.1269 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=199

Impaired Timing and Frequency Discrimination in High-functioning Autism Spectrum Disorders / Anjali BHATARA in Journal of Autism and Developmental Disorders, 43-10 (October 2013)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 43-10 (October 2013) . - p.2312-2328 Titre : Impaired Timing and Frequency Discrimination in High-functioning Autism Spectrum Disorders Type de document : Texte imprimé et/ou numérique Auteurs : Anjali BHATARA, Auteur ; Talin BABIKIAN, Auteur ; Elizabeth LAUGESON, Auteur ; Raffi TACHDJIAN, Auteur ; Yvonne S. SININGER, Auteur Article en page(s) : p.2312-2328 Langues : Anglais (eng) Mots-clés : Auditory perception  Psychophysics  Hyper-sensitivity  Asperger syndrome  High-functioning autism Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorders (ASD) frequently demonstrate preserved or enhanced frequency perception but impaired timing perception. The present study investigated the processing of spectral and temporal information in 12 adolescents with ASD and 15 age-matched controls. Participants completed two psychoacoustic tasks: one determined frequency difference limens, and the other determined gap detection thresholds. Results showed impaired frequency discrimination at the highest standard frequency in the ASD group but no overall difference between groups. However, when groups were defined by auditory hyper-sensitivity, a group difference arose. For the gap detection task, the ASD group demonstrated elevated thresholds. This supports previous research demonstrating a deficit in ASD in temporal perception and suggests a connection between hyper-sensitivity and frequency discrimination abilities. En ligne : http://dx.doi.org/10.1007/s10803-013-1778-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=215 [article] Impaired Timing and Frequency Discrimination in High-functioning Autism Spectrum Disorders [Texte imprimé et/ou numérique] / Anjali BHATARA, Auteur ; Talin BABIKIAN, Auteur ; Elizabeth LAUGESON, Auteur ; Raffi TACHDJIAN, Auteur ; Yvonne S. SININGER, Auteur . - p.2312-2328. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 43-10 (October 2013) . - p.2312-2328 Mots-clés : Auditory perception  Psychophysics  Hyper-sensitivity  Asperger syndrome  High-functioning autism Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorders (ASD) frequently demonstrate preserved or enhanced frequency perception but impaired timing perception. The present study investigated the processing of spectral and temporal information in 12 adolescents with ASD and 15 age-matched controls. Participants completed two psychoacoustic tasks: one determined frequency difference limens, and the other determined gap detection thresholds. Results showed impaired frequency discrimination at the highest standard frequency in the ASD group but no overall difference between groups. However, when groups were defined by auditory hyper-sensitivity, a group difference arose. For the gap detection task, the ASD group demonstrated elevated thresholds. This supports previous research demonstrating a deficit in ASD in temporal perception and suggests a connection between hyper-sensitivity and frequency discrimination abilities. En ligne : http://dx.doi.org/10.1007/s10803-013-1778-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=215

Self-reported Sensory Hypersensitivity Moderates Association Between Tactile Psychophysical Performance and Autism-Related Traits in Neurotypical Adults / Lauren K. BRYANT in Journal of Autism and Developmental Disorders, 49-8 (August 2019)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 49-8 (August 2019) . - p.3159-3172 Titre : Self-reported Sensory Hypersensitivity Moderates Association Between Tactile Psychophysical Performance and Autism-Related Traits in Neurotypical Adults Type de document : Texte imprimé et/ou numérique Auteurs : Lauren K. BRYANT, Auteur ; Tiffany G. WOYNAROSKI, Auteur ; Mark T. WALLACE, Auteur ; Carissa J. CASCIO, Auteur Article en page(s) : p.3159-3172 Langues : Anglais (eng) Mots-clés : Autism  Broader phenotype  Dynamic range  Psychophysics  Somatosensory  Tactile Index. décimale : PER Périodiques Résumé : Atypical responses to tactile stimulation have been linked to core domains of dysfunction in individuals with autism spectrum disorder (ASD) and phenotypic traits associated with ASD in neurotypical individuals. We investigated (a) the extent to which two psychophysically derived measures of tactile sensitivity-detection threshold and dynamic range-relate to traits associated with ASD and (b) whether those relations vary according to the presence of self-reported sensory hypersensitivities in neurotypical individuals. A narrow dynamic range was associated with increased autism-related traits in individuals who reported greater sensory hypersensitivity. In contrast, in individuals less prone to sensory hypersensitivity, a narrow dynamic range was associated with reduced autism-related traits. Findings highlight the potential importance of considering dynamic psychophysical metrics in future studies. En ligne : http://dx.doi.org/10.1007/s10803-019-04043-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=403 [article] Self-reported Sensory Hypersensitivity Moderates Association Between Tactile Psychophysical Performance and Autism-Related Traits in Neurotypical Adults [Texte imprimé et/ou numérique] / Lauren K. BRYANT, Auteur ; Tiffany G. WOYNAROSKI, Auteur ; Mark T. WALLACE, Auteur ; Carissa J. CASCIO, Auteur . - p.3159-3172. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 49-8 (August 2019) . - p.3159-3172 Mots-clés : Autism  Broader phenotype  Dynamic range  Psychophysics  Somatosensory  Tactile Index. décimale : PER Périodiques Résumé : Atypical responses to tactile stimulation have been linked to core domains of dysfunction in individuals with autism spectrum disorder (ASD) and phenotypic traits associated with ASD in neurotypical individuals. We investigated (a) the extent to which two psychophysically derived measures of tactile sensitivity-detection threshold and dynamic range-relate to traits associated with ASD and (b) whether those relations vary according to the presence of self-reported sensory hypersensitivities in neurotypical individuals. A narrow dynamic range was associated with increased autism-related traits in individuals who reported greater sensory hypersensitivity. In contrast, in individuals less prone to sensory hypersensitivity, a narrow dynamic range was associated with reduced autism-related traits. Findings highlight the potential importance of considering dynamic psychophysical metrics in future studies. En ligne : http://dx.doi.org/10.1007/s10803-019-04043-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=403

Spatial localisation in autism: evidence for differences in early cortical visual processing / Keziah LATHAM in Molecular Autism, (February 2013)  

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