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Autism Research: Official Journal of the International Society for Autism Research

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https://www.readbyqxmd.com/read/27910247/auditory-processing-in-noise-is-associated-with-complex-patterns-of-disrupted-functional-connectivity-in-autism-spectrum-disorder
#1
Fahimeh Mamashli, Sheraz Khan, Hari Bharadwaj, Konstantinos Michmizos, Santosh Ganesan, Keri-Lee A Garel, Javeria Ali Hashmi, Martha R Herbert, Matti Hämäläinen, Tal Kenet
Autism spectrum disorder (ASD) is associated with difficulty in processing speech in a noisy background, but the neural mechanisms that underlie this deficit have not been mapped. To address this question, we used magnetoencephalography to compare the cortical responses between ASD and typically developing (TD) individuals to a passive mismatch paradigm. We repeated the paradigm twice, once in a quiet background, and once in the presence of background noise. We focused on both the evoked mismatch field (MMF) response in temporal and frontal cortical locations, and functional connectivity with spectral specificity between those locations...
December 2, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27910235/the-impact-of-caregiver-mediated-jasper-on-child-restricted-and-repetitive-behaviors-and-caregiver-responses
#2
Clare Harrop, Amanda Gulsrud, Wendy Shih, Lilit Hovsepyan, Connie Kasari
Restricted and repetitive behaviors (RRBs) are a core feature of autism spectrum disorder (ASD). Compared to the social-communication impairments children show, we know less about why children engage in these repetitive actions and behaviors and how to help children (and their caregivers) with these behaviors. As a result, early intervention has typically focused on social-communication. In this study, we were interested in understanding how child RRBs changed following an intervention that targeted social-communication behaviors and if the training caregivers received changed how they responded to their child's RRBs...
December 2, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27910232/strategies-of-readers-with-autism-when-responding-to-inferential-questions-an-eye-movement-study
#3
Martina Micai, Holly Joseph, Mila Vulchanova, David Saldaña
Previous research suggests that individuals with autism spectrum disorder (ASD) have difficulties with inference generation in reading tasks. However, most previous studies have examined how well children understand a text after reading or have measured on-line reading behavior without response to questions. The aim of this study was to investigate the online strategies of children and adolescents with autism during reading and at the same time responding to a question by monitoring their eye movements. The reading behavior of participants with ASD was compared with that of age-, language-, nonverbal intelligence-, reading-, and receptive language skills-matched participants without ASD (control group)...
December 2, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27896947/reduced-modulation-of-thalamocortical-connectivity-during-exposure-to-sensory-stimuli-in-asd
#4
Shulamite A Green, Leanna Hernandez, Susan Y Bookheimer, Mirella Dapretto
Recent evidence for abnormal thalamic connectivity in autism spectrum disorders (ASD) and sensory processing disorders suggests the thalamus may play a role in sensory over-responsivity (SOR), an extreme negative response to sensory stimuli, which is common in ASD. However, there is yet little understanding of changes in thalamic connectivity during exposure to aversive sensory inputs in individuals with ASD. In particular, the pulvinar nucleus of the thalamus is implicated in atypical sensory processing given its role in selective attention, regulation, and sensory integration...
November 29, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27896942/mid-childhood-outcomes-of-infant-siblings-at-familial-high-risk-of-autism-spectrum-disorder
#5
Elizabeth Shephard, Bosiljka Milosavljevic, Greg Pasco, Emily J H Jones, Teodora Gliga, Francesca Happé, Mark H Johnson, Tony Charman
Almost one-in-five infants at high familial risk for autism spectrum disorder (ASD), due to having an older sibling with an ASD diagnosis, develop ASD themselves by age 3 years. Less is known about the longer-term outcomes of high-risk infants. To address this issue, we examined symptoms of ASD and associated developmental conditions (attention-deficit/hyperactivity disorder (ADHD); anxiety), language, IQ, and adaptive behaviour at age 7 years in high- and low-risk children studied from infancy. We compared outcomes between high-risk children who met criteria for ASD at age 7, high-risk children without ASD, and low-risk control children...
November 29, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27891820/investigating-diagnostic-bias-in-autism-spectrum-conditions-an-item-response-theory-analysis-of-sex-bias-in-the-aq-10
#6
Aja Louise Murray, Carrie Allison, Paula L Smith, Simon Baron-Cohen, Tom Booth, Bonnie Auyeung
Diagnostic bias is a concern in autism spectrum conditions (ASC) where prevalence and presentation differ by sex. To ensure that females with ASC are not under-identified, it is important that ASC screening tools do not systematically underestimate autistic traits in females relative to males. We evaluated whether the AQ-10, a brief screen for ASC recommended by the National Institute of Clinical Excellence in cases of suspected ASC, exhibits such a bias. Using an item response theory approach, we evaluated differential item functioning and differential test functioning...
November 28, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27891819/autism-and-emotional-face-viewing
#7
Jakob Åsberg Johnels, Daniel Hovey, Nicole Zürcher, Loyse Hippolyte, Eric Lemonnier, Christopher Gillberg, Nouchine Hadjikhani
Atypical patterns of face-scanning in individuals with autism spectrum disorder (ASD) may contribute to difficulties in social interactions, but there is little agreement regarding what exactly characterizes face-viewing in ASD. In addition, little research has examined how face-viewing is modulated by the emotional expression of the stimuli, in individuals with or without ASD. We used eye-tracking to explore viewing patterns during perception of dynamic emotional facial expressions in relatively large groups of individuals with (n = 57) and without ASD (n = 58) and examined diagnostic- and age-related effects, after subgrouping children and adolescents (≤18 years), on the one hand, and adults (>18 years), on the other...
November 28, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27874276/prenatal-toxoplasmosis-antibody-and-childhood-autism
#8
Marisa N Spann, Andre Sourander, Heljä-Marja Surcel, Susanna Hinkka-Yli-Salomäki, Alan S Brown
There is evidence that some maternal infections during the prenatal period are associated with neurodevelopmental disorders, such as childhood autism. However, the association between autism and Toxoplasma gondii (T. gondii), an intracellular parasite, remains unclear. The authors examined whether serologically confirmed maternal antibodies to T. gondii are associated with odds of childhood autism in offspring. The study is based on a nested case-control design of a large national birth cohort (N = 1.2 million) and the national psychiatric registries in Finland...
November 22, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27874275/executive-functioning-in-men-and-women-with-an-autism-spectrum-disorder
#9
Michelle Kiep, Annelies A Spek
Executive functioning (EF) is thought to be linked to autism spectrum disorders (ASD) specific symptoms. The majority of research has focused on children and adolescents with ASD and, therefore, little is known about EF in adults. Furthermore, little is known about gender differences. Ninety-nine men and forty women with ASD were compared with and 35 neurotypical men 25 neurotypical women. Participants were matched on age, total intelligence, and verbal ability. The following instruments were used to measure executive functioning: digit span and letter and number sequencing of the WAIS-III, Tower of Hanoi, WCST, and Verbal fluency...
November 22, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27874273/association-testing-of-vasopressin-receptor-1a-microsatellite-polymorphisms-in-non-clinical-autism-spectrum-phenotypes
#10
Tanya L Procyshyn, Peter L Hurd, Bernard J Crespi
Variation in the arginine vasopressin receptor 1a (AVPR1a) gene is associated with autism risk in clinical populations and with variation in social behavior in non-clinical populations. However, whether a relationship exists between AVPR1a polymorphisms and non-clinical manifestations of autism spectrum phenotypes has not been established. In this study, 873 Caucasian university students were administered the Autism-spectrum Quotient (AQ) questionnaire and genotyped for the RS1 and RS3 microsatellites. A significant association was found between RS3 microsatellite variation and AQ score, with the long/long RS3 genotype associated with higher AQ score...
November 22, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27874271/diagnostic-model-generated-by-mri-derived-brain-features-in-toddlers-with-autism-spectrum-disorder
#11
Xiang Xiao, Hui Fang, Jiansheng Wu, ChaoYong Xiao, Ting Xiao, Lu Qian, FengJing Liang, Zhou Xiao, Kang Kang Chu, Xiaoyan Ke
Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder with core symptoms of atypical social interaction, communication, and restricted, repetitive patterns of behavior, interests, and activities. Although the pathophysiologic mechanism of ASD is unclarified yet, the neuroanatomical features are considered as valuable predictors for discriminating ASD from others. But there has been relatively little scientific study about predictive power of different neuroanatomical features of early age ASD...
November 22, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27874266/meta-analysis-of-neuropsychological-measures-of-executive-functioning-in-children-and-adolescents-with-high-functioning-autism-spectrum-disorder
#12
Chun Lun Eric Lai, Zoe Lau, Simon S Y Lui, Eugenia Lok, Venus Tam, Quinney Chan, Koi Man Cheng, Siu Man Lam, Eric F C Cheung
Existing literature on the profile of executive dysfunction in autism spectrum disorder showed inconsistent results. Age, comorbid attention-deficit/hyperactivity disorder (ADHD) and cognitive abilities appeared to play a role in confounding the picture. Previous meta-analyses have focused on a few components of executive functions. This meta-analysis attempted to delineate the profile of deficit in several components of executive functioning in children and adolescents with high-functioning autism spectrum disorder (HFASD)...
November 22, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27874265/incidental-brain-mri-findings-in-an-autism-twin-study
#13
Julio C Monterrey, Jennifer Philips, Sue Cleveland, Serena Tanaka, Patrick Barnes, Joachim F Hallmayer, Alan L Reiss, Laura C Lazzeroni, Antonio Y Hardan
Brain magnetic resonance imaging (MRI) studies suggest the prevalence of asymptomatic "incidental" findings (IF) in autism spectrum disorder (ASD) is similar to that of neurotypically developing (NT) controls. However, given the causes of IF may include both genetic and environmental factors, a twin study would facilitate comparing brain IF between ASD and NT subjects. MRI scans were examined to assess the prevalence of brain IF in twin "case pairs" (at least one twin with diagnosis of ASD) and twin "control pairs" (NT)...
November 22, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27874263/ensemble-perception-of-color-in-autistic-adults
#14
John Maule, Kirstie Stanworth, Elizabeth Pellicano, Anna Franklin
Dominant accounts of visual processing in autism posit that autistic individuals have an enhanced access to details of scenes [e.g., weak central coherence] which is reflected in a general bias toward local processing. Furthermore, the attenuated priors account of autism predicts that the updating and use of summary representations is reduced in autism. Ensemble perception describes the extraction of global summary statistics of a visual feature from a heterogeneous set (e.g., of faces, sizes, colors), often in the absence of local item representation...
November 22, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27868365/the-salience-of-the-self-self-referential-processing-and-internalizing-problems-in-children-and-adolescents-with-autism-spectrum-disorder
#15
Catherine A Burrows, Lauren V Usher, Peter C Mundy, Heather A Henderson
Children and adolescents with autism spectrum disorder (ASD) demonstrate atypical processing of, and memory for, self-referenced information, which may contribute to the heightened rates of co-occurring internalizing problems. We assessed affective and cognitive aspects of self-referential processing in verbally-fluent children with ASD (N = 79), and an age-matched comparison sample (COM, N = 73) of children without an autism diagnosis. We examined group differences in these two aspects of the self-system, and their joint contributions to individual differnces in internalizing problems...
November 20, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27809408/gender-differences-in-autism-spectrum-disorders-divergence-among-specific-core-symptoms
#16
Anita Beggiato, Hugo Peyre, Anna Maruani, Isabelle Scheid, Maria Rastam, Frederique Amsellem, Carina I Gillberg, Marion Leboyer, Thomas Bourgeron, Christopher Gillberg, Richard Delorme
Community-based studies have consistently shown a sex ratio heavily skewed towards males in autism spectrum disorders (ASD). The factors underlying this predominance of males are largely unknown, but the way girls score on standardized categorical diagnostic tools might account for the underrecognition of ASD in girls. Despite the existence of different norms for boys and girls with ASD on several major screening tests, the algorithm of the Autism Diagnosis Interview-Revised (ADI-R) has not been reformulated...
November 3, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27809407/unique-effects-of-the-transporters-animated-series-and-of-parental-support-on-emotion-recognition-skills-of-children-with-asd-results-of-a-randomized-controlled-trial
#17
Tali Gev, Ruthie Rosenan, Ofer Golan
Emotion recognition (ER) and understanding deficits are characteristic of autism spectrum disorder (ASD). The Transporters (TT) animated series has shown promising results in teaching children with ASD to recognize emotions, with mixed findings about generalization and maintenance of effects. This study aimed to evaluate the unique role of TT and of parental support in the acquisition, generalization, and maintenance of acquired ER skills in children with ASD. 77 Israeli children with high functioning ASD, aged 4-7 were randomly assigned into four groups according to a 2 × 2 design of the factors Series (TT, control series) and Parental Support (with/without)...
November 3, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27770496/-frank-presentations-as-a-novel-research-construct-and-element-of-diagnostic-decision-making-in-autism-spectrum-disorder
#18
Ashley de Marchena, Judith Miller
Many individuals with ASD have a distinctive behavioral presentation that is recognizable within moments, a phenomenon we call "frank" ASD. This phenomenon has been discussed informally for decades, perhaps as "classic" ASD; however, there is no unitary "classic" presentation, and classic autism does not seem to correspond to level of functioning. Thus, neither "frank" nor "classic" autism has been delineated or studied as a research construct. To initiate the empirical study of frank ASD, we surveyed 151 clinicians, from a range of disciplines that diagnose ASD, about this phenomenon...
October 21, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27753278/research-needs-and-priorities-for-transition-and-employment-in-autism-considerations-reflected-in-a-special-interest-group-at-the-international-meeting-for-autism-research
#19
David B Nicholas, Sandra Hodgetts, Lonnie Zwaigenbaum, Leann E Smith, Paul Shattuck, Jeremy R Parr, Olivia Conlon, Tamara Germani, Wendy Mitchell, Lori Sacrey, Margot E Stothers
Research related to supports for adults with autism spectrum disorder (ASD) is under-developed. As an example, system and service development to support successful transition to adulthood and meaningful vocation for adults has received relatively little research scrutiny until recently, with practitioners and program developers lacking evidence-informed approaches guiding service delivery. A Special Interest Group (SIG) was convened at the International Meeting for Autism Research in May 2014 and May 2015, with a focus on transitional and vocational issues in ASD...
October 17, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27739260/stability-of-the-acoustic-startle-response-and-its-modulation-in-children-with-typical-development-and-those-with-autism-spectrum-disorders-a-one-year-follow-up
#20
Hidetoshi Takahashi, Takayuki Nakahachi, Andrew Stickley, Makoto Ishitobi, Yoko Kamio
Auditory hyper-reactivity is a common sensory-perceptual abnormality that interrupts behavioral adaptations in autism spectrum disorders (ASD). Recently, prolonged acoustic startle response (ASR) latency and hyper-reactivity to weak acoustic stimuli were reported in children with ASD. Indexes of ASR and its modulation are known to be stable biological markers for translational research in the adult population. However, little is known about the stability of these indexes in children. Thus, the objective of our study was to investigate the stability of neurophysiological ASR indexes in children with ASD and typical development (TD)...
October 14, 2016: Autism Research: Official Journal of the International Society for Autism Research
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