1. Berman JI, Bloy L, Blaskey L, Jackel CR, Miller JS, Ross J, Edgar JC, Roberts TPL. Contributions to auditory system conduction velocity: insights with multi-modal neuroimaging and machine learning in children with ASD and XYY syndrome. Frontiers in psychiatry. 2023; 14: 1057221.

INTRODUCTION: The M50 electrophysiological auditory evoked response time can be measured at the superior temporal gyrus with magnetoencephalography (MEG) and its latency is related to the conduction velocity of auditory input passing from ear to auditory cortex. In children with autism spectrum disorder (ASD) and certain genetic disorders such as XYY syndrome, the auditory M50 latency has been observed to be elongated (slowed). METHODS: The goal of this study is to use neuroimaging (diffusion MR and GABA MRS) measures to predict auditory conduction velocity in typically developing (TD) children and children with autism ASD and XYY syndrome. RESULTS: Non-linear TD support vector regression modeling methods accounted for considerably more M50 latency variance than linear models, likely due to the non-linear dependence on neuroimaging factors such as GABA MRS. While SVR models accounted for ~80% of the M50 latency variance in TD and the genetically homogenous XYY syndrome, a similar approach only accounted for ~20% of the M50 latency variance in ASD, implicating the insufficiency of diffusion MR, GABA MRS, and age factors alone. Biologically based stratification of ASD was performed by assessing the conformance of the ASD population to the TD SVR model and identifying a sub-population of children with unexpectedly long M50 latency. DISCUSSION: Multimodal integration of neuroimaging data can help build a mechanistic understanding of brain connectivity. The unexplained M50 latency variance in ASD motivates future hypothesis generation and testing of other contributing biological factors.

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2. Cremone-Caira A, Braverman Y, MacNaughton GA, Nikolaeva JI, Faja S. Reduced Visual Evoked Potential Amplitude in Autistic Children with Co-Occurring Features of Attention-Deficit/Hyperactivity Disorder. Journal of autism and developmental disorders. 2023.

Provided the significant overlap in features of autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD), there is a critical need to identify transdiagnostic markers that could meaningfully stratify subgroups. The objective of this study was to compare the visual evoked potential (VEP) between 30 autistic children, 17 autistic children with co-occurring ADHD presentation (ASD + ADHD), and 21 neurotypical children (NTC). Electroencephalography was recorded while children passively viewed a pattern-reversal stimulus. Mean amplitude of the P1 event-related potential was extracted from a midline occipital channel and compared between groups. P1 mean amplitude was reduced in the ASD + ADHD group compared to the ASD and NTC groups, indicating a distinct pattern of brain activity in autistic children with co-occurring ADHD features.

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3. Danyluk A, Jacob R. Hearing Loss Diagnosis and Management in Adults with Intellectual and Developmental Disabilities. Advances in medicine. 2023; 2023: 6825476.

Hearing loss is a common concern in patients with intellectual and developmental disabilities (IDD), and early detection and intervention are crucial to prevent negative impacts on communication, cognition, socialization, safety, and mental health. Despite a lack of the literature specifically focused on hearing loss in adults with IDD, there is a substantial body of research demonstrating the prevalence of hearing loss in this population. This literature review examines the diagnosis and management of hearing loss in adult patients with IDD, with a focus on primary care considerations. Primary care providers must be aware of the unique needs and presentations of patients with IDD to ensure appropriate screening and treatment. This review highlights the importance of early detection and intervention, as well as the need for further research to guide clinical practice in this patient population.

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4. Dias CM, Issac B, Sun L, Lukowicz A, Talukdar M, Akula SK, Miller MB, Walsh K, Rockowitz S, Walsh CA. Glial dysregulation in the human brain in fragile X-associated tremor/ataxia syndrome. Proceedings of the National Academy of Sciences of the United States of America. 2023; 120(23): e2300052120.

Short trinucleotide expansions at the FMR1 locus are associated with the late-onset condition fragile X-associated tremor/ataxia syndrome (FXTAS), which shows very different clinical and pathological features from fragile X syndrome (associated with longer expansions), with no clear molecular explanation for these marked differences. One prevailing theory posits that the shorter, premutation expansion uniquely causes extreme neurotoxic increases in FMR1 mRNA (i.e., four to eightfold increases), but evidence to support this hypothesis is largely derived from analysis of peripheral blood. We applied single-nucleus RNA sequencing to postmortem frontal cortex and cerebellum from 7 individuals with premutation and matched controls (n = 6) to assess cell type-specific molecular neuropathology. We found only modest upregulation (~1.3-fold) of FMR1 in some glial populations associated with premutation expansions. In premutation cases, we also identified decreased astrocyte proportions in the cortex. Differential expression and gene ontology analysis demonstrated altered neuroregulatory roles of glia. Using network analyses, we identified cell type-specific and region-specific patterns of FMR1 protein target gene dysregulation unique to premutation cases, with notable network dysregulation in the cortical oligodendrocyte lineage. We used pseudotime trajectory analysis to determine how oligodendrocyte development was altered and identified differences in early gene expression in oligodendrocyte trajectories in premutation cases specifically, implicating early cortical glial developmental perturbations. These findings challenge dogma regarding extremely elevated FMR1 increases in FXTAS and implicate glial dysregulation as a critical facet of premutation pathophysiology, representing potential unique therapeutic targets directly derived from the human condition.

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5. Godel M, Robain F, Journal F, Kojovic N, Latrèche K, Dehaene-Lambertz G, Schaer M. Prosodic signatures of ASD severity and developmental delay in preschoolers. NPJ digital medicine. 2023; 6(1): 99.

Atypical prosody in speech production is a core feature of Autism Spectrum Disorder (ASD) that can impact everyday life communication. Because the ability to modulate prosody develops around the age of speech acquisition, it might be affected by ASD symptoms and developmental delays that emerge at the same period. Here, we investigated the existence of a prosodic signature of developmental level and ASD symptom severity in a sample of 74 autistic preschoolers. We first developed an original diarization pipeline to extract preschoolers’ vocalizations from recordings of naturalistic social interactions. Using this novel approach, we then found a robust voice quality signature of ASD developmental difficulties in preschoolers. Furthermore, some prosodic measures were associated with one year later outcome in participants who had not acquired speech yet. Altogether, our results highlight the potential benefits of automatized diarization algorithms and prosodic metrics for digital phenotyping in psychiatry, helping clinicians establish early diagnosis and prognosis.

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6. Hladik L, St John B, Carbery M, Gray M, Drew JR, Jr., Ausderau KK. Benefits and Challenges of a Telehealth Eating and Mealtime Intervention for Autistic Children: Occupational Therapy Practitioners’ Perspectives. OTJR : occupation, participation and health. 2023: 15394492231175069.

Eating and mealtime challenges are common in autistic children, yet intervention access is limited. Telehealth may provide opportunities to address this gap and increase access for underserved families. This study examined the occupational therapy practitioner’s perceptions of transitioning from a caregiver-mediated, in-home eating, and mealtime intervention for autistic children to telehealth owing to COVID-19 while considering the impact on accessibility, challenges, and benefits. Family characteristics were compared between groups. Thematic analysis of semi-structured interviews explored practitioners’ experiences of telehealth. Statistical findings and themes were directly compared and contrasted. The following three themes emerged: Intervention Adaptations, Challenges for Interventionists, and Benefits of Telehealth. The differences in the families’ geographic location were identified. Themes and family characteristic differences supported increased intervention accessibility for the telehealth group. This study provides preliminary evidence that telehealth can increase access to specialized services. There are benefits and challenges to implementing telehealth with families and autistic children.

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7. Johnson J, Dodds RL, Wood J. Experiences of Autistic College Students in Higher Education and Their Relations with Faculty. Journal of autism and developmental disorders. 2023.

PURPOSE: The purpose of this study was to investigate the various factors that may contribute to the academic self-concept of autistic college students, including the potential influence of academic success. METHODS: A sample of autistic participants (n = 12) were interviewed regarding autistic college students’ experiences. Transcripts were analyzed using a modified grounded theory approach. RESULTS: Most students had a positive academic self-concept due to factors like major selection based on passion and interest, following family values, personal motivation to do well, proving someone wrong, and striving for high academic achievement. Although accommodations were not the main focus of the study, they were found to affect student academic self-concept as well. CONCLUSION: Post-secondary institutions should consider incorporating intervention and support programs that assist in improving neurodiverse students’ self motivation and self regulation skills to encourage these students to be academically successful while maintaining their well-being. They should also provide professional development initiatives aimed at enhancing the capacity of faculty and staff to address the unique needs of autistic students and ensure the successful implementation of accommodations. This approach will contribute to a more inclusive and supportive learning environment for autistic college students, promoting their academic success and well-being.

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8. Maun R, Fabri M, Trevorrow P. Participatory Methods to Engage Autistic People in the Design of Digital Technology: A Systematic Literature Review. Journal of autism and developmental disorders. 2023.

PURPOSE: Many technology designers strive to involve end users in the design process, aiming to produce better outcomes. However, designers may struggle to engage autistic users effectively due to a lack of understanding of autistic characteristics and preferences. This systematic literature review aimed to identify how autistic adolescents and adults can best be engaged in effective participatory design activities. METHODS: Seven databases were searched for articles reporting technology design involving autistic people, returning 276 results. Using the PRISMA approach, 258 were excluded due to not meeting the inclusion criteria. The remaining 18 articles were then quality assessed. RESULTS: A thematic analysis revealed five core themes: (1) Engagement: the importance of investment in, and ownership of, the design process to create engagement, (2) Relationships: building relationships through collaboration and careful facilitation, (3) Skills development: the development of personal skills such as teamwork, design and self-advocacy in order to grow confidence, (4) Structure: providing context and structure to make the design experience feel safe and predictable, and (5) Support: the importance of support and consideration of individual needs as well as discouraging negative behaviours. CONCLUSION: Valuing participants as equal partners in design emerged as an, arguably, universal principle. The specific needs and preferences of autistic people must be understood and respected by designers. This goes beyond obvious accommodations such as providing a quiet and safe environment, and requires a deeper, more personal engagement with the individuals and their interests. We provide tangible recommendations for increasing engagement and aiding the design process.

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9. McLay L, Emerson LM, Waddington H, van Deurs J, Hunter J, Blampied N, Hapuku A, Macfarlane S, Bowden N, van Noorden L, Rispoli M. Telehealth-delivered naturalistic developmental behavioural intervention with and without caregiver acceptance and commitment therapy for autistic children and their caregivers: protocol for a multi-arm parallel group randomised clinical trial. BMJ open. 2023; 13(5): e071235.

INTRODUCTION: Timely access to early support that optimises autistic children’s development and their caregiver’s mental health is critical. Naturalistic developmental behavioural interventions (NDBIs) and acceptance and commitment therapy (ACT) are evidence-based supports that can enhance child learning and behaviour, and adult well-being, respectively. The traditional face-to-face delivery of these approaches is resource intensive. Further, little is known about the benefit of parallel child-focused and caregiver-focused supports. The aims of this trial are to evaluate the effectiveness and social validity of telehealth-delivered, caregiver-implemented, child-focused NDBI and caregiver-focused ACT when delivered alone and in parallel, on autistic children’s social communication and caregiver well-being. METHODS AND ANALYSIS: The study will use a randomised, single-blind clinical trial with three parallel arms: NDBI; ACT and ACT+NDBI. We will recruit a minimum of 78, 2-5-year-old autistic children and their families throughout Aotearoa New Zealand. Support will be delivered over 13 weeks using a combination of culturally enhanced web-based modules and online group coaching. Primary outcome variables include children’s social communication/engagement with their caregiver as well as caregiver stress and will be evaluated using a repeated measures multivariate analysis of variance. Outcome variables are assessed at baseline (before randomisation), immediately postparticipation and at 3-month follow-up. ETHICS AND DISSEMINATION: The trial is approved by the Health and Disability Ethics Committee (2022 FULL 12058). The findings of this trial will be disseminated through peer-reviewed journals and national and international conference proceedings regardless of the magnitude/direction of effect. Additionally, data will be shared with stakeholder groups, service providers and health professionals. TRIAL REGISTRATION NUMBER: Australian New Zealand Clinical Trials Registry (ACTRN12622001134718).

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10. Mendez-Vazquez H, Roach RL, Nip K, Chanda S, Sathler MF, Garver T, Danzman RA, Moseley MC, Roberts JP, Koch ON, Steger AA, Lee R, Arikkath J, Kim S. The autism-associated loss of δ-catenin functions disrupts social behavior. Proceedings of the National Academy of Sciences of the United States of America. 2023; 120(22): e2300773120.

δ-catenin is expressed in excitatory synapses and functions as an anchor for the glutamatergic AMPA receptor (AMPAR) GluA2 subunit in the postsynaptic density. The glycine 34 to serine (G34S) mutation in the δ-catenin gene has been found in autism spectrum disorder (ASD) patients and results in loss of δ-catenin functions at excitatory synapses, which is presumed to underlie ASD pathogenesis in humans. However, how the G34S mutation causes loss of δ-catenin functions to induce ASD remains unclear. Here, using neuroblastoma cells, we identify that the G34S mutation increases glycogen synthase kinase 3β (GSK3β)-dependent δ-catenin degradation to reduce δ-catenin levels, which likely contributes to the loss of δ-catenin functions. Synaptic δ-catenin and GluA2 levels in the cortex are significantly decreased in mice harboring the δ-catenin G34S mutation. The G34S mutation increases glutamatergic activity in cortical excitatory neurons while it is decreased in inhibitory interneurons, indicating changes in cellular excitation and inhibition. δ-catenin G34S mutant mice also exhibit social dysfunction, a common feature of ASD. Most importantly, pharmacological inhibition of GSK3β activity reverses the G34S-induced loss of δ-catenin function effects in cells and mice. Finally, using δ-catenin knockout mice, we confirm that δ-catenin is required for GSK3β inhibition-induced restoration of normal social behavior in δ-catenin G34S mutant animals. Taken together, we reveal that the loss of δ-catenin functions arising from the ASD-associated G34S mutation induces social dysfunction via alterations in glutamatergic activity and that GSK3β inhibition can reverse δ-catenin G34S-induced synaptic and behavioral deficits.

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11. Murphy GH, Sinclair N, Melvin C, Langdon PE. Group CBT for men with intellectual disabilities and/or autism who have harmful sexual behaviour. The British journal of clinical psychology. 2023.

OBJECTIVES: Men with intellectual disabilities and/or autism sometimes engage in harmful sexual behaviour (HSB), but it may be harder for them to access treatment, than it is for non-disabled men. The aim of this study was to evaluate the effect of attending an adapted CBT group, known as SOTSEC-ID, on men with intellectual disabilities and/or autism who had HSB. METHOD: Ninety-eight men from intellectual disability services, who had ID and/or autism and a history of HSB were recruited, and they received group CBT for a year (46 of these men have been previously reported). Harmful sexual behaviour, sexual knowledge, distorted cognitions and victim empathy were measured before and after treatment, and at 6 month follow-up. RESULTS: There were low levels of further harmful sexual behaviour: 12% of men engaged in further HSB during the 1-year period of the group, and 8% engaged in further HSB in the 6-month follow-up period. There were also significant improvements in sexual knowledge, distorted cognitions and victim empathy following treatment, maintained at 6-month follow-up. Men with autism showed significantly more non-contact HSB, were less likely to have been interviewed by police and had higher rates of further HSB, compared to men without autism. CONCLUSIONS: It is concluded that SOTSEC-ID is a promising treatment for men with ID/autism and HSB. Nevertheless, the study had a number of limitations and lacked a control group, so there is now an urgent need for a proper controlled study.

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12. Sahyoun C, Krauss B, Bevacqua M, Antonsen A, Jardinier L, Barbi E. Safety and Efficacy Associated With a Family-Centered Procedural Sedation Protocol for Children With Autism Spectrum Disorder or Developmental Delay. JAMA network open. 2023; 6(5): e2315974.

This case series describes a family-centered procedural sedation protocol including home desensitization to intranasal drug delivery, environmental modification, and intranasal dexmedetomidine combined with nitrous oxide for children with autism spectrum disorder or developmental delay. eng.

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13. Shah A, Varma M, Bhandari R. Exploring sulforaphane as neurotherapeutic: targeting Nrf2-Keap & Nf-Kb pathway crosstalk in ASD. Metabolic brain disease. 2023.

Autism spectrum disorders (ASD) are a family of complex neurodevelopmental disorders, characterized mainly through deficits in social behavior and communication. While the causes giving rise to autistic symptoms are numerous and varied, the treatment options and therapeutic avenues are still severely limited. Nevertheless, a number of signalling pathways have been implicated in the pathogenesis of the disease, and targeting these pathways might provide insight into potential treatments and future strategies. Importantly, alterations in inflammation, oxidative stress, and mitochondrial dysfunction have been noted in the brains of ASD patients, and among the pathways involved in these processes is the Nrf2 cascade. This particular pathway has been hypothesized to be involved in inducing both, inflammatory and anti-inflammatory/neuroprotective effects in the brain, sparking an interest in its use in ASD. Sulforaphane, a sulfur-containing phytochemical present mainly in cruciferous plants like broccoli and cabbage, has shown efficacy in activating the Nrf2 signaling pathway, which in turn brings about a protective effect on neuronal cells, especially against mitochondrial dysfunction. Its efficacy against ASD has not yet been evaluated, and in this paper, we attempt to discuss the therapeutic potential of this agent in the therapy of autism, with special emphasis on the role of the Nrf2 pathway in the disorder.

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14. Vien TN, Ta MC, Kimura LF, Onay T, DeCaen PG. Primary cilia TRP channel regulates hippocampal excitability. Proceedings of the National Academy of Sciences of the United States of America. 2023; 120(22): e2219686120.

Polycystins (PKD2, PKD2L1, and PKD2L2) are members of the transient receptor potential family, which form ciliary ion channels. Most notably, PKD2 dysregulation in the kidney nephron cilia is associated with polycystic kidney disease, but the function of PKD2L1 in neurons is undefined. In this report, we develop animal models to track the expression and subcellular localization of PKD2L1 in the brain. We discover that PKD2L1 localizes and functions as a Ca(2+) channel in the primary cilia of hippocampal neurons that apically radiate from the soma. Loss of PKD2L1 expression ablates primary ciliary maturation and attenuates neuronal high-frequency excitability, which precipitates seizure susceptibility and autism spectrum disorder-like behavior in mice. The disproportionate impairment of interneuron excitability suggests that circuit disinhibition underlies the neurophenotypic features of these mice. Our results identify PKD2L1 channels as regulators of hippocampal excitability and the neuronal primary cilia as organelle mediators of brain electrical signaling.

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15. Yamada R, Fujii T, Hattori K, Hori H, Matsumura R, Kurashimo T, Ishihara N, Yoshida S, Sumiyoshi T, Kunugi H. Discrepancy between Clinician-rated and Self-reported Depression Severity is Associated with Adverse Childhood Experience, Autistic-like Traits, and Coping Styles in Mood Disorders. Clinical psychopharmacology and neuroscience : the official scientific journal of the Korean College of Neuropsychopharmacology. 2023; 21(2): 296-303.

OBJECTIVE: This study aimed to determine if the discrepancy between depression severity rated by clinicians and that reported by patients depends on key behavioral/psychological features in patients with mood disorders. METHODS: Participants included 100 patients with mood disorders. First, we examined correlations and regressions between scores on the Hamilton Depression Rating Scale (HAMD) and Beck Depression Inventory (BDI). Second, we divided the participants into those who provided 1) greater ratings for the BDI compared with the HAMD (BDI relative- overrating, BO) group, 2) comparable ratings for the BDI and HAMD (BDI relatively concordant, BC) group, or 3) less ratings for the BDI (BDI relative-underrating, BU) group. Adverse childhood experiences, autistic-like traits, and coping styles were evaluated with a six-item short version of the Childhood Trauma Questionnaire (CTQ-6), the Social Responsiveness Scale for Adults (SRS-A), and the Ways of Coping Checklist (WCCL), respectively. RESULTS: A significant correlation was found between HAMD and BDI scores. Total and emotional abuse subscale scores from the CTQ-6, and the self-blame subscale scores from the WCCL were significantly higher for the BO group compared with the BU group. The BO group also elicited significantly higher SRS-A total scores than did the other groups. CONCLUSION: These findings suggest that patients with adverse emotional experiences, autistic-like traits, and self-blame coping styles perceive greater distress than that evaluated objectively by clinicians. The results indicate the need for inclusion of subjective assessments to effectively evaluate depressive symptoms in patients deemed to have these psycho- behavioral concerns.

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16. Yu Y, Ozonoff S, Miller M. Assessment of Autism Spectrum Disorder. Assessment. 2023: 10731911231173089.

Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by challenges in social interaction and communication and the presence of restricted interests and repetitive behaviors. The importance of early detection of ASD and subsequent early intervention is well documented. Efforts have been made over the years to clarify ASD diagnostic criteria and develop predictive, accurate screening tools and evidence-based, standardized diagnostic instruments to aid in the identification of ASD. In this article, we review the most recent changes in ASD diagnostic criteria in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision, summarize evidence-based instruments for ASD screening and diagnostic evaluations as well as the assessment of co-occurring conditions in ASD, the impact of COVID-19 on ASD assessment, and directions for future research in the field of ASD assessment.

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17. Yuan B, Luo L, Hu C, Lin F, Yang T, Chen J, Li T. Retinoic acid supplementation ameliorates motor incoordination via RARα-CBLN2 in the cerebellum of a prenatal valproic acid-exposed rat autism model. Neuroscience letters. 2023: 137316.

In addition to their core symptoms, most individuals with autism spectrum disorders (ASD) also experience motor impairments. These impairments are often linked to the cerebellum, which is the focus of the current study. Herein, we utilized a prenatal valproic acid (VPA)-induced rat model of autism and performed RNA sequencing in the cerebellum. Relative to control animals, the VPA-treated rats demonstrated both abnormal motor coordination and impaired dendritic arborization of Purkinje cells (PCs). Concurrently, we observed a decrease in the cerebellar expression of retinoic acid (RA) synthesis enzymes (RDH10, ALDH1A1), metabolic enzyme (CYP26A2), and lower levels of RA, retinoic acid receptor α (RARα), and Cerebellin2 (CBLN2) in the VPA-treated rats. However, RA supplementation ameliorated these deficits, restoring motor coordination, normalizing PCs dendritic arborization, and increasing the expression of RA, RARα, and CBLN2. Further, ChIP assays confirmed that RA supplementation enhanced RARα’s binding capacity to CBLN2 promoters. Collectively, these findings highlight the therapeutic potential of RA for treating motor incoordination in VPA-induced ASD, acting through the RARα-CBLN2 pathway.

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18. Zhang M, Wu Y, Lu Z, Song M, Huang X, Mi L, Yang J, Cui X. Effects of Vitamin D Supplementation on Children with Autism Spectrum Disorder: A Systematic Review and Meta-analysis. Clinical psychopharmacology and neuroscience : the official scientific journal of the Korean College of Neuropsychopharmacology. 2023; 21(2): 240-51.

The effect of vitamin D supplementation on individuals with autism spectrum disorder (ASD) is inconclusive. We aimed to conduct a meta-analysis of the available randomized controlled trials (RCTs) to explore whether vitamin D supplementation can improve core symptoms and coexisting conditions in children with ASD. Data were obtained by searching the PubMed, Embase, Web of Science, CINAHL and Cochrane Library databases up to February 2022 following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Using a random-effects model, mean differences with 95% confidence intervals (CIs) were calculated through a meta-analysis. There were eight RCTs with 266 children with ASD in the present review, among which six RCTs were included in the meta-analysis. Children who received vitamin D supplementation showed a significant improvement in stereotypical behavior scores (pooled mean difference (MD): -1.39; 95% CI: -2.7, -0.07; P = 0.04) with low heterogeneity (I(2) = 34%), and there was a trend toward decreased total scores on the Social Responsiveness Scale (SRS) and Childhood Autism Rating Scale (CARS, P = 0.05); however, there were no other significant differences in the core symptoms of ASD and coexisting conditions between groups as measured by the Aberrant Behavior Checklist (ABC). Vitamin D supplementation appears to improve stereotypical behaviors but does not improve other core symptoms and coexisting conditions. Further randomized controlled trials with large sample sizes and individualized doses are needed.

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19. Zhang S, Li H, Li H, Zhao S. The effect of autistic traits on prosocial behavior: The chain mediating role of received social support and perceived social support. Autism : the international journal of research and practice. 2023: 13623613231177776.

Autistic traits are known to be associated with a set of core symptoms of autism spectrum disorder. The impact of autistic traits on prosocial behavior, including a consideration of the role of social support, has never been explored. We investigated whether and how social support mediates the autistic trait-prosocial behavior relationship. We found that autistic traits can influence prosocial behavior not only through received social support and perceived social support but also indirectly through the chain mediating effects of received social support and perceived social support. This study contributes to the understanding of how and to what extent prosocial behavior is influenced by autistic traits. Future work is required to further investigate the clinical autism spectrum disorder samples and cross-cultural applicability of the model found in this study.

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