A plain-language reference on autism

Autism spectrum disorder (ASD) is a lifelong neurodevelopmental condition characterized by differences in social communication and restricted or repetitive behaviors, with wide variation in how individuals experience and adapt to these traits.

Explains the spectrum concept in autism, covering heterogeneity, support needs, DSM-5 levels, and the limitations of functioning labels.

Explores the core features of autism—social-communication differences, repetitive behaviors, special interests, and sensory sensitivities—with attention to age- and gender-related variations in presentation.

Explains the multidisciplinary process of autism diagnosis, including screening tools, assessment methods, diagnostic criteria, and challenges like waitlists and adult diagnosis.

Current estimates suggest autism affects ~1 in 36 children in the U.S., with rising prevalence linked to broader diagnostic criteria, improved awareness, and better screening—not a true epidemic.

Autism spectrum disorder (ASD) arises primarily from genetic factors, including high heritability, polygenic contributions, and de novo mutations, with some environmental interactions—vaccines do not cause autism.

Explores sensory hyper- and hypo-sensitivity, seeking/avoiding behaviors, sensory overload, and practical accommodations for autistic individuals.

Explores the diverse communication profiles in autism, including spoken language, echolalia, AAC, and the importance of respecting all forms of communication.

Masking or camouflaging refers to strategies autistic individuals use to hide their traits, often leading to delayed diagnosis and mental health costs.

Explores key challenges and supports for autistic adults in employment, healthcare, relationships, and independent living, with attention to systemic gaps in services after youth supports end.

An evidence-based overview of developmental, behavioral, and therapeutic supports for autistic individuals, emphasizing autonomy, wellbeing, and individualized approaches.

Explores the neurodiversity paradigm, disability models, language preferences, and how identity framing impacts autistic wellbeing.

ADHD and autism frequently co-occur (AuDHD), with overlapping traits in attention, executive function, and sensory processing, but distinct social-communication profiles. Combined management requires tailored approaches.

Anxiety disorders are among the most common co-occurring conditions in autistic individuals, with distinct triggers like uncertainty and sensory overload, often requiring adapted therapeutic approaches.

Depression is a common co-occurring condition in autistic individuals, with elevated rates linked to social challenges, masking, and isolation. Adapted mental health support is often needed due to atypical presentations.

Epilepsy co-occurs frequently with autism, particularly in individuals with intellectual disability, with shared neurobiological mechanisms and bimodal onset peaks in early childhood and adolescence.

Gastrointestinal (GI) issues like constipation, diarrhea, and reflux are common in autistic individuals and may present as behavioral changes in non-speaking people. Emerging research explores gut-brain connections, but evidence-based management remains key.

Sleep disturbances—including insomnia, delayed sleep onset, and fragmented sleep—affect up to 80% of autistic individuals, with potential links to melatonin dysregulation, circadian rhythm differences, and sensory processing. Management includes behavioral strategies and, in some cases, medical interventions like melatonin supplementation.

Explores the overlap between autism and intellectual disability (ID), including prevalence, diagnostic distinctions, and the importance of tailored support that recognizes individual capabilities.

Obsessive-compulsive disorder (OCD) commonly co-occurs with autism, presenting diagnostic challenges due to overlapping repetitive behaviors. Management often requires adaptations to standard OCD therapies.

Many autistic individuals experience motor coordination challenges, including dyspraxia (developmental coordination disorder), affecting daily tasks, handwriting, and movement. Occupational therapy and tailored supports can help.

PDA is a proposed autism profile marked by extreme demand avoidance driven by anxiety, requiring low-demand support strategies due to the ineffectiveness of traditional behavioral approaches.

Autistic individuals often experience significant eating differences, including avoidant/restrictive food intake disorder (ARFID), characterized by sensory-driven food selectivity, nutritional risks, and links to anxiety. Supportive, non-coercive approaches are essential for management.

Emerging research suggests a link between autism, joint hypermobility, and hypermobile Ehlers-Danlos syndrome (hEDS), with implications for pain, fatigue, and dysautonomia management.

Tics and Tourette syndrome (TS) co-occur with autism at higher rates than in the general population, with overlapping neurodevelopmental roots. Distinguishing tics from stimming or compulsions is key for accurate support.