Testing for autism in adults involves in-depth clinical interviews about your developmental history, social experiences, and behaviors, using standardized tools like ADOS-2 or ADI-R, often with input from family members who knew you as a child, and may include psychological assessments, to understand patterns of social communication and restricted interests, as there's no single blood test. A team including psychologists, psychiatrists, or speech pathologists gathers detailed history and observes you to form a comprehensive picture.
Signs of autism in adults
The gold standard is to obtain a diagnosis from a psychologist, psychiatrist or similar trained clinician who specializes in ASD, but you may want to start by making an appointment with your primary care physician.
High functioning autism, often referred to as Level 1 Autism Spectrum Disorder, involves individuals who have milder symptoms and require less support than those with more severe autism. Adults with high functioning autism typically have strong language skills and average or above-average intelligence.
Restricted, repetitive patterns of behavior, interests, or activities: Individuals with mild autism may engage in repetitive behaviors or have intense, narrow interests. They may also display inflexible adherence to routines or have repetitive motor movements, such as hand-flapping or rocking.
Around 90% of autism cases are attributed to genetic factors, meaning autism is highly heritable, with many different genes contributing, rather than a single cause, often interacting with environmental influences during early brain development, though specific environmental factors don't cause it but can increase risk. Twin studies show strong genetic links, with concordance rates between 60-90% in identical twins, and research points to complex interactions of many genes and prenatal/perinatal factors.
The "6-second rule" for autism is a communication strategy where a speaker pauses for about six seconds after asking a question or giving information, giving the autistic person extra time to process it without feeling rushed, which helps reduce anxiety and allows for a more thoughtful response, reducing frustration for both parties. Instead of repeating or rephrasing, which can be confusing, you wait, and if needed, repeat the exact same words after the pause.
Autistic adults, especially those without an official diagnosis, may have communication difficulties, especially with eye contact and body language. Some may not like to look others in the eye for too long. In contrast, other people may want to look into the eyes of the people around them constantly.
Physical Symptoms:
Having an autism assessment can help people understand themselves better. An autism diagnosis can provide a person with clarity and access to support.
Stimming can also involve the visual, auditory (hearing) and olfactory (sense of smell) systems – for example:
There is not just one cause of ASD. Many different factors have been identified that may make a child more likely to have ASD, including environmental, biologic, and genetic factors.
Seven key signs of autism spectrum disorder (ASD) often involve challenges with social communication (like avoiding eye contact, not responding to names), restricted/repetitive behaviors (like repetitive movements or strict routines), sensory sensitivities (unusual reactions to sounds, lights, textures), and difficulties with emotional understanding or verbal expression, though signs vary greatly and appear differently across ages. Key indicators include limited gestures, delayed speech, intense focus on specific objects, difficulty with pretend play, and strong distress when routines change.
However, there are a few differences. People with ADHD can typically have reciprocal conversations and interactions with others, while autistic individuals may struggle to articulate their thoughts and feelings or make eye contact during a social interaction.
changing speech or tone of voice, for example by using less direct phrasing, or being more or less animated. suppressing, reducing or hiding stimming (such as hand flapping or echolalia), or switching to less noticeable stims such as playing with a pen.
5 common signs of autism in adults
Top 10 Calming Strategies for Autism
M-CHAT-R. The Modified Checklist for Autism in Toddlers, Revised (M-CHAT-R) is a screening tool that will ask a series of 20 questions about your child's behavior. It's intended for toddlers between 16 and 30 months of age. The results will let you know if a further evaluation may be needed.
Chinning is a form of repetitive self-stimulatory behavior (stimming) that you may notice in children or adults with autism. It involves pressing, rubbing, or holding the chin against objects, surfaces, or even hands to gain sensory input or comfort.
Children with autism may exhibit rigidity, inflexibility and certain types of repetitive behavior such as: Insistence on following a specific routine. Having difficulty accepting changes in the schedule. A strong preoccupation with a particular interest.
"Looping" in autism refers to getting "stuck" in repetitive mental cycles, replaying thoughts, questions, worries, or phrases endlessly, often triggered by stress, sensory overload, or uncertainty, and linked to challenges with executive function and attention. It's a non-clinical term for perseveration or rumination, where an autistic individual's brain struggles to shift focus from an internal loop, which can be mentally exhausting but sometimes also comforting.
Additionally, inherited genetic variations contribute greatly. Research shows that both mothers and fathers can carry autism-related gene variants. Some of these are common variants that increase the risk of autism, while others are rare mutations causing more severe effects.
Changes in the diagnostic criteria and increased screening at wellness visits seem to be the main contributors.
Understanding the 6 stages of an autism meltdown can help parents, caregivers, and educators respond with empathy and support.