How Can You Tell If Someone Has Autism?

Autism is a neurological disorder that affects a person’s social interaction, communication skills, and behavior. It can be difficult to determine if someone has autism, especially if they are high-functioning. Here are some signs to look for that may indicate someone has autism.

steven zauderer
Steven Zauderer
December 16, 2023
min read

Understanding Autism in Adults

To effectively detect signs of autism in adults, it is essential to have a clear understanding of Autism Spectrum Disorder (ASD) and its prevalence in the adult population.

What is Autism Spectrum Disorder (ASD)?

Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder characterized by difficulties in social communication and interaction, as well as the presence of restricted interests and repetitive behaviors. It is a lifelong condition that affects individuals across various domains of functioning.

People with ASD may have challenges in understanding and using verbal and nonverbal communication, such as maintaining eye contact, interpreting facial expressions, and engaging in reciprocal conversation. They may also exhibit repetitive behaviors, such as hand-flapping, rocking, or having intense and narrow interests.

ASD is a spectrum disorder, meaning it encompasses a wide range of abilities and characteristics. Some individuals with ASD may require significant support in their daily lives, while others may have higher levels of functioning and excel in specific areas.

Prevalence of Autism in Adults

While autism is commonly associated with childhood, it is important to recognize that it is a lifelong condition that persists into adulthood. However, many individuals may go undiagnosed until later in life. The prevalence of autism in adults varies, and accurate statistics can be challenging to obtain due to factors such as late diagnosis and underreporting.

According to research conducted by the Centers for Disease Control and Prevention (CDC), approximately 1 in 36 children are diagnosed with ASD in the United States. However, the prevalence of autism in adults may differ. It is believed that a significant number of adults with autism remain undiagnosed, often due to the challenges in recognizing symptoms in adulthood.

It is crucial to raise awareness about autism in adults and provide resources for diagnosis and support. Early detection and diagnosis can significantly impact an individual's quality of life by facilitating access to appropriate interventions and support services.

By understanding the nature of autism spectrum disorder and its prevalence in the adult population, we can better identify and support individuals who may be exhibiting signs of autism.

people sitting in front of computer monitors

Signs and Symptoms of Autism in Adults

Recognizing the signs and symptoms of autism in adults is crucial for early detection and appropriate support. Autism spectrum disorder (ASD) can manifest differently in adults compared to children, making it important to understand the specific indicators. In this section, we will explore three common areas of difficulty: social communication difficulties, repetitive behaviors and restricted interests, and sensory sensitivities.

Social Communication Difficulties

Adults with autism often experience challenges in social communication. They may struggle with nonverbal cues such as facial expressions, body language, and tone of voice. Difficulties in understanding and using gestures, sarcasm, or humor can also be observed. Individuals with autism may have difficulty initiating or sustaining conversations, exhibit a preference for solitary activities, or find it challenging to interpret the thoughts and feelings of others.

Some signs of social communication difficulties in adults with autism include:

  • Limited eye contact or avoiding eye contact altogether.
  • Difficulty understanding social norms and appropriate social boundaries.
  • Challenges in initiating or maintaining conversations.
  • A tendency towards literal interpretation of language.
  • Difficulty recognizing and responding to nonverbal cues.

Repetitive Behaviors and Restricted Interests

Repetitive behaviors and restricted interests are another hallmark feature of autism in adults. These behaviors can manifest in various ways, such as repetitive movements (e.g., hand flapping, rocking), adherence to strict routines and rituals, or intense preoccupation with specific subjects or objects. Adults with autism may display highly focused interests, often to the exclusion of other activities or topics.

Signs of repetitive behaviors and restricted interests in adults with autism may include:

  • Engaging in repetitive movements, such as hand or body rocking.
  • Insistence on sameness and resistance to changes in routines.
  • Collecting and organizing objects in specific patterns or arrangements.
  • Intense focus on a narrow range of interests, often with extensive knowledge in those areas.
  • Difficulty transitioning between activities or adapting to unexpected changes.

Sensory Sensitivities

Many adults with autism also experience sensory sensitivities, which can affect their perception of the environment. Sensory sensitivities can involve hypersensitivity (over-responsiveness) or hyposensitivity (under-responsiveness) to sensory stimuli such as noise, light, touch, taste, or smell. These sensitivities can vary from person to person, with some individuals being highly sensitive to certain stimuli while others may seek sensory input.

Signs of sensory sensitivities in adults with autism may include:

  • Overwhelm or discomfort in environments with bright lights, loud noises, or strong smells.
  • Heightened sensitivity to certain textures, fabrics, or clothing tags.
  • Preference for specific types of food due to taste or texture sensitivities.
  • Seeking out sensory input, such as rocking or spinning, to regulate sensory experiences.
  • Difficulty filtering out background noise and focusing on specific tasks.

Understanding these signs and symptoms can help individuals, their families, and healthcare professionals recognize and address the unique challenges faced by adults with autism. If you suspect that you or someone you know may have autism, seeking a professional evaluation is important for a comprehensive assessment and diagnosis.

Challenges in Diagnosing Autism in Adults

Diagnosing autism in adults can be challenging due to various factors. Late diagnosis, masking and camouflaging, and gender differences all contribute to the complexities of identifying autism in adults.

Late Diagnosis

One significant challenge in diagnosing autism in adults is the tendency for individuals to receive a diagnosis later in life. Many adults with autism spectrum disorder (ASD) may have gone undiagnosed during childhood, either due to a lack of awareness or milder symptoms that were not recognized as indicative of autism. As a result, these individuals may struggle with understanding their unique experiences and finding appropriate support. Late diagnosis can delay access to interventions and therapies that can greatly benefit adults with autism.

Masking and Camouflaging

Another challenge is the phenomenon known as masking or camouflaging. Masking refers to the conscious or unconscious effort to hide or suppress autistic traits in order to fit in and conform to societal expectations.

Many individuals with autism, particularly women and girls, have developed coping strategies to mask their difficulties in social situations. This can make it even more difficult to recognize the signs of autism in adults, as they may have become adept at masking their challenges, making it harder for others to notice their struggles.

Gender Differences

Gender differences also play a role in the challenges of diagnosing autism in adults. Autism has historically been diagnosed more frequently in males, leading to a gender bias in research and diagnostic criteria.

As a result, symptoms that may be more common in females on the autism spectrum, such as social mimicry and improved social camouflage, may be overlooked or misunderstood. It is important to note that autism can present differently in males and females, and understanding these gender differences is crucial to accurately identifying autism in adults.

Navigating the challenges in diagnosing autism in adults requires a comprehensive understanding of the unique experiences and characteristics of individuals on the autism spectrum. Professionals specializing in autism diagnosis, as well as self-assessment and reflection, can aid in the identification process. Various diagnostic tools and assessments are available to assess the presence of autism in adults.

Recognizing and addressing these challenges is an essential step toward ensuring that adults with autism receive the support and resources they need to thrive. By increasing awareness and understanding of the signs of autism in adults, we can work towards providing a more inclusive and supportive society for individuals on the autism spectrum.

Detecting Signs of Autism in Adults

Detecting signs of autism in adults can be a complex process, as symptoms can vary greatly from person to person. However, there are several methods that can help in identifying potential signs of autism in adults. These methods include self-assessment and reflection, seeking professional evaluation, and diagnostic tools and assessments.

Self-Assessment and Reflection

Self-assessment and reflection can be valuable tools for adults who suspect they may be on the autism spectrum. Taking the time to reflect on one's own behaviors, experiences, and challenges can provide important insights.

Some common signs and experiences that may indicate autism in adults include difficulties with social interactions, repetitive behaviors, and sensory sensitivities. It is important to remember that self-assessment alone cannot provide a definitive diagnosis but can serve as an initial step in understanding oneself better. If you suspect you or someone you know may be on the autism spectrum, seeking professional evaluation is recommended.

Seeking Professional Evaluation

Professional evaluation is a crucial step in accurately diagnosing autism in adults. A healthcare professional or a specialist with expertise in autism spectrum disorders (ASD) can conduct a comprehensive assessment.

This evaluation may involve interviews, questionnaires, and direct observations to gather information about an individual's developmental history, social interactions, communication patterns, and repetitive behaviors. It may also include assessments to evaluate cognitive abilities and adaptive functioning. Seeking professional evaluation provides a more thorough and objective assessment, helping to determine whether an individual meets the criteria for an autism diagnosis.

Diagnostic Tools and Assessments

Diagnostic tools and assessments play a significant role in detecting signs of autism in adults. These tools are designed to assess various aspects of autism, including social communication skills, repetitive behaviors, and sensory sensitivities.

They are typically administered by professionals and can provide valuable information to aid in the diagnostic process. Examples of commonly used diagnostic tools and assessments include the Autism Diagnostic Observation Schedule (ADOS), the Autism Diagnostic Interview-Revised (ADI-R), and the Social Communication Questionnaire (SCQ). These assessments help professionals gather standardized information to make an accurate diagnosis.

It's important to note that the diagnosis of autism in adults can be challenging due to various factors, such as masking and camouflaging behaviors. Additionally, the presentation of autism can differ between genders, and certain signs may be more prominent in one gender than the other.

If you suspect that you or someone you know may be on the autism spectrum, it is recommended to consult with a healthcare professional or a specialist in autism spectrum disorders. They can guide you through the evaluation process and provide the necessary support and resources.

Support and Resources for Adults with Autism

Finding appropriate support and resources is essential for adults with autism to thrive and lead fulfilling lives. While the specific needs and preferences may vary, there are several key areas to consider when seeking support. These include therapies and interventions, strategies for coping and thriving, and advocacy and community engagement.

Therapies and Interventions

Therapies and interventions can play a crucial role in supporting adults with autism. These interventions are designed to address specific challenges and improve overall well-being. Some commonly utilized therapies for adults with autism include:

Therapy Description
Applied Behavior Analysis (ABA) A structured approach that focuses on modifying behavior and developing new skills through positive reinforcement and systematic teaching methods.
Occupational Therapy (OT) Helps individuals develop skills for daily living, such as self-care, fine motor skills, and sensory integration.
Speech and Language Therapy Aims to improve communication skills, including speech, language comprehension, and social communication.
Cognitive Behavioral Therapy (CBT) Focuses on identifying and modifying negative thoughts and behaviors, helping individuals develop coping strategies and improve emotional well-being.

These therapies can be tailored to address specific needs and goals, promoting independence and enhancing overall quality of life. It's important to consult with professionals who specialize in working with adults with autism to determine the most appropriate interventions for individual circumstances.

Strategies for Coping and Thriving

Developing strategies for coping and thriving is essential for adults with autism. These strategies can help individuals navigate daily challenges and build upon their strengths. Some effective strategies include:

  • Developing routines and schedules to provide structure and predictability.
  • Utilizing visual supports, such as visual schedules or social stories, to enhance understanding and communication.
  • Practicing self-care techniques, including stress management and relaxation exercises.
  • Engaging in activities that align with personal interests and strengths.
  • Building a strong support network of family, friends, and professionals who understand and support the individual's needs.

By implementing these strategies, individuals with autism can enhance their overall well-being, manage stress, and maximize their potential.

Advocacy and Community Engagement

Advocacy and community engagement are vital components of support for adults with autism. Advocacy involves promoting awareness, acceptance, and inclusion of individuals with autism in society. It also entails ensuring access to appropriate services, accommodations, and opportunities.

Community engagement provides opportunities for individuals with autism to connect with others who share similar experiences and interests. This can include participating in support groups, joining social clubs or organizations, and engaging in community events. Building connections within the autism community creates a sense of belonging and provides a platform for sharing experiences, resources, and support.

Additionally, advocating for autism awareness and acceptance helps foster a more inclusive society that embraces neurodiversity. It's important to actively support and engage with organizations and initiatives that promote autism awareness, understanding, and acceptance.

Seeking out and utilizing the available resources, support networks, and engaging in advocacy efforts can greatly enhance the lives of adults with autism. By accessing appropriate therapies, implementing coping strategies, and actively participating in the community, individuals with autism can thrive and achieve their full potential.


How early can autism be diagnosed?

Autism can be diagnosed as early as 18 months, although some children may not receive a diagnosis until much later. Early diagnosis is important so that interventions and therapies can begin as soon as possible.

What assessments are used to diagnose autism?

There is no single test that can diagnose autism. A qualified healthcare provider or specialist will typically use a combination of assessments and evaluations to make a diagnosis. These may include developmental screenings, behavioral observations, and standardized tests.

Can adults be diagnosed with autism?

Yes, adults can be diagnosed with autism. Many people with high-functioning autism may not receive a diagnosis until adulthood, when they begin to experience difficulties in social or occupational settings.

Is there a cure for autism?

There is no cure for autism, but there are many interventions and therapies available that can help individuals with autism lead happy and fulfilling lives. These may include speech therapy, occupational therapy, and behavior therapy.

How do I find a qualified healthcare provider or specialist who can diagnose autism?

Your primary care physician or pediatrician may be able to refer you to a specialist who can diagnose autism. You can also contact your local Autism Society chapter for information on resources in your area.


Autism is a complex disorder that can be difficult to diagnose. It is important to be aware of the signs and symptoms of autism, and to seek a professional diagnosis if you suspect someone has the disorder. With early intervention and treatment, people with autism can learn to manage their symptoms and live fulfilling lives.


steven zauderer

CEO of CrossRiverTherapy - a national ABA therapy company based in the USA.

Table of Contents