Signs and Symptoms of Autism Spectrum Disorder

Signs and Symptoms of Autism Spectrum Disorder

Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. People with ASD often have problems with social communication and interaction, and restricted or repetitive behaviors or interests. People with ASD may also have different ways of learning, moving, or paying attention. It is important to note that some people without ASD might also have some of these symptoms. But for people with ASD, these characteristics can make life very challenging.

Learn more about ASD

Social Communication and Interaction Skills

Social communication and interaction skills can be challenging for people with ASD.

Baby - Human Age, Waving - Gesture, Child, Happiness, Looking At Camera

Examples of social communication and social interaction characteristics related to ASD can include

  • Avoids or does not keep eye contact
  • Does not respond to name by 9 months of age
  • Does not show facial expressions like happy, sad, angry, and surprised by 9 months of age
  • Does not play simple interactive games like pat-a-cake by 12 months of age
  • Uses few or no gestures by 12 months of age (for example, does not wave goodbye)
  • Does not share interests with others by 15 months of age (for example, shows you an object that they like)
  • Does not point to show you something interesting by 18 months of age
  • Does not notice when others are hurt or upset by 24 months of age
  • Does not notice other children and join them in play by 36 months of age
  • Does not pretend to be something else, like a teacher or superhero, during play by 48 months of age
  • Does not sing, dance, or act for you by 60 months of age

Restricted or Repetitive Behaviors or Interests

People with ASD have behaviors or interests that can seem unusual. These behaviors or interests set ASD apart from conditions defined by problems with social communication and interaction only.

Examples of restricted or repetitive behaviors and interests related to ASD can include

Close-up of child playing with toy blocks on the carpet.
  • Lines up toys or other objects and gets upset when order is changed
  • Repeats words or phrases over and over (called echolalia)
  • Plays with toys the same way every time
  • Is focused on parts of objects (for example, wheels)
  • Gets upset by minor changes
  • Has obsessive interests
  • Must follow certain routines
  • Flaps hands, rocks body, or spins self in circles
  • Has unusual reactions to the way things sound, smell, taste, look, or feel

Other Characteristics

Most people with ASD have other related characteristics. These might include

  • Delayed language skills
  • Delayed movement skills
  • Delayed cognitive or learning skills
  • Hyperactive, impulsive, and/or inattentive behavior
  • Epilepsy or seizure disorder
  • Unusual eating and sleeping habits
  • Gastrointestinal issues (for example, constipation)
  • Unusual mood or emotional reactions
  • Anxiety, stress, or excessive worry
  • Lack of fear or more fear than expected
About Author
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Bahij Khouzami

M.Ed., BCBA, IBA | Founder

Bahij Khouzami is an expert in Applied Behavior Analysis (ABA) specializing in Autism. As a Board Certified Behavior Analyst (BCBA) and an International Behavior Analyst (IBA), Bahij is also a Professional Advisory Board Member of IBAO.
With a Master’s degree in Applied Behavior Analysis, specializing in Autism from Cambridge College in Massachusetts, USA, Bahij has provided ABA services for schools, homes and clinics across Massachusetts, USA.
Highly skilled, Bahij has worked with multidisciplinary teams in clinical, home, nursery and school settings during his career in the United States and now in Dubai.
A passionate teacher, Bahij trains therapists, educators and parents. Through AIS, Bahij remains committed to making a positive impact in the lives of individuals with Autism.

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