What is Autism Spectrum Disorder (ASD)?
Autism, or autism spectrum disorder, refers to a range of conditions characterized by challenges with social skills, repetitive behaviors, speech and nonverbal communication, as well as by unique strengths and differences. We now know that there is not one autism but many types, caused by different combinations of genetic and environmental influences.
The term “spectrum” reflects the wide variation in challenges and strengths possessed by each person with autism.
Autism’s most-obvious signs tend to appear between 2 and 3 years of age. In some cases, it can be diagnosed as early as 18 months. Some developmental delays associated with autism can be identified and addressed even earlier. Autism Speaks urges parents with concerns to seek evaluation without delay, as early intervention can improve outcomes.
Possible signs of autism in babies and toddlers:
- By 6 months, no social smiles or other warm, joyful expressions directed at people
- By 6 months, limited or no eye contact
- By 9 months, no sharing of vocal sounds, smiles or other nonverbal communication
- By 12 months, no babbling
- By 12 months, no use of gestures to communicate (e.g. pointing, reaching, waving etc.)
- By 12 months, no response to name when called
- By 16 months, no words
- By 24 months, no meaningful, two-word phrases
- Any loss of any previously acquired speech, babbling or social skills
Possible signs of autism at any age:
- Avoids eye contact and prefers to be alone
- Struggles with understanding other people’s feelings
- Remains nonverbal or has delayed language development
- Repeats words or phrases over and over (echolalia)
- Gets upset by minor changes in routine or surroundings
- Has highly restricted interests
- Performs repetitive behaviors such as flapping, rocking or spinning
- Has unusual and often intense reactions to sounds, smells, tastes, textures, lights and/or colors
Some facts about Autism
- The Centers for Disease Control and Prevention (CDC) estimates autism’s prevalence as 1 in 68 children in the United States. This includes 1 in 42 boys and 1 in 189 girls.
- An estimated 50,000 teens with autism become adults – and lose school-based autism services – each year.
- Around one third of people with autism remain nonverbal.
- Around one third of people with autism have an intellectual disability.
- Certain medical and mental health issues frequently accompany autism. They include gastrointestinal (GI) disorders, seizures, sleep disturbances, attention deficit and hyperactivity disorder (ADHD), anxiety and phobias.