Programs that provide a comprehensive, structured evaluation to identify and diagnose autism spectrum disorder in adults which may not have been detected or diagnosed earlier in life. Autism related symptoms may include difficulties with social anxiety, sensory sensitivity, self-regulation, social cues, communication, and repetitive patterns of behavior or interest. An evaluation is generally offered by physicians, psychologists, and other trained specialists who will take into consideration reported symptoms as well as their own analysis and observations of the individual's behavior. If diagnosed, supportive therapies including cognitive, verbal, and applied behavioral therapy may be recommended.

Programs that provide a comprehensive, structured evaluation of a child's cognitive/intellectual functioning, language and communication skills, independent living skills, social and emotional development and perceptual/motor functioning in order to identify individuals who show developmental delays, determine the nature and extent of the problem and recommend a course of treatment and care. Developmental assessments are generally offered by a developmental assessment specialist, or a team of professionals that can include a pediatrician, language specialist, audiologist, occupational therapist, child psychologist and child psychiatrist, among others. They involve age-adjusted questions regarding a child's growth, physical movements, behavior, play, and interactions with family members and the rest of the world as well as a series of tests that may include a physical exam, hearing and eye screenings, play observation, and standardized tests that present the child with specific tasks to determine areas of strength and weakness. They can also be used to identify individuals who have developmental disabilities such as intellectual disabilities, epilepsy, cerebral palsy, autism and neurological impairments, in order to establish eligibility for state and federally funded programs.

Individuals who are generally between the ages of 18 and 25 depending on the ages that specific programs use for qualification.

A developmental disorder that affects communication and behavior, and includes symptoms that impair the individual's ability to function properly in school, work and other areas of life. Although autism can be diagnosed at any age, it is said to be a "developmental disorder" because symptoms generally appear in the first two years of life. Autism is also known as a "spectrum" disorder because there is wide variation in the type and severity of symptoms people experience. People with ASD have difficulty with social communication and interaction (e.g. lack of eye contact, voice tones that sound sing-song or robotic, facial expressions or gestures that don't match what is being said), restricted interests (e.g., intense interest in numbers, details, facts), restrictive/repetitive behavior (e.g., repeating words or phrases, getting upset at changes in routine or sensory input such as light or noise). People with ASD may also experience sleep problems or irritability, but also have many strengths including the ability to learn things in detail and remember information for long periods of time; being strong visual and auditory learners; and excelling in math, science, music or art. But although ASD can be a lifelong disorder and while children who have ASD have difficulty in talking, playing with other children, and relating to others, including their own family, treatment and services can improve their symptoms and ability to function.