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Understanding Autism Spectrum Disorder (ASD)

Learn about Autism Spectrum Disorder (ASD) including its evaluation process, common symptoms, and notable individuals with ASD. Discover how the diagnosis has evolved and why Asperger's is no longer used.

Understanding Autism Spectrum Disorder (ASD)

Understanding Autism Spectrum Disorder (ASD)


Autism Spectrum Disorder (ASD) is a developmental disorder that affects communication, behavior, and social interaction. It is called a "spectrum" disorder because it encompasses a wide range of symptoms and levels of impairment. Individuals with ASD may exhibit challenges ranging from mild to severe, impacting their ability to communicate and interact with others.


Evaluation and Diagnosis of ASD

The evaluation and diagnosis of ASD typically involve a multi-disciplinary team of healthcare professionals, including pediatricians, psychologists, and speech therapists. The diagnostic process often includes:

  1. Developmental Screening: This is a short test to determine if children are learning basic skills when they should or if they might have developmental delays.

  2. Comprehensive Diagnostic Evaluation: This thorough review includes a hearing and vision screening, genetic testing, neurological testing, and other medical testing. Additionally, it involves a detailed history of the child's behavior and development, often through interviews with parents and caregivers.


The Shift from Asperger's Syndrome to ASD

As of the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition), Asperger's Syndrome is no longer a separate diagnosis. Instead, it is included under the umbrella of Autism Spectrum Disorder. This change was made to better reflect the continuum of symptoms and severities observed in individuals with ASD.


Common Signs (Symptoms) of ASD

Symptoms of ASD can vary widely but often include:

  • Social Communication Challenges:

    • Difficulty understanding social cues such as facial expressions, body language, and tone of voice.

    • Trouble making eye contact or holding a conversation.

    • Difficulty forming and maintaining relationships.

    • Limited interest in peer interactions.

  • Behavioral and Sensory Challenges:

    • Engaging in repetitive behaviors such as hand-flapping, rocking, or repeating phrases.

    • Strong preference for routines and difficulty with changes or transitions.

    • Intense focus on specific interests or activities.

    • Sensitivity to sensory stimuli such as sounds, lights, textures, or smells.

  • Communication Challenges:

    • Delayed speech development or loss of previously acquired speech.

    • Using few or no gestures (e.g., pointing, waving).

    • Difficulty starting or maintaining a conversation.

    • Echolalia (repeating words or phrases).


Levels of ASD

ASD is categorized into three levels based on the support required:



  1. Level 1: Requiring Support

    • Social Communication: Individuals may have difficulty initiating social interactions and may appear to have decreased interest in social interactions. For example, they might struggle to make friends or engage in back-and-forth conversations.

    • Behavioral Flexibility: May show inflexibility of behavior that interferes with functioning in one or more contexts. They might have difficulty switching between activities and may struggle with organization and planning.

  2. Level 2: Requiring Substantial Support

    • Social Communication: Individuals may have marked deficits in verbal and nonverbal social communication skills, and social impairments are apparent even with supports in place. For example, they might have limited speech and difficulty coping with social demands.

    • Behavioral Flexibility: Demonstrates inflexible behavior, difficulty coping with change, and other restricted/repetitive behaviors that are obvious to the casual observer and interfere with functioning in a variety of contexts.

  3. Level 3: Requiring Very Substantial Support

    • Social Communication: Individuals may have severe deficits in verbal and nonverbal social communication skills, causing severe impairments in functioning. They might be nonverbal or have very limited communication abilities and might rely on alternative communication methods such as picture boards or speech-generating devices.

    • Behavioral Flexibility: Exhibits extreme difficulty coping with change and engages in repetitive behaviors that markedly interfere with functioning. They may have intense responses to sensory stimuli and require substantial assistance to manage daily activities.


How Testing is Done



Testing for ASD involves several comprehensive steps to ensure an accurate diagnosis:

  1. Initial Screening:

    • Developmental Surveillance: Pediatricians often monitor developmental milestones during regular check-ups. Parents may be asked about their child’s social, communication, and play behaviors.

    • Standardized Screening Tools: Tools like the Modified Checklist for Autism in Toddlers (M-CHAT) are commonly used. These questionnaires help identify children who may need further evaluation.

  2. Developmental Evaluation:

    • Multi-disciplinary Approach: A team of specialists, including psychologists, neurologists, and speech therapists, conducts a detailed evaluation.

    • In-depth Behavioral Observations: Children are observed in various settings to assess their behavior, communication skills, and social interactions.

    • Parent and Teacher Interviews: Gathering comprehensive information from those who interact closely with the child provides a broader understanding of the child's behavior across different environments.

    • Standardized Tests: Assessments such as the Autism Diagnostic Observation Schedule (ADOS) and the Autism Diagnostic Interview-Revised (ADI-R) are used to evaluate specific behaviors and skills related to autism.

  3. Behavioral Assessments:

    • Functional Behavioral Analysis (FBA): Identifies the reasons behind specific behaviors by observing the child’s interactions and environment.

    • Adaptive Behavior Assessments: Measures the child’s ability to adapt and manage daily life skills compared to typically developing peers.


Role of Parents in Supporting Children with ASD

Parents play a crucial role in the early detection and support of children with ASD. Here are some ways parents can help:

  • Monitoring Developmental Milestones: Being aware of the typical developmental milestones and monitoring any delays or concerns.

  • Seeking Early Intervention: Promptly seeking evaluation and intervention services if developmental delays or ASD symptoms are suspected.

  • Advocating for the Child: Working with healthcare providers, educators, and therapists to ensure the child receives appropriate services and support.

  • Creating a Supportive Environment: Establishing routines, using visual aids, and providing a sensory-friendly environment can help children with ASD manage their daily activities.

  • Continuing Education: Staying informed about the latest research, therapies, and strategies for supporting children with ASD.


Personal Story

I believed our son had ASD around 18 months of age. He was slow to talk, and I noticed he loved to line up his toy trucks and cars by size and color. He would get very mad if I or his mother moved them out of order. He would also have massive meltdowns, and we both started to notice that certain sensory inputs (such as sand) really bothered him and could trigger the meltdown.


It took us another 9 months once we suspected ASD to actually get a diagnosis. A lot of the providers that offered services for giving a diagnosis were very slow to return our calls and emails, and it wasn't until we joined some Facebook groups that people gave us the names of others with a much shorter wait time.


Getting the diagnosis was just the first step. We were then basically alone on figuring what to do next. This is a major reason we started Arloa. We want Arloa to be available 24/7, to everyone, to answer any question you might have and to help you navigate getting IEPs, services, and personalized recommendations that are suitable for your unique child and situation.


Key Statistics on ASD

  • Approximately 1 in 36 (2.8%) children are diagnosed with Autism Spectrum Disorder (ASD) in the United States.

  • Boys are four times more likely to be diagnosed with ASD than girls.

  • ASD prevalence per 1,000 children aged 8 years ranged from 23.1 in Maryland to 44.9 in California.

  • Around 44% of children with ASD have average to above-average intellectual abilities.

  • The average age of diagnosis is 4 years, though signs can be detected as early as 18 months.

  • 31% of children with ASD have an intellectual disability (IQ < 70).

  • Early intervention can significantly improve development in children with ASD.

  • Children who receive intervention by age 3 show better social skills, communication, and cognitive abilities compared to those who receive later intervention.

  • Early interventions, such as speech therapy, occupational therapy, and behavioral therapy, lead to better outcomes.

  • Children who start intervention early are more likely to attend mainstream schools and achieve higher levels of independence.


Famous People with ASD

Many people with ASD have achieved significant success in various fields. Some notable individuals include:

  • Temple Grandin: A professor of animal science and advocate for people with autism.

  • Dan Aykroyd: An actor and comedian known for his work on "Saturday Night Live" and "Ghostbusters."

  • Susan Boyle - Touched the world with her voice on "Britain's Got Talent".

  • Satoshi Tajiri: The creator of Pokémon, who has been open about his autism diagnosis.

By understanding ASD, its symptoms, and the evaluation process, parents can better navigate the challenges and support their children effectively. This comprehensive overview aims to provide practical information and hope to families affected by ASD.


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