Most autistic children and adults experience symptoms of anxiety, even if they do not meet the clinical definition of a disorder. Just being different, not fitting in and knowing that things like talking and moving are harder for you than for others can generate anxiety. Research shows that not only unaddressed anxiety disorders but also unaddressed symptoms of anxiety in adolescents significantly increase the risk of anxiety and depressive disorders, bipolar and psychotic disorders, substance abuse and suicidal ideation in late adolescence and young adulthood.
Clearly, it is important to assess every child on the spectrum for anxiety. The focus of the assessment should be beyond anxiety disorders and include symptoms of anxiety that do not reach the criteria for a disorder.
There are three ways to think about anxiety and autism:
1) Anxiety is completely separate from autism. It looks exactly the same in people with autism as it does in others.
2) Autism increases the risk of anxiety. Difficulties in understanding the social world, or bullying, can trigger anxiety. Being overly sensitive to loud noises or other sensory input – common to autism – can make one anxious about those experiences.
3) Anxiety is simply a part of autism, driving the insistence on sameness and avoidance of social situations that are among autism's core symptoms.
There is no consensus in the field about which view might be the most accurate and helpful.
Anxiety in autistic individuals can present in a classic way described in DSM-V. Almost half of the individuals with ASD, however, also have atypical anxiety symptoms that are connected to the core symptoms of ASD and may not fit into DSM-5 categories. A third of individuals with ASD have a mix of classic and atypical symptoms.
Atypical anxiety symptoms can include:
anxiety about sensory stimuli
anxiety about upcoming transitions, possible changes in schedules or possible unexpected events;
anxiety about rule-breaking
interfering worries related to special interests; for example, worries about not having access to a special interest
phobias that have an unusual focus and are not related to sensitivity to sensory stimuli. For example, fears of graffiti, running water, mechanical objects, beards, bubbles, etc.
Social discomfort and fear of social situations without accompanying fear of being negatively viewed, judged or ridiculed. For example:
- somatic complaints in social settings
- frantic attempts to avoid and escape social settings
- aggressive and self-injurious behavior in social settings
Compulsive rigidities/rituals that are not aimed at preventing or reducing distress, achieving a “just right” feeling or preventing a dreaded event or situation; i.e. rigidities/rituals that do not serve any internal function.
The assessment of anxiety in individuals on the spectrum should include both typical and atypical symptoms. The tricky part is that traditional anxiety scales do not capture atypical anxiety. As a result, anxiety can be underestimated or overlooked in autistic individuals if traditional anxiety scales are used. There are some researchers who recognized that an anxiety scale cannot measure anxiety in a population if the population wasn't involved in its development. The group developed a Parent-rated Anxiety Scale (PARS-ASD) to measure anxiety in autistic individuals using focus groups of autistic individuals who shared their subjective experiences with anxiety.
Children on the spectrum who also have anxiety often struggle with it in school. I have had many conversations with teams about anxiety, and the answer I usually get that there is no indication of it. Autistic adults report that others don't understand their anxiety and accuse them of "making excuses" not to engage in certain activities or tasks. Why is it that anxiety is so hard to recognize and believe?
The way I found to explain this phenomenon is that there are three components to anxiety: cognitive (the thoughts going through one's mind), physical (physical sensations, such as sweaty palms or increased heartbeat), and behavioral, which is the only component that can be easily observed. The behavioral component can be compared to the tip of an iceberg, which is only visible when the cognitive and physical components become very intense. If a person's anxiety is not intense enough to show behaviorally, or if the person controls their behavior, anxiety will go unnoticed. But it will not be without high consequences to the person's mental health.