ADHD or Anxiety? When the Symptoms Look Similar

A person experiencing anxiety may be preoccupied with recurring thoughts about the future, the possibility of making a mistake or other people’s reactions.

These thoughts occupy some of the resources of attention and working memory, making it harder to take in new information. For example, a student who struggles to concentrate in class may be preoccupied with whether she will do well on an upcoming test. From the outside she appears distracted, but the main difficulty is related to the worry occupying her mind.

In ADHD, by contrast, attention difficulties may occur even without significant worry or a sense of threat.

Procrastination may occur in both conditions, but the reasons behind it are not necessarily the same.

A person with anxiety may put off a task because they fear failing, being judged or dealing with a result that is not perfect.

A person with ADHD may put it off even when they want to do it and are not afraid of the outcome, because of difficulty initiating an action or organizing the steps of the task.

Sometimes both mechanisms occur together: ongoing difficulty completing tasks creates experiences of failure, and anxiety about facing another task develops later.

For a person with anxiety, restlessness may appear as muscle tension, heightened alertness, difficulty relaxing or a constant need to check that everything is under control.

In ADHD, restlessness may manifest as a need to move, difficulty waiting or a sense of inner agitation even in an environment that is not threatening. However, this is not an absolute distinction. Anxiety can manifest as physical movement, and people with ADHD may experience significant bodily tension. It is therefore important to examine the circumstances in which restlessness occurs and the emotional experience accompanying it.

Some people with ADHD develop rigid compensatory strategies: repeated checking, detailed lists, overplanning and fear of forgetting details.

These behaviors may look like an anxiety-driven need for control, but sometimes they developed as a way of coping with organizational difficulties and repeated mistakes. Conversely, anxiety itself may also lead to repeated checking and excessive planning.

The important question is not only what the person does, but what drives the behavior and what happens when they cannot carry it out.

Absolutely.

Some children and adults manage to meet expectations through considerable effort, lengthy preparation and excessive meticulousness. Their achievements may be good, so their attention difficulties go unrecognized for years. Sometimes it is only when demands increase, for example when moving to middle school, higher education or independent work, that compensatory mechanisms are no longer sufficient.

In other situations, anxiety is the main reason for concentration difficulties, and there is no underlying attention disorder.

One of the important questions in a professional evaluation is how functioning changes when anxiety levels fall. If concentration difficulties decrease significantly following treatment for anxiety, this may indicate that anxiety contributes substantially to the difficulties.

If the difficulties persist even during calm periods, there is reason to continue exploring other factors, including ADHD. However, improvement or a lack of improvement following treatment does not constitute a diagnostic test in itself.

The MOXO test provides quantitative data on performance across four measures: attention, timing, impulsivity and excessive responding. It allows performance to be examined during a computerized task, including under conditions involving visual and auditory distractors.

When the question of ADHD versus anxiety arises, the test may add information about performance patterns, but cannot determine whether the source of the difficulty is anxiety or ADHD. The results must therefore be interpreted alongside a clinical interview, developmental history, information about functioning and emotional characteristics.

When the source of the difficulty is not identified correctly, a person may receive support that does not address the main factors underlying their distress. Someone who is primarily experiencing anxiety may need treatment focused on worrying, avoidance and fear of failure. Someone with ADHD may benefit from interventions focused on executive functions, organization and attention regulation. When both conditions occur together, a treatment plan addressing both is needed.

An accurate diagnosis is not only about giving the difficulty a name, but about understanding what maintains it and what kind of support may help the person function better.