I Did Well at School – Could I Still Have ADHD?

 

When people think about ADHD, they may picture a child who struggles at school: someone who cannot concentrate in lessons, is frequently in trouble, fails to complete their work, or achieves grades below their ability.

For some people with ADHD, this is indeed part of their experience. But it is certainly not true for everyone.

At Clear Sky Therapies, we sometimes meet adults and young people who question whether ADHD can really apply to them because they did well academically. They may have achieved good GCSEs or A-levels, gone to university, completed professional qualifications, or developed successful careers.

I have confirmed an ADHD diagnosis with a young woman who achieved A*s and distinctions, in all of her examinations throughout her entire education.

Doing well at school does not, by itself, rule out ADHD.

The more useful question is often not simply “Did you succeed?”, but “What did it take for you to succeed?”

ADHD Is not a measure of intelligence

ADHD is a neurodevelopmental condition associated with differences in the regulation of attention, activity and impulses. It can also have an important impact upon executive functions involved in organising, planning, starting tasks, managing time and maintaining effort.

None of these things determine intelligence.

A bright young person may therefore understand their schoolwork very well while simultaneously struggling to organise themselves, remember homework, begin assignments or concentrate on subjects that do not capture their interest.

Strong cognitive ability can sometimes help a person compensate for these difficulties for many years.

This can create an apparent contradiction:

“If I have ADHD, how did I manage to achieve so much?”

Sometimes the answer lies in looking at how that achievement was accomplished rather than the achievement itself.

The ‘Last-Minute’ pattern

One pattern sometimes described by people with ADHD is difficulty engaging with a task until there is sufficient urgency.

An assignment might be known about for three weeks, thought about repeatedly and genuinely intended to be started — yet somehow very little happens until the deadline becomes imminent.

Suddenly, the pressure of having only a few hours remaining creates intense focus.

The work gets completed.

The grade may even be excellent.

From the outside, there appears to be no difficulty at all. The finished assignment provides evidence of academic competence.

What remains invisible is the procrastination, frustration, anxiety, disrupted sleep and enormous burst of effort required to produce it.

If this happens repeatedly, someone may eventually conclude:

“I work best under pressure.”

That may be true to an extent. But it can also be worth asking why pressure is necessary before attention and motivation become reliably available.

School and parents often provide more structure (scaffolding) than we sometimes realise

 

Another reason ADHD can become more noticeable later in life is that school provides considerable external structure.

• There is a timetable.
• Someone tells you where to be.
• Lessons have defined beginning and ending points.
• Teachers set deadlines.
• Parents may wake you up, prepare meals, provide transport, remind you about homework, find lost belongings and make sure you leave the house on time.

This support can act as an external executive-function system.

A young person may therefore function relatively well within a structured environment without recognising how much scaffolding is helping them to do so.

 

Why University can be a turning point

For some people, the transition to university exposes difficulties that were previously manageable.

Suddenly there may be fewer externally imposed routines and much greater responsibility for:

• organising study time;
• attending lectures without prompting;
• managing several distant deadlines;
• maintaining sleep routines;
• cooking and shopping;
• managing money;
• remembering appointments;
• completing independent reading;
• balancing study, relationships and social life.

Someone who achieved excellent A-level results can consequently find themselves struggling unexpectedly.

This can be confusing and distressing.

They may interpret the problem as laziness or lack of discipline:

“I know I’m capable of doing this, so why can’t I just get myself to do it?”

The difficulty may not be understanding the work. It may lie in regulating attention, motivation, time and action without the external structure that previously supported them.

Anxiety can sometimes help someone compensate

Not every successful student with ADHD appears relaxed or effortlessly capable.

For some people, anxiety becomes part of the system that keeps everything functioning:

• Fear of forgetting something may lead to repeated checking.
• Fear of being late may mean arriving excessively early.
• Fear of disappointing other people may drive perfectionism.
• Fear of failure may provide enough urgency to overcome procrastination.

These strategies can be surprisingly effective.

The difficulty is that effective compensation is not necessarily comfortable or sustainable.

A person can therefore look highly organised to everybody else while privately feeling that their life is held together through constant vigilance and effort.

What about people who were quiet at school?

ADHD can also be missed when difficulties do not create problems for other people.

A pupil who is disruptive, impulsive or frequently leaves their seat is likely to attract attention.

Someone who quietly daydreams, loses track of what the teacher is saying, doodles, mentally drifts away or takes much longer than expected to complete homework may attract considerably less.

This is particularly relevant when considering predominantly inattentive presentations of ADHD.

Some people only begin to recognise these patterns retrospectively after learning more about ADHD as an adult.

“But I could concentrate for hours on things I enjoyed”

 

This is another common reason people dismiss the possibility of ADHD.   ADHD does not necessarily mean an inability to concentrate.  Attention can instead be difficult to regulate.

Someone might struggle considerably to sustain attention during routine administrative work but become completely absorbed in a stimulating project, hobby, game or area of special interest.

They may lose track of time and continue for hours.

The apparent contradiction between “I can’t concentrate” and “sometimes I concentrate more intensely than everyone else” can make much more sense when ADHD is understood as a difficulty regulating attention rather than simply having too little of it.

Childhood still matters in an ADHD assessment

None of this means that doing well academically is evidence that someone has ADHD.

Many people procrastinate, dislike boring tasks, occasionally lose things or struggle when they first go to university.

ADHD assessment therefore requires considerably more than identifying a collection of relatable experiences.

ADHD is understood as a neurodevelopmental condition, meaning that evidence of relevant characteristics should be present during childhood, even if ADHD was not recognised or diagnosed at the time.

A comprehensive assessment may therefore explore much more than examination results.

For example:

• Were you frequently distracted or daydreaming?
• Did you lose possessions?
• Did you forget instructions?
• Was homework repeatedly left until the last moment?
• Did parents provide substantial organisational support?
• Were school reports full of comments such as “needs to concentrate,” “easily distracted,” or “does not fulfil their potential”?
• Were you unusually talkative or impulsive?
• Did you constantly need stimulation?
• Was there a large difference between subjects you found interesting and those you did not?
• Did apparently good achievement require disproportionate effort?

Where possible, clinicians may also consider school reports and information from parents or other people who knew the person during childhood.

The purpose is not to search retrospectively for evidence that confirms ADHD, but to develop an accurate picture of the person’s development.

ADHD is about more than academic performance

Another important consideration is that ADHD does not only affect education.

Someone may have performed extremely well academically while experiencing significant difficulties elsewhere.

These might include:

• chronic lateness;
• losing important belongings;
• forgetting appointments;
• difficulty maintaining routines;
• impulsive spending;
• sleep difficulties;
• emotional dysregulation;
• unfinished projects;
• problems maintaining household organisation;
• difficulties managing competing demands;
• relationship difficulties associated with forgetfulness, impulsivity or inattention.

This is one reason a good ADHD assessment considers the whole person rather than simply their educational history.

Could something else explain the difficulties?

This is equally important.

Experiencing difficulties with concentration, organisation or motivation does not automatically mean someone has ADHD.

Similar experiences can occur alongside anxiety, depression, trauma, sleep difficulties, Autism and a range of other psychological or medical factors.  Sometimes several factors coexist.

A thorough ADHD assessment should therefore ask two questions:

Is there good evidence for ADHD?

…and,

 

Is ADHD the best explanation for the difficulties this person experiences?

That distinction is important.

The purpose of assessment should not simply be to obtain a diagnosis. It should be to develop the most accurate and useful understanding of the person possible.

So, can you have ADHD if you did well at school?

Yes.  Academic success does not exclude ADHD.

Neither, however, does academic success combined with procrastination or distractibility establish that ADHD is present.

What matters is the broader developmental picture: how longstanding the difficulties are, whether they occur across different areas of life, the degree to which they affect every day functioning, what strategies have been required to compensate for them, and whether another explanation better accounts for the person’s experiences.

For some people, recognising this distinction can be important.

The question changes from:

“How could I possibly have ADHD when I did well at school?”

to:

“How did I actually manage to do well — and what did it cost me to keep doing so?”

That can be a much more useful place from which to begin exploring whether an ADHD assessment might be appropriate.