Impostor Syndrome and ADHD

One day can hold both extremes. In the morning, four uninterrupted hours on a complex file, with a result nobody on the team would have produced as quickly. In the afternoon, forty minutes spent not sending a three-line email, for no identifiable reason.

The next day, someone praises the morning's work. And the inner reaction isn't pride: it is worry. Because the person knows what the afternoon cost, and has no idea what tomorrow will be made of.

Something very particular is knotted there. The ordinary impostor experience consists in not believing your own successes. Here another order of problem is added: competence is not predictable, and it is unpredictable first of all to the person themselves. It is hard to feel legitimate in a role when you don't know whether you will be able to do tomorrow what you did yesterday.

Two necessary clarifications. The impostor experience, described by Clance and Imes in 1978, is neither a diagnosis nor an illness: it is a subjective experience appearing in no classification. Attention deficit disorder, by contrast, does belong to medical classifications — and that is precisely why it cannot be recognised in an article: its assessment is conducted with a qualified professional, through an in-depth interview and a life history, never through a list read online.

In the article that follows, I explore the link between uneven performance and doubt about professional legitimacy. If you recognise yourself in this theme, the tests on the platform help you take stock.

What a trajectory of misattributed failures leaves behind

The starting point is rarely professional. It is educational, and it is old.

For years, feedback wasn't about results but about what you were supposed to be: "you could if you wanted to", "you don't make an effort", "you're bright but you don't apply yourself". Those sentences share one feature, and it is decisive: they attribute the difficulty to an internal, stable cause — to character.

That is exactly the pattern Bernard Weiner described as the most psychologically expensive. A difficulty attributed to method can be corrected; attributed to lack of will, it becomes a fact about you. And when the same explanation is repeated by dozens of adults over twelve years, it no longer needs verifying: it becomes the background.

Twenty years later, in a role where everything is going well, that background is still running. It needs only a minor incident — a forgotten task, a late reply, a missed proofread — to speak up again in its original words.

Uneven performance, and why it rules out relying on yourself

This is the mechanism most specific to the subject, and the least understood from outside.

The attentional functioning at issue here is not a constant deficit: it is variability. Concentration depends heavily on how interesting the task is, on urgency, on novelty, on fatigue, on ambient noise, on the time of day. On an engaging subject, performance can be remarkable and last for hours. On a low-stakes administrative task, it can be near zero.

Seen from the inside, that has a formidable consequence: you cannot generalise from your own successes. Someone who succeeds at something hard normally draws information from it — "I can do this." Here, the information is immediately invalidated by repeated experience of the opposite, sometimes on simpler tasks.

The impostor experience then sets in not despite the evidence but because of the structure of the evidence itself. It is contradictory, and the most cautious reading — the one almost everyone adopts in that situation — is to keep the bad half.

It also feeds a very widespread belief: "I only get through on urgency." The fact that a close deadline genuinely unlocks getting started is experienced as proof of cheating, when it is simply a feature of how this functioning works.

Invisible effort

The third mechanism, and the one that makes colleagues' feedback useless.

What costs most is not what shows. Intellectual production can be fluid while everything else — getting started, holding an order of priorities, not drifting onto another topic, finding the file again, proofreading without skipping a line, sending on time — consumes considerable and entirely silent energy.

The result: compliments land on the easy part, and criticism lands on the expensive part. Someone can be praised for an analysis that took one enjoyable hour, and pulled up on a report that took three painful ones. Inside, both messages say the same thing: what counts for them is precisely what I can't hold together.

Add to that the tiredness of concealment. Many people develop effective compensation strategies — alarms, lists, double checks, arriving early, working in the evening to make up a lost afternoon — and show them to nobody. Invisible compensation then produces the same effect as over-preparation in the ordinary impostor experience: it allows you to succeed, and it prevents the success from being credited to ability. The attribution mechanism is the same, it is simply fed by a different history.

What helps, and what doesn't

What doesn't help: repeating that you are competent. In this particular case the argument is unusually weak, because the person holds real and numerous counter-examples. They are not lying when they say they have failed at things. The problem isn't the fact, it is the explanation given for it. What helps first: distinguishing, on specific examples, what belongs to a difficulty of starting or organising from what belongs to a difficulty of understanding or level. That distinction is almost always missing at the outset — everything is filed in the same place, "I'm not good enough" — and it changes a great deal once made, because it separates what can be arranged from what does not arise. What helps next: having external material. Self-assessments go round in circles here more than elsewhere, precisely because this profile's memory is rich in incidents and poor in series. That is the value of a dated record of facts: it restores proportion. ScanMyJob analyses written work exchanges and surfaces what contradicts your reading as much as what supports it — that is its main purpose, and it is especially useful when your reading of yourself rests on a few striking episodes. What comes out is concrete: which topics get routed to you by preference, when your opinion is sought, requests to arbitrate, your actual response times compared with what you believe them to be. Many people convinced they are "borderline" discover that the files nobody wants to open are systematically sent to them. The gallery of examples shows four real cases with their full records. And finally, if the question genuinely arises: it arises with a professional. Attentional functioning is assessed in interview, with a developmental history, not with a list of traits. The workplace adjustments that exist depend entirely on that framing.

What this article does not do

It does not say, and cannot say, that ADHD applies to you. Recognising yourself in a description is not an assessment. Much of what is described here — unevenness, difficulty starting, invisible effort — also occurs in occupational exhaustion, in anxiety, in periods of overload, and in people who fall into none of those categories. Only a qualified professional can sort that out, and they do it in interview. It poses no verdict on the impostor experience either, because there is nothing to diagnose there: it is not an illness and appears in no classification. It does not replace professional advice. If these difficulties have concrete consequences — on sleep, on staying in the role, on general condition — that belongs with a doctor, a psychologist, or an occupational health service where one exists. And the question of the environment remains fully open. Some roles make visible a difficulty others would never have revealed: a noisy open plan office, constant interruptions, no stated priorities, disproportionate reporting. Whether the problem lies inside or in how the work is organised is not settled by this article, and it is often the first question to investigate.