Clinicians

Ethical Issues in ADHD Evaluation: Malingering, Secondary Gain, and the Accommodation Request

September 15, 2026 · 7 min read

Last updated September 15, 2026

Most adults who seek ADHD evaluation are seeking an explanation for real suffering. Some are seeking a stimulant prescription, extended time on the bar exam, or a reason a semester went badly, and they know what to say. Studies in which undergraduates were asked to feign ADHD found that most could produce clinically elevated rating scale scores with no coaching. The counselor who does not think about this is not protecting the client, the public, or their own license. This article is about thinking about it without becoming suspicious of everyone.

The scope of the problem

Research on simulated ADHD is consistent: self-report rating scales are easily faked, and symptom descriptions are widely available. Estimates of exaggeration or feigning in adult ADHD evaluations, particularly in university settings, range from 10 to 50 percent depending on the sample and the criteria. This does not mean most clients are feigning. It means that self-report alone cannot distinguish genuine from feigned ADHD, and that the evaluation must include elements that can.

What cannot be faked easily

Childhood onset documented by records. Report cards, prior evaluations, and school records were created before any incentive existed, and they are the strongest evidence in the file. Collateral from a parent about childhood is next, though it is not immune to coaching. Performance validity: continuous performance tests and other performance measures are harder to fake convincingly than rating scales, because the feigner tends to overdo it, producing profiles worse than genuine ADHD, or produces inconsistent patterns. Embedded validity indicators in rating scales (the CAARS and BAARS have infrequency and inconsistency indices) flag improbable response patterns. And the interview itself, conducted by an experienced clinician who asks for specific examples rather than symptom endorsements, is difficult to navigate with a memorized symptom list.

Signs that warrant closer attention

No childhood history and no records offered, or records that do not match the account. Symptoms described in textbook language rather than in personal examples. Endorsement of every symptom at maximum severity, which genuine ADHD rarely produces. Performance test results far worse than the client's functional history would predict, or dramatically inconsistent across measures. A stated goal at the outset (a specific medication by name, a specific accommodation) with resistance to alternatives. Prior evaluations that did not find ADHD, now sought again. Recent onset of symptoms coinciding with a new demand. None of these is conclusive. Each is a reason to gather more evidence.

Adding performance validity

Include at least one measure with embedded or standalone validity indicators in every adult ADHD evaluation, and say so in the report. Standalone performance validity tests (the TOMM, the MSVT, or similar) are used routinely in neuropsychology and are appropriate when incentive is present. Report the validity findings neutrally: 'Performance validity indicators were within normal limits, supporting the interpretability of the test results,' or 'Performance validity indicators were below expected levels, which limits confidence in the test results; the diagnosis below rests primarily on documented history.' Confirm that the instruments are within your training and scope.

The client who wants a specific outcome

Most clients who arrive wanting a diagnosis are not feigning; they have researched their own experience and reached a conclusion. Treat the stated goal as information, not as evidence of deception, and explain at the outset that the evaluation will follow the evidence wherever it leads. Then follow it. If the evidence supports ADHD, the client's prior belief does not weaken the finding. If it does not, say so with the same care described in the feedback article, and offer what was found. A client who wanted ADHD and receives anxiety with a treatment plan has been served; one who receives a diagnosis they do not have has been harmed, and so has the next person whose accommodation request is doubted because of it.

Writing under pressure

The pressures are real: the client's distress, the university deadline, the referral source's expectation, the counselor's own discomfort with delivering unwelcome news. The report must nonetheless say what the evidence shows, including uncertainty. 'The evaluation supports a diagnosis of ADHD' when it does. 'The evaluation found significant attention difficulties but the evidence for childhood onset is limited and performance validity was questionable; a definitive ADHD diagnosis cannot be made at this time' when that is the case. Testing agencies and universities read many reports and can recognize both a thorough one and an accommodating one; a counselor known for the second loses credibility for all their clients.

Accommodation requests specifically

A request for testing or academic accommodations requires documentation of a current functional limitation, not merely a diagnosis. The report should describe how the ADHD impairs the specific activity (timed reading, sustained attention across a multi-hour exam) with evidence, and should recommend accommodations proportionate to that impairment. Recommending time and a half for a client whose evaluation shows mild inattention with intact processing speed is not advocacy; it is an inflated recommendation that will be scrutinized. Agencies increasingly require the evaluator to address alternative explanations and validity explicitly; know the documentation guidelines of the relevant agency before writing.

The bottom line

Adult ADHD evaluations carry incentives, self-report is easily faked, and the counselor's responsibility is to include evidence that cannot be: childhood records, collateral, performance validity, and a specific-example interview. Treat a stated goal as information, follow the evidence, write the uncertainty into the report, and recommend accommodations proportionate to documented impairment. Protecting the integrity of the evaluation protects every genuine client whose report follows yours.