A claimant may have a genuine psychological condition while overstating its severity, persistence or effect upon daily life. The expert’s task is not to choose between “injured” and “dishonest” at the first sign of inconsistency. It is to determine which parts of the presentation remain medically supported and which do not.
Diagnosis and disability are separate questions.
A valid diagnosis does not prove every claimed restriction. A claimant may meet the criteria for an anxiety disorder but still be capable of travelling, working or socialising more extensively than reported. Another may describe severe symptoms while the available evidence supports only a mild or short-lived condition.
The expert should therefore address several questions separately: Does the claimant have a recognised psychological condition? Was it caused or aggravated by the index event? How severe is it? What effect does it have upon function? Is the reported disability consistent with the clinical findings and wider evidence?
A weakness in one part of the claim does not necessarily destroy the others.
For example, evidence that a claimant can drive occasionally may contradict an assertion that they are completely unable to enter a vehicle. It does not by itself establish that travel anxiety never existed. The proper opinion may be that the claimant developed genuine anxiety but has overstated the extent of the resulting avoidance.
That is less dramatic than declaring the whole presentation false. It is often more accurate.
Exaggeration is not a diagnosis.
The word “exaggeration” covers several different processes.
A frightened claimant may describe symptoms in absolute language because they are focused upon their worst days. A person with chronic pain may underestimate what they can do because activity has become associated with fear. Memory may become less precise over time. Some claimants misunderstand questions about capacity and describe what they avoid rather than what they are physically or psychologically capable of doing.
There may also be deliberate overstatement for an external advantage. In clinical and forensic literature, malingering refers to the intentional production or substantial exaggeration of symptoms for an external incentive. The requirement for intention is important. An unusual presentation, inconsistency or elevated questionnaire score does not establish it on its own.
The expert should not move casually from “the account is unsupported” to “the claimant is malingering”. Those are different conclusions requiring different evidence.
There will be cases in which deliberate exaggeration is strongly indicated. Even then, the expert must consider whether a genuine underlying condition remains present.
Psychological symptoms can vary.
Psychological function is not constant throughout the day or across every setting.
A claimant with travel anxiety may cope better on familiar roads, as a passenger, or when accompanied by somebody they trust. A person with depression may attend a family event but spend the following day withdrawn and exhausted. Someone with post-traumatic symptoms may function adequately in ordinary circumstances yet react strongly to a particular reminder.
Variability should not become a universal explanation for contradictory evidence. A claimant who repeatedly undertakes activities they have denied being able to perform presents a real evidential difficulty. The expert should nevertheless examine the circumstances before treating one episode as proof of general capacity.
What activity was shown? How long did it last? Was assistance provided? Was there any evidence about symptoms before or afterwards? Does the material contradict the existence of the condition, or only the claimed level of restriction?
Surveillance and social-media material can be informative. They rarely interpret themselves.
Validity measures require restraint.
Psychological questionnaires may contain validity indicators, and specialist assessments may include symptom or performance validity measures. These tools can identify response patterns that require closer examination.
They should not be treated as mechanical lie detectors.
Research on validity assessment warns that failure in one domain does not necessarily invalidate every other aspect of the assessment. A person may provide questionable symptom reporting while performing validly on cognitive measures, or the reverse. The whole clinical and evidential picture remains necessary.
Results may also be affected by misunderstanding, language, literacy, distress, neurodevelopmental conditions or the way a measure was administered. The expert must understand the limitations of the test and avoid conclusions extending beyond what it was designed to assess.
A high symptom score does not prove severe disability. An unusual validity result does not, without more, prove intentional deception.
Look for convergence, not a single decisive fact.
A defensible opinion should draw upon several sources.
The claimant’s account remains important, but it should be compared with contemporaneous medical records, treatment notes, employment material, witness evidence, observed presentation and documented activities. Previous psychological history and unrelated stressors may also affect diagnosis and causation.
The expert should look for convergence. Do different sources broadly support the same onset, symptom pattern and functional effect? Where they differ, is there a clinically plausible explanation?
Practice Direction 35 requires expert evidence to be independent and objective. Experts must consider all material facts, including those that detract from their opinions, and must identify any qualification where a definite opinion cannot be given.
The GMC similarly requires medical experts to provide accurate, non-misleading evidence, include relevant information and explain when an opinion is qualified because the evidence conflicts.
This means adverse evidence cannot be omitted because it is inconvenient. It also means that one adverse item should not be allowed to erase a well-supported diagnosis without proper reasoning.
Describe what is supported.
The most useful report may conclude that the claimant sustained a genuine psychological injury, but that the alleged severity or duration is not fully supported.
The expert might say:
The available evidence supports the presence of accident-related travel anxiety. However, the reported inability to undertake any vehicle travel is inconsistent with the documented activities. I therefore accept the diagnosis but not the claimed degree of functional restriction.
In another case, the inconsistencies may be so extensive that the expert cannot rely upon the claimant’s account sufficiently to confirm diagnosis or causation. That should be stated plainly.
The report should identify which evidence remains reliable, which assertions are doubtful and how those difficulties affect the opinion. It should not simply attach the label “exaggeration” and leave the court to guess what follows from it.
Intentional dishonesty is ultimately for the court.
An expert can comment on clinical plausibility, consistency and the reliability of the evidential basis. They can explain that behaviour appears inconsistent with the claimed symptoms or that the presentation suggests conscious overstatement.
They should remain cautious about making a final finding of dishonesty. That decision may depend upon witness evidence, disclosure, surveillance and cross-examination beyond the expert’s medical assessment. The expert’s role is to assist the court, not to assume the role of advocate or factfinder.
Where the evidence allows more than one interpretation, the report should acknowledge that. Where later material changes the expert’s opinion, the change must be communicated rather than defended away. Both CPR guidance and the GMC require material changes of view to be reported promptly. Genuine psychological injury and symptom exaggeration can coexist. Recognising one does not require the expert to deny the other.
The difficult task is to separate the condition the claimant has from the disability they claim to have. That requires more than accepting the account at face value, but also more than searching for a reason to reject it. An expert who mistakes exaggeration for proof that no injury exists may understate a genuine condition. An expert who treats a valid diagnosis as confirmation of every alleged restriction may overstate the claim.
The court needs neither reflexive suspicion nor unquestioning acceptance. It needs a careful explanation of what the evidence supports, what it contradicts and what remains uncertain.
