You suffered a head injury in a Missouri car crash. The CT scan came back normal, but your memory fails you, your concentration breaks down by midday, and your family says you are not the same person. Then the insurance company's doctor reviews your file and suggests you are exaggerating — maybe even faking. That single accusation can poison your claim, your treatment, and your reputation.

This article explains what malingering actually means, why genuine brain damage so often gets mistaken for it, how clinicians test for feigning, and how Missouri law decides whether a jury ever hears the accusation. If you are facing this fight, you deserve straight answers instead of labels.

Malingering means faking for gain — and it is a narrow claim

Malingering has a precise meaning. The standard psychiatric diagnostic manual defines it as the intentional production of false or grossly exaggerated symptoms, motivated by external incentives — money, avoiding work, escaping criminal responsibility. Three elements must line up: the symptoms are false or inflated, the person knows it, and an outside reward drives the behavior.

That definition matters because it sets a high bar. An expert who calls you a malingerer claims to know your intent. Intent is hard to prove from a test score. Honest mistakes, poor effort on a bad day, confusion, depression, and the brain injury itself can all produce results that look suspicious but are not fraud.

Keep one more distinction in view. Exaggeration is not the same as invention. A person can have a real traumatic brain injury and still overstate a symptom under stress. That combination does not erase the injury, and Missouri juries are allowed to sort the genuine from the inflated without throwing out the whole claim.

A normal scan does not rule out brain damage

Defense arguments often start with imaging: your CT looked fine, your MRI looked fine, so your brain must be fine. The premise is wrong. The Centers for Disease Control and Prevention explains that a traumatic brain injury results from a bump, blow, or jolt that disrupts normal brain function, and most TBIs are mild — the kind that routine emergency-room scans do not capture.

Standard CT and MRI scans excel at finding bleeding, skull fractures, and large structural damage. They routinely miss diffuse axonal injury, the microscopic shearing of nerve fibers that occurs when the brain shifts inside the skull. They also miss the metabolic and chemical disruptions that produce real cognitive symptoms. MedlinePlus, a National Institutes of Health service, describes the wide range of TBI symptoms — headaches, memory problems, mood changes, sleep disruption, difficulty concentrating — that can persist long after imaging reads normal.

So when an adjuster says "the scans were clear," the honest answer is: clear scans clear only what scans can see. A neurological examination, neuropsychological testing, and a documented symptom history carry the diagnostic weight that a film cannot.

Real brain injuries mimic the supposed signs of faking

The traits that adjusters and defense experts cite as red flags often come standard with a brain injury. Consider three.

First, inconsistency. A person with frontal-lobe damage can perform well on Monday and poorly on Wednesday. Fatigue, pain, poor sleep, and fluctuating attention all swing test results. Inconsistency across days is a symptom pattern, not a confession.

Second, flat affect and poor motivation. Injury to the brain's frontal systems can produce apathy, slowed initiation, and indifference toward tasks — including the very tests used to measure the injury. A patient who seems not to care about performing well may be displaying the injury, not faking it.

Third, irritability and odd behavior. Damage to the regions that regulate emotion and impulse control can make a survivor seem uncooperative or evasive in interviews. Jurors and claims reviewers who expect a brain-injured person to act like a flu patient misread these behaviors as attitude problems.

None of this means every inconsistent test result reflects injury. It means the surface clues cannot do the sorting. Something more rigorous has to.

Science, not suspicion, separates feigning from injury

Neuropsychology developed validated tools for exactly this problem. They fall into two families.

Performance validity tests measure whether a person is giving genuine effort. Many present tasks that look hard but are easy — so easy that people with severe, proven brain damage still pass them. Scoring below the cutoff raises a question about effort, not about character.

Symptom validity tests measure whether reported symptoms fit known patterns. They flag complaints that are more extreme, more numerous, or more bizarre than genuine patients typically report. Clinicians also use embedded validity indicators — effort checks hidden inside standard memory and attention tests — so a full evaluation produces many data points instead of one impression.

Two limits deserve emphasis, because honest experts concede them. First, a failed validity test shows invalid performance, not intent. Pain, medication, misunderstanding the instructions, and genuine cognitive collapse can all sink a score. The careful examiner rules out those explanations before using words like exaggeration. Second, professional standards expect multiple converging measures before anyone draws conclusions about effort. An expert who labels you after one short screening tool has outrun the science.

Missouri puts a gatekeeper between the jury and junk science

You do not have to accept whatever label a hired expert wants to attach to you. Missouri law makes the trial judge screen expert testimony before the jury hears it. Under RSMo § 490.065 — rewritten by the General Assembly in 2017 — an expert's opinion is admissible only if it rests on sufficient facts, grows out of reliable principles and methods, and reflects a reliable application of those methods to the facts. You can read the statute yourself at the Missouri Revisor of Statutes.

The Missouri Supreme Court enforced that gatekeeping duty before the 2017 amendment and continues to enforce it after. In Mitchell v. Kardesch, 313 S.W.3d 667 (Mo. banc 2010), the Court stressed that trial courts must test whether an expert's opinion is substantially supported, not merely asserted. In State v. Johnson, 524 S.W.3d 505 (Mo. banc 2017), the Court applied the amended statute's reliability factors — testability, peer review, known error rates, standards controlling the technique, and general acceptance — the same framework the United States Supreme Court announced in Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993), now codified in Federal Rule of Evidence 702.

This framework gives your attorney concrete ways to challenge a malingering opinion. Did the expert administer validated performance and symptom validity tests, or just eyeball your records? Does the method distinguish feigning from genuine impairment, or does it label anyone with inconsistent scores? Has the expert's interpretation been tested, published, and accepted, or is it a personal theory? And one more line of attack runs through Missouri evidence tradition: credibility belongs to the jury. An expert who testifies, in effect, "this witness is lying" trespasses on the jury's job, and courts have long limited opinions that do so.

The myths that hurt injured Missourians

Four myths drive most malingering accusations. Each one crumbles under scrutiny.

Myth: Everyone exaggerates once a lawsuit starts. The research literature on base rates is contested, and estimates vary widely by setting and method. No study justifies presuming that you, personally, are faking. A presumption of fraud is a litigation tactic, not a scientific finding.
Myth: Litigation causes post-concussion symptoms. Researchers have tested the idea that claims manufacture symptoms and found the relationship far weaker than the myth suggests. Many studies show symptoms persist after cases resolve, and most claimants keep treating after the money question closes.
Myth: Inconsistent scores prove lying. As explained above, variability is part of the injury. Genuine patients fluctuate; the testing literature expects it.
Myth: If you can work or shop, you cannot be injured. Mild and moderate TBI survivors often function in short bursts and pay for it later. A trip to the grocery store says nothing about whether you can sustain full-time concentration for eight hours a day, five days a week.

You will notice a pattern: each myth replaces measurement with suspicion. The validated-testing framework exists precisely because suspicion fails.

What to do if the insurer calls you a faker

You cannot control the accusation, but you can control the record. These steps protect both your health and your claim.

Treat consistently. See your doctors, follow recommendations, and keep appointments. Gaps in treatment hand the defense its easiest argument.
Describe symptoms honestly — including good days. Overstating your limits helps no one. Accurate reporting builds the credibility that wins cases.
Get a neuropsychological evaluation from a qualified clinician. A thorough evaluation with multiple validity measures answers the faking question with data instead of impressions.
Keep a symptom journal. Short, dated notes about headaches, memory lapses, fatigue, and lost activities create a contemporaneous record that is hard to dismiss.
Let your attorney handle the defense exam. Missouri practice has rules about independent medical examinations. An experienced personal injury attorney knows how to prepare you, what the examiner may ask, and how to challenge a report that exceeds the science.
Do not perform for surveillance. Insurers sometimes film claimants. Live your life honestly; the journal and the testing will explain what a thirty-second clip cannot.

Missouri follows pure comparative fault under RSMo § 537.765, which you can review at the Missouri Revisor of Statutes. Even when a defense succeeds in diminishing part of a claim, the statute reduces recovery by a percentage rather than barring it — one more reason an unsupported "faker" label should never end the conversation. And remember that Missouri's statute of limitations gives most injury claims a five-year window, so you have time to build the medical record carefully instead of rushing to settle under accusation.

Our firm's traumatic brain injury practice handles these disputes regularly, and the pattern is consistent: claimants who document, treat, and test carefully beat the label.

Common questions about malingering and brain injury

Can I have a real brain injury and still fail a validity test?

Yes. Severe pain, medication effects, poor sleep, language barriers, and genuine cognitive collapse can all depress performance-validity scores. A careful examiner investigates those explanations before drawing any conclusion about effort, and a single failed measure rarely settles the question.

Can the defense expert testify that I am lying?

Not in those words. Missouri courts treat credibility as the jury's exclusive job. An expert may describe test results and what they typically indicate, but an opinion that amounts to "this claimant is a liar" invites a motion to strike or exclude, and the 490.065 reliability framework gives the judge tools to keep it out.

What if my symptoms get worse instead of better?

Worsening symptoms are not proof of fraud. Post-concussion symptoms can evolve, and secondary problems — depression, sleep disorders, chronic headaches — often emerge months after the injury. Document the changes with your treating physicians so the record explains the trajectory.

Will my case be ruined if the defense raises malingering?

No. The accusation is common, and it is answerable. Consistent treatment, honest reporting, validated testing, and the gatekeeping rules of RSMo § 490.065 give your side a structured way to respond. Many juries react badly to unsupported attacks on an injured person's honesty.

Talk with a Missouri attorney who knows this fight

If an insurer or defense doctor has suggested you are exaggerating a brain injury, get advice before you give another statement or sit for another examination. Call Ott Law Firm at (314) 710-2740 or contact us online to discuss your situation. We represent injured Missourians from our St. Louis office.

This article is for informational purposes only and does not constitute legal advice, and it is not a substitute for professional legal advice about your specific situation. Every case is different, and past results do not guarantee future outcomes. Reading this page does not create an attorney-client relationship.

Malingering versus Brain Damage: Disentangling Myths and Misunderstandings