What is the difference between a treating clinician report and a forensic personal injury evaluation?

A treating clinician provides a factual account of their treatment of the client and their clinical observations. A forensic evaluator, by contrast, is retained specifically to answer psycholegal questions — typically causation, diagnosis, severity of impairment, and prognosis — and is expected to be objective and impartial rather than serving as the client's advocate. Treating clinicians should generally avoid offering forensic opinions about causation or damages because their dual role compromises objectivity, and their records were not created with litigation scrutiny in mind. If you are asked to provide a treating clinician letter, limit your opinions to what you have directly observed in treatment.

How do I determine whether the claimed psychological injury was caused by the incident versus a pre-existing condition?

Causation analysis requires reviewing pre-incident functioning through collateral records (prior therapy records, medical records, employment records, school records), comparing the client's baseline functioning to their post-incident presentation, and applying differential diagnosis to rule out alternative explanations. Key questions include: Did the client have a documented psychiatric history before the incident? If so, did the incident exacerbate the pre-existing condition, or is the current presentation a continuation of prior pathology? Were symptoms present immediately after the incident, or did they emerge later? Is the temporal relationship consistent with the claimed mechanism of injury? You must address the 'eggshell plaintiff' doctrine — a defendant takes the plaintiff as they find them, meaning pre-existing vulnerability does not negate causation if the incident triggered or worsened symptoms.

What malingering assessment measures should I use in a personal injury evaluation?

No single test can definitively diagnose malingering. Best practice is a multi-method approach: validity scales embedded in personality instruments (MMPI-3 validity scales including F, Fb, Fp, FBS, RBS), standalone symptom validity tests (TOMM, SIMS, M-FAST, SIRS-2), performance validity tests for cognitive claims (TOMM, WMT, MSVT), behavioral observations across the evaluation, and comparison of self-reported symptoms with observed functioning and collateral data. If validity indicators suggest non-credible responding, you must report this finding and explain its implications for diagnostic conclusions. Never diagnose malingering based on a single elevated scale.

Can I diagnose PTSD in a personal injury case if the incident does not meet DSM-5 Criterion A?

No. DSM-5 PTSD requires exposure to actual or threatened death, serious injury, or sexual violence (Criterion A). Many personal injury claims involve events that are distressing but do not meet this threshold — a fender-bender with no physical injury, a workplace conflict, or a slip-and-fall. If Criterion A is not met, you cannot diagnose PTSD regardless of the client's symptom presentation. Consider Adjustment Disorder or Other Specified Trauma- and Stressor-Related Disorder as alternative diagnoses. Always explicitly address whether Criterion A is met in your report and explain your reasoning.

How do I quantify psychological damages in my report?

Psychological damages are quantified through functional impairment analysis rather than subjective distress alone. Document specific impairments across life domains: occupational functioning (lost productivity, inability to perform job duties, career trajectory disruption), social and interpersonal functioning (relationship deterioration, social withdrawal), daily living activities (self-care deficits, inability to drive, avoidance of specific settings), recreational functioning (loss of previously enjoyed activities), and psychological suffering (pain and suffering, emotional distress, loss of enjoyment of life). Use pre- versus post-incident comparison to demonstrate the change in functioning attributable to the injury. Prognosis is also a damages element — state whether the impairment is expected to be temporary or permanent, and what treatment will be needed.

Personal Injury Psychological Report

Forensic & Legal|13 min read|Updated 2026-03-20|Clinically reviewed

What Is a Personal Injury Psychological Report?

A personal injury (PI) psychological report is a forensic document prepared by a psychologist to evaluate the psychological injuries a plaintiff claims to have sustained as a result of an incident — typically an accident, assault, workplace event, or medical malpractice. The report serves the trier of fact (judge or jury) by providing expert opinion on diagnosis, causation, severity of impairment, and prognosis.

Unlike clinical treatment documentation, a PI report is written for a legal audience. It must establish a clear causal link between the incident and the claimed psychological injuries, address pre-existing conditions, evaluate the credibility of the claimant's symptom presentation, and quantify damages in functional terms. The report will be subject to opposing expert review, Daubert or Frye admissibility challenges, and cross-examination. Every opinion must be supported by data and grounded in peer-reviewed methodology.

The psychologist's role in PI work is evaluative, not therapeutic. You are not the claimant's advocate. Your obligation is to answer the referral questions accurately and impartially, even when your findings are unfavorable to the retaining party.

When You Need It

A plaintiff's attorney retains you to evaluate their client's psychological injuries for civil litigation
A defense attorney or insurance carrier retains you to conduct an independent psychological evaluation (IPE) of the plaintiff
A client in your care is involved in litigation and the attorney requests a forensic evaluation (note: transitioning from treater to evaluator creates dual role problems and is generally discouraged)
Workers' compensation cases involving psychological injury claims that proceed to litigation
Motor vehicle accident claims involving PTSD, anxiety, depression, or other psychological conditions
Workplace harassment, discrimination, or hostile work environment claims with emotional distress damages
Medical malpractice claims alleging psychological harm from negligent treatment
Product liability cases involving psychological injury

Key Components

Identifying Information and Referral Context

State who referred the evaluation, what questions you were asked to address, and who is paying for the evaluation. Identify the claimant, their attorney, and the retaining party. Transparency about the referral context is essential for the court to assess potential bias.

Informed Consent and Notification

Document that the claimant was informed this is a forensic evaluation, not treatment; that there is no doctor-patient relationship; that the results will be shared with the retaining attorney and may be disclosed in court; and that confidentiality is limited. In defense-retained evaluations, document that the claimant was advised of the purpose and their right to decline participation.

Data Sources and Records Reviewed

List every data source: clinical interview dates and durations, psychological tests administered, collateral interviews conducted, and all records reviewed (medical records, prior therapy records, employment records, deposition transcripts, incident reports, police reports, imaging studies). This section establishes the foundation for your opinions.

Background and Pre-Incident History

Document developmental history, educational history, employment history, relationship history, substance use history, and — critically — pre-incident psychiatric and psychological history. Any prior diagnoses, treatment, medication use, psychiatric hospitalization, or functional limitations must be identified because they bear directly on causation.

Incident Description

Summarize the claimant's account of the incident. Note that this is the claimant's self-report and should be corroborated with objective records where possible.

Post-Incident Symptom Presentation

Document the onset, course, and current severity of claimed symptoms. Use DSM-5 diagnostic criteria as a framework. Assess functional impairment across domains: occupational, social, interpersonal, daily activities, and recreational.

Psychological Testing and Validity Assessment

Report test results with scores, including validity indicators. Address symptom validity directly — in forensic contexts, the credibility of self-reported symptoms must be formally assessed. Use embedded validity scales (MMPI-3, PAI) and standalone symptom validity tests (TOMM, SIRS-2, M-FAST). Report response style: valid, over-reported, under-reported, or non-credible.

Causation Analysis

This is the core forensic opinion. Address whether the incident caused, contributed to, or exacerbated the claimed psychological condition. Apply the "but for" and "substantial factor" causation standards as applicable to the jurisdiction. Address pre-existing conditions using the eggshell plaintiff doctrine and the aggravation/exacerbation distinction.

Diagnosis, Prognosis, and Treatment Recommendations

Provide DSM-5 diagnoses supported by the data. Offer a prognosis with a reasonable degree of psychological certainty. Recommend treatment with estimated duration and cost if requested by the retaining party.

Personal Injury Psychological Report — PTSD Following Workplace Accident

FORENSIC PSYCHOLOGICAL EVALUATION

Claimant: R.J.T., 43-year-old male Date of Evaluation: 03/12/2026 and 03/14/2026 Total Contact Time: 7.5 hours (5 hours face-to-face interview; 2.5 hours testing) Date of Report: 03/20/2026 Referral Source: Maria Gutierrez, Esq., plaintiff's counsel Evaluator: [Name], Psy.D., Licensed Psychologist, Board Certified in Forensic Psychology

Referral Questions:

Does R.J.T. meet diagnostic criteria for a psychological disorder?
If so, was the diagnosed condition caused by the workplace accident of 06/15/2025?
What is the severity of psychological impairment?
What is the prognosis and recommended treatment?

Notification of Purpose: R.J.T. was informed at the outset that this is a forensic evaluation, not a therapeutic relationship; that the evaluation was requested by his attorney; that this evaluator would prepare a written report to be provided to his attorney; that the report and this evaluator's opinions may be disclosed in depositions, court hearings, and trial proceedings; and that confidentiality is limited to the forensic context. R.J.T. verbalized understanding and consented to proceed.

Records Reviewed:

Emergency department records, Memorial General Hospital, 06/15/2025
Orthopedic surgery records, Dr. Steven Liang, 06/2025-09/2025
Primary care records, Dr. Anil Kapoor, 2019-2026
Employment file, Consolidated Manufacturing, Inc., 2014-2025
Psychotherapy records, Dr. Emily Weston, LCSW, 09/2025-present (14 sessions)
OSHA Incident Investigation Report, 06/15/2025
Deposition transcript of R.J.T., 01/22/2026
Deposition transcript of James Ferraro (co-worker and eyewitness), 01/28/2026
Photographs of industrial press and accident scene

Psychological Testing Administered:

MMPI-3
Trauma Symptom Inventory-2 (TSI-2)
Test of Memory Malingering (TOMM)
Structured Inventory of Malingered Symptomatology (SIMS)
Beck Depression Inventory-II (BDI-II)
PCL-5 (PTSD Checklist for DSM-5)
Montreal Cognitive Assessment (MoCA)

Validity Assessment: TOMM Trial 1: 48/50; Trial 2: 50/50 — above floor performance, indicating adequate effort. SIMS Total Score: 8 — below the cutoff of 14, not suggestive of malingered psychopathology. MMPI-3 validity scales: F = 72T (mildly elevated, consistent with genuine distress in clinical populations); Fp = 52T (within normal limits); FBS = 68T (within acceptable range); RBS = 61T (within normal limits); L = 45T; K = 42T. Overall validity profile is consistent with a credible symptom presentation. No indicators of over-reporting, under-reporting, or feigned psychopathology.

Pre-Incident Psychiatric History: Review of primary care records from 2019 to 2025 reveals no psychiatric diagnoses, no psychotropic medication prescriptions, and no mental health referrals. R.J.T. denied any prior psychiatric treatment, psychiatric hospitalization, or psychological evaluation. Employment records show no disciplinary actions, no accommodations, and consistently positive performance reviews over an 11-year tenure. R.J.T. described his pre-incident functioning as "normal — I worked, came home, spent time with my kids, went fishing on weekends." There is no documented evidence of pre-existing psychological pathology.

Incident Summary: On 06/15/2025, R.J.T. was operating an industrial hydraulic press when a mechanical safety guard failed, resulting in the press activating while his left hand was in the compression zone. R.J.T. sustained a crush injury to his left hand, including comminuted fractures of the third and fourth metacarpals, extensor tendon lacerations, and significant soft tissue damage. He was transported by ambulance to Memorial General Hospital, underwent emergency surgery that day, and required a second reconstructive surgery on 07/03/2025. He was unable to return to work and was placed on short-term disability effective 06/16/2025.

Current Symptom Presentation: R.J.T. meets full DSM-5 diagnostic criteria for Posttraumatic Stress Disorder (F43.10):

Criterion A: Directly experienced serious physical injury (crush injury with threatened loss of limb)
Criterion B (Intrusion): Recurrent intrusive memories of the accident (daily), nightmares of the press activating (3-4 nights per week), intense psychological distress when hearing loud mechanical sounds or hydraulic noises, physiological reactivity (sweating, tachycardia) when driving past the factory
Criterion C (Avoidance): Avoids the factory and surrounding neighborhood, avoids watching television programs showing industrial or mechanical equipment, refuses to enter his garage where power tools are stored
Criterion D (Negative cognitions/mood): Persistent self-blame ("I should have checked the guard"), markedly diminished interest in activities (stopped fishing, stopped attending his children's sports events), feelings of detachment from his wife and children, persistent inability to experience positive emotions
Criterion E (Arousal/reactivity): Hypervigilance in public spaces, exaggerated startle response (particularly to sudden loud noises), difficulty concentrating, chronic insomnia (3-4 hours per night), irritability with verbal outbursts toward family members

Functional Impairment:

Occupational: Unable to return to prior position as machine operator. Reports he "cannot imagine going near a press again." Beyond the physical limitations of his left hand, his avoidance of industrial settings, hypervigilance, and concentration difficulties would preclude work in any manufacturing environment.
Social/Interpersonal: Has withdrawn from friendships, stopped attending his children's baseball games, reports marital conflict due to irritability and emotional numbness. Wife reports he "is not the same person."
Daily Activities: Avoids driving past the factory, will not use power tools, difficulty with sleep, decreased appetite with 18-pound weight loss since the accident.
Recreational: Has not fished, his primary recreational activity, since the accident. Reports no interest in previously enjoyed activities.

Causation Opinion: Within a reasonable degree of psychological certainty, R.J.T.'s Posttraumatic Stress Disorder was directly caused by the workplace accident of 06/15/2025. This opinion is based on the following: (1) there is no evidence of any pre-existing psychiatric condition or psychological impairment; (2) symptom onset was temporally immediate, with intrusive re-experiencing and avoidance symptoms beginning within days of the accident; (3) symptom content is directly related to the accident (nightmares of the press, avoidance of industrial settings, reactivity to mechanical noises); (4) the clinical presentation is consistent with the expected psychological sequelae of a sudden, life-threatening industrial accident involving mutilating physical injury; and (5) symptom validity testing supports a credible, non-feigned presentation.

Diagnoses:

Posttraumatic Stress Disorder (F43.10) — caused by workplace accident of 06/15/2025
Major Depressive Disorder, Single Episode, Moderate (F32.1) — secondary to PTSD and functional losses

Prognosis: Guarded. Without treatment, PTSD symptoms are likely to persist and may worsen. With evidence-based treatment (Prolonged Exposure or Cognitive Processing Therapy), approximately 50-60% of individuals with chronic PTSD achieve clinically meaningful symptom reduction. R.J.T.'s prognosis is complicated by ongoing litigation, chronic pain, and occupational displacement. Full return to pre-incident functioning is unlikely. I estimate R.J.T. will require 16-24 sessions of trauma-focused psychotherapy, continued psychiatric medication management, and may benefit from vocational rehabilitation.

This is a sample for educational purposes only — not real patient data.

How to Write It Step by Step

Step 1: Clarify the referral questions. Before conducting the evaluation, confirm exactly what the retaining attorney needs you to address. Typical questions include diagnosis, causation, severity of impairment, prognosis, and treatment recommendations. Do not exceed the scope of the referral unless additional findings are clinically significant.

Step 2: Obtain and review all relevant records before the clinical interview. Review medical records, prior psychiatric and therapy records, employment records, the incident report, deposition transcripts, and any other available documentation. This allows you to identify inconsistencies, establish pre-incident baseline functioning, and prepare targeted interview questions. Never rely solely on the claimant's self-report.

Step 3: Conduct a thorough forensic interview. This is not a therapy intake. Cover developmental history, educational history, employment history, relationship history, substance use history, pre-incident psychiatric history, the incident itself, post-incident symptom development, current symptom presentation, and functional impairment across all life domains. Ask about secondary gain and litigation stress directly.

Step 4: Administer psychological testing with validity measures. In forensic contexts, symptom validity assessment is not optional. Use a comprehensive personality instrument with embedded validity scales (MMPI-3 or PAI), at least one standalone symptom validity test, and disorder-specific measures relevant to the claimed condition (PCL-5 for PTSD, BDI-II for depression). Report all scores, including validity indicators.

Step 5: Conduct the causation analysis. This is the most important forensic opinion. Compare pre-incident functioning to post-incident functioning. Identify pre-existing conditions and determine whether the incident caused a new condition, exacerbated a pre-existing condition, or is unrelated to the claimed symptoms. Address temporal relationship, symptom content, and alternative explanations.

Step 6: Write the report for a legal audience. Use clear, jargon-free language. Explain psychological concepts in terms a judge or jury can understand. Every opinion must be supported by cited data from the evaluation. Avoid advocacy language — present findings objectively and let the data support your conclusions.

Step 7: State opinions within a reasonable degree of psychological certainty. This is the legal standard for expert opinion. Qualify any opinion that does not meet this threshold. If the data are insufficient to answer a referral question, say so explicitly rather than speculating.

Common Mistakes

Failing to assess for malingering. In personal injury litigation, the claimant has a financial incentive to appear more impaired than they are. Failing to administer symptom validity tests — or administering them and failing to report the results — undermines the credibility of your entire evaluation. Every PI report must address response validity.
Ignoring or minimizing pre-existing conditions. The most common basis for opposing expert rebuttal is unaddressed pre-existing pathology. If the claimant had a prior history of depression and you diagnose depression without discussing whether the incident caused a new episode versus a continuation of prior illness, your report is vulnerable. Address pre-existing conditions directly, even if your ultimate opinion is that the incident caused an exacerbation.
Confusing clinical causation with legal causation. A treating therapist might say "the client's PTSD is related to the accident" based on the client's self-report. A forensic evaluator must demonstrate causation through independent data: pre-incident records, temporal relationship, symptom specificity, differential diagnosis, and ruling out alternative explanations. "The client told me the accident caused their symptoms" is not a causation analysis.
Providing opinions beyond your data. If you were retained to evaluate PTSD but the claimant also mentions chronic pain, do not offer opinions about pain-related disability unless you have the training, data, and assessment tools to support that opinion. Stay within your scope of competence and the scope of the referral.
Writing in advocacy language. Phrases like "this poor man suffered tremendously" or "the defendant's negligence clearly caused" signal bias. Your report should read like a scientific document, not a legal brief. Present findings objectively. If the data support the plaintiff's claim, the objective presentation will speak for itself.