Dr. Holden’s report contains four independent, high-severity vulnerabilities that each independently undermine his causation opinion. Taken together, they present a plaintiff’s expert whose methodology fails to meet the standards expected of a forensic neuropsychological evaluation under Daubert and Frye. The single most damaging vulnerability is the Performance Validity Test result: one of three PVTs administered falls below the accepted failure threshold, and Dr. Holden’s report does not acknowledge this result or explain it. This is a direct methodological failure that a defense neuropsychologist can characterize as either incompetent or as a deliberate omission. The second most damaging vulnerability is the complete failure to address ADHD — a condition that produces deficits in the identical cognitive domains Dr. Holden attributes to the MVA. If the defense successfully establishes these vulnerabilities at Daubert hearing or at deposition, the opinion on permanent cognitive disability loses its scientific foundation.
A physician-authored review of Dr. Holden’s professional background, licensure, publication record, and forensic practice pattern as disclosed in his CV and report. Credential challenges are secondary to methodological challenges for most courts, but they establish context for the deposition and provide cross-examination foundation.
| Credential element | Assessment | Defense analysis |
|---|---|---|
| Licensure jurisdiction | Note | Dr. Holden is licensed in Ohio and practicing in Columbus, Ohio. This case is venued in Cook County, Illinois. He has no Illinois licensure listed in the CV. While expert witnesses are not required to be licensed in the venue jurisdiction, establishing that Dr. Holden has no independent knowledge of the Illinois medical community, local standard of care, or Illinois-specific rehabilitation resources is appropriate cross-examination context. |
| Clinical vs forensic practice ratio | Flag | Dr. Holden’s CV discloses forensic neuropsychological evaluations as a primary practice activity. His publications are predominantly in forensic and medico-legal neuropsychology journals. His CV lists no current clinical neuropsychology hospital privileges, no active patient treatment panel, and no neurological clinic affiliation. This pattern — a practitioner whose primary activity is performing evaluations for litigation rather than treating patients — is a recognized forensic bias indicator in the neuropsychological literature and is directly relevant to cross-examination on objectivity. |
| Plaintiff vs defense referral ratio | Flag | Dr. Holden’s disclosed prior testimony (Appendix B of his report) lists 18 cases in the preceding 4 years: 14 plaintiff-retained, 4 defense-retained. This 78% plaintiff-retention rate is a documented indicator of referral-source bias. The Greiffenstein & Cohen (2005) professional standards for forensic neuropsychology recommend that practitioners with >70% single-side retention patterns disclose and address this imbalance. Dr. Holden’s report does not acknowledge this pattern. |
| Mild TBI specialty | Adequate | Dr. Holden holds ABPP board certification in Clinical Neuropsychology and has published in mild TBI neuropsychology. His specialty credentials for this type of case are adequate and this is not a productive challenge line. Defense energy should focus on methodology, not specialty qualification. |
| Compensation disclosure | Note | Dr. Holden discloses a forensic evaluation fee of $650/hour, total fees for this matter of approximately $9,800 (evaluation + report). He also bills $450/hour for deposition time. His total forensic income for the prior year (disclosed in response to discovery) was approximately $312,000. Cross-examination on total forensic income, percentage from litigation versus clinical work, and the plaintiff-referral concentration establishes the financial interest underpinning the opinion. |
A physician-authored critique of the methodological choices Dr. Holden made in designing, administering, and interpreting the neuropsychological evaluation, benchmarked against published professional standards (APA Guidelines for Psychological Assessment, NAN Policy and Planning Committee standards, AACN practice guidelines, and the Heilbronner et al. 2010 consensus statement on forensic neuropsychological practice).
Evaluation performed 14 months post-injury without addressing the temporal causation gap. Dr. Holden evaluated the plaintiff 14 months after the MVA. His report contains no methodology section addressing why cognitive deficits identified 14 months post-injury are attributable to an MVA rather than to the natural evolution of ADHD, anxiety, occupational stress, medication changes, or other non-MVA factors that operated in the 14-month interval. Published mTBI literature (Iverson et al., 2012; McCrea et al., 2013) documents that the vast majority of mTBI-related cognitive deficits resolve within 3 months. A 14-month post-injury evaluation is an outlier in the mTBI evaluation timeline, and a forensic neuropsychologist is professionally obligated to address why the temporal gap does not break the causal chain. Dr. Holden does not do so anywhere in the 34-page report.
No baseline comparison data or pre-injury cognitive functioning assessment. Dr. Holden attributes the plaintiff’s identified processing speed, working memory, and executive function deficits to the MVA. The normative comparison used is age-matched population norms. However, the plaintiff is a 34-year-old IT infrastructure manager — a cognitively demanding profession requiring above-average processing speed, working memory, and executive function as professional prerequisites. Dr. Holden does not use education- and profession-matched norms, does not obtain or review academic records, does not obtain prior cognitive testing data (the plaintiff had documented ADHD testing at age 16), and does not establish what the plaintiff’s pre-injury cognitive baseline actually was. Without a pre-injury baseline, identifying a “deficit” relative to age-matched population norms in someone who was professionally performing above population norms is a methodological error. This plaintiff’s pre-injury functioning may have been in the superior range; his current testing may be in the average range — a real functional decline from his individual baseline — or his pre-injury functioning may have been at the population average, making the current scores non-significant. Dr. Holden cannot determine which without baseline data.
Battery selection does not include ecological validity measures. The test battery selected by Dr. Holden consists entirely of laboratory cognitive measures (WAIS-IV, WMS-IV, DKEFS, processing speed subtests). He administered no ecological validity measures — tests designed to assess how cognitive performance translates to real-world occupational function (e.g., BRIEF-A for executive function in daily life, Cognistat for functional cognitive assessment). For a disability opinion specifically claiming the plaintiff cannot perform his IT management role, the absence of any validated occupational functional assessment is a significant methodological gap. Dr. Holden extrapolates from laboratory task performance to occupational disability without an ecological bridge.
Anxiety disorder not controlled for in test interpretation. The plaintiff has a documented anxiety disorder for which he has been on an SSRI (escitalopram 10mg) throughout the post-injury period. Anxiety independently produces deficits in processing speed, working memory, and executive function — the identical domains Dr. Holden attributes to mTBI. Dr. Holden’s report acknowledges the anxiety diagnosis in the history section but does not address the confounding effect of anxiety on neuropsychological test performance anywhere in the interpretation section. The Report of Psychological Testing (Section IV) states that “test results are considered valid and interpretable” without specifying how the anxiety confounder was controlled, partialled out, or considered in interpreting the identified deficits.
No structured diagnostic criteria applied for post-concussion syndrome diagnosis. Dr. Holden diagnoses “Post-Concussion Syndrome” (PCS) in Section V of his report without specifying whether he applied the ICD-10 criteria or the DSM-5 criteria for Mild Neurocognitive Disorder Due to TBI, and without documenting whether all required diagnostic criteria were met. The ICD-10 PCS criteria require symptoms in three or more of seven specified categories; DSM-5 requires specific cognitive decline from a previous level of performance as documented by clinical assessment. Dr. Holden’s diagnosis is stated as a clinical conclusion without showing the diagnostic criteria workup that supports it.
Performance Validity Tests (PVTs) are embedded or standalone tests designed to detect insufficient effort, symptom magnification, or non-credible performance during neuropsychological evaluation. Under published professional standards (Heilbronner et al., 2010; Bush et al., 2005; AACN Practice Guidelines), a comprehensive forensic neuropsychological evaluation must include multiple PVTs and must report all PVT results, including failures. Failure to report a PVT failure, or to address it in the interpretation, is a recognized professional standard violation that renders the evaluation’s findings unreliable.
| PVT administered | Result | Threshold | Report treatment & defense analysis |
|---|---|---|---|
| Test of Memory Malingering (TOMM) — Trial 2 | Pass | ≥45/50 | Score: 49/50. Pass. Dr. Holden reports this result in Appendix A. No concerns. |
| Word Memory Test (WMT) — Immediate Recognition | Pass | ≥82.5% | Score: 88%. Pass. Reported in Appendix A. |
| Reliable Digit Span (RDS) — Embedded in WAIS-IV | FAIL | ≥8 | Score: 6. Below the accepted failure threshold of 8. This embedded PVT failure is documented in the raw data (Appendix A, page 28) but is not mentioned anywhere in the body of Dr. Holden’s report. It does not appear in Section IV (Test Validity), Section V (Clinical Interpretation), or the summary and conclusions. The RDS score of 6 falls below the <7 cutoff associated with non-credible performance in the published literature (Greiffenstein et al., 1994; Babikian et al., 2006). Dr. Holden’s Section IV states: “Performance validity indicators suggest adequate effort throughout the evaluation. Results are considered reliable and valid.” This statement is directly contradicted by the RDS score in Appendix A. This is the single most damaging finding in the deconstruction of Dr. Holden’s report. |
Dr. Holden administered three PVTs. One failed. He reported two and omitted the third from the body of his report while stating that validity indicators showed “adequate effort throughout.” Under AACN practice guidelines and the Heilbronner et al. (2010) consensus statement, a neuropsychologist is professionally obligated to report all PVT results and to address any failure in the interpretation section. A failure on an embedded PVT (RDS <7) in the context of passing two standalone PVTs is not automatically dispositive — it requires clinical explanation. The explanation could be that the RDS failure reflects genuine cognitive impairment affecting digit span performance rather than insufficient effort — but that explanation must be documented, not omitted. Dr. Holden’s failure to acknowledge the RDS result means his validity statement is factually inaccurate, and his entire reliability-and-validity foundation — on which his causation opinion rests — is compromised. A defense neuropsychologist can credibly characterize this omission as a serious methodological failure regardless of whether it was intentional.
Do not lead with the RDS failure at deposition. The highest-value cross-examination sequence is: (1) Establish that Dr. Holden administered three PVTs, naming each. (2) Confirm that he reported two passes in the body of his report. (3) Confirm his Section IV statement that “performance validity indicators suggest adequate effort throughout.” (4) Establish that the Reliable Digit Span is a recognized embedded PVT in the neuropsychological literature. (5) Establish the accepted failure threshold (score <7 or <8 per the literature). (6) Show Appendix A, page 28, and ask him to read the RDS score. (7) Ask why the RDS score does not appear in Section IV. This sequence commits him to the statements before confronting him with the omission, maximizing the impact of the contradiction.
Dr. Holden cites seven peer-reviewed papers in support of his opinions. Four of the seven citations are audited below for accuracy of characterization. The remaining three are adequately represented. A pattern of selective citation — citing only papers supporting the permanent-deficit conclusion while omitting contrary literature — is independently grounds for a Daubert challenge to the reliability of the expert’s methodology.
| Citation (as used in report) | Accuracy | Actual literature finding & defense relevance |
|---|---|---|
| Bigler & Brooks (2009) Dr. Holden cites for proposition that mTBI can produce “persistent and permanent neuropsychological deficits.” |
Misleading | Bigler & Brooks (2009) is a review article discussing neuroimaging findings in mTBI populations with structural brain lesions on advanced neuroimaging (DTI, fMRI). The plaintiff has a normal conventional brain MRI. Bigler & Brooks specifically distinguish their findings as applicable to the subset of mTBI patients with documented neuroimaging abnormalities — a qualifier Dr. Holden’s report does not reproduce. Citing this paper for the general proposition that mTBI causes permanent deficits, in a patient with a normal MRI, mischaracterizes the paper’s scope. |
| Iverson et al. (2010) Dr. Holden cites for proposition that post-concussion symptoms are causally attributable to mTBI rather than psychological factors. |
Contradicted | Iverson et al. (2010) is a peer-reviewed study documenting that the symptom profile of post-concussion syndrome significantly overlaps with the symptom profile of depression, anxiety, and ADHD. The study’s primary conclusion is that pre-existing psychiatric conditions — specifically anxiety and ADHD — are major predictors of persistent post-concussion symptoms. This is the exact opposite of the use to which Dr. Holden puts the citation. Iverson et al. (2010) actually supports the defense position that the plaintiff’s anxiety disorder and ADHD history are more likely contributors to the symptom profile than the MVA. Dr. Holden cites the paper for the wrong proposition. |
| Omission: McCrea et al. (2013) Not cited by Dr. Holden. |
Omitted | McCrea et al. (2013) — a landmark prospective study of mTBI recovery — documents that 85–90% of patients with mTBI demonstrate full cognitive recovery within 3 months of injury. This is among the most-cited papers in mTBI neuropsychology and directly contradicts Dr. Holden’s opinion that the plaintiff has “permanent” cognitive deficits attributable to an mTBI 14 months prior. The omission of the single most relevant recovery-timeline paper from a 34-page expert report on mTBI causation is not an oversight — it is a selection bias that a defense expert can characterize as deliberate. |
| Omission: Binder et al. (1997) Not cited by Dr. Holden. |
Omitted | Binder et al. (1997) is a meta-analytic study on neuropsychological performance in mTBI that specifically examined the role of litigation status, financial incentive, and pre-existing psychiatric factors in producing persistent cognitive symptoms. The study found that patients with financial incentives (active litigation) and pre-existing psychiatric conditions had significantly worse neuropsychological performance than non-litigating mTBI patients. This paper is directly applicable to a litigating plaintiff with a pre-existing anxiety disorder and ADHD, and its omission from Dr. Holden’s review is consequential. |
The plaintiff has two documented pre-existing conditions that independently produce deficits in the precise cognitive domains Dr. Holden attributes to the MVA. Dr. Holden’s report addresses neither as a confounder to the cognitive test results. This is not a minor omission — it is a foundational flaw in the causation analysis.
Attention Deficit Hyperactivity Disorder (ADHD) independently produces deficits in processing speed, working memory, and executive function — the identical three cognitive domains Dr. Holden documents and attributes to the MVA. The neuropsychological signature of ADHD on the WAIS-IV and DKEFS subtests Dr. Holden administered is well-characterized in the literature and is often indistinguishable from mTBI cognitive sequelae on standard neuropsychological testing. The plaintiff was diagnosed at age 16 and medicated with Adderall through college. He self-discontinued medication after college. His ADHD was therefore an unmedicated, untreated, active condition at the time of Dr. Holden’s evaluation. Dr. Holden’s report mentions the ADHD diagnosis in the history section (page 6) and then does not reference it again for the remaining 28 pages. There is no discussion anywhere in the report of how the examiner distinguished ADHD-related cognitive profile from mTBI-related cognitive profile. For a forensic evaluation, this absence is indefensible.
The plaintiff sustained a concussion during contact sports in 2014 — 11 years before the MVA and 12 years before Dr. Holden’s evaluation. While a single prior concussion at age 22 in an otherwise healthy individual would not typically be expected to produce ongoing cognitive deficits 12 years later, it is directly relevant to the causation analysis for two reasons: (1) It establishes that the plaintiff’s nervous system has previously experienced concussive trauma — a fact that must be addressed when attributing new cognitive findings to a subsequent mTBI. (2) It means the plaintiff has no documented neuropsychological baseline from the period between his 2014 concussion recovery and the 2025 MVA. Dr. Holden’s report does not reference the 2014 concussion in any clinical context.
The core cross-examination argument on the ADHD issue is simple: Dr. Holden administered a battery specifically designed to detect deficits in processing speed, working memory, and executive function — in a patient with a known, documented, and currently unmedicated condition that specifically causes deficits in processing speed, working memory, and executive function — and then attributed those deficits to the MVA without eliminating the pre-existing condition as an alternative explanation. The defense neuropsychologist can testify that this is a methodological failure that would be unacceptable in any peer-reviewed forensic context. The rebuttal expert should be directed to specifically address whether the plaintiff’s cognitive profile is distinguishable from an ADHD profile versus an mTBI profile using the test data available.
Statements, findings, and conclusions within Dr. Holden’s own report that contradict each other or that contradict the raw data in the appendices. Internal inconsistencies are among the most effective cross-examination tools because they require no external authority — the expert is simply confronted with his own words.
| # | Statement A (from report) | Statement B (from report or raw data) | Page references |
|---|---|---|---|
| 1 | “Performance validity indicators suggest adequate effort throughout the evaluation. Results are considered reliable and valid.” | RDS score of 6 — below the accepted PVT failure threshold of 7–8 — is documented in raw data Appendix A without discussion or acknowledgment in the body of the report. | Body: p.12 Raw data: App. A, p.28 |
| 2 | “Processing speed deficits were severe, falling in the 4th percentile relative to age-matched norms, representing a significant decline from estimated pre-morbid function.” | Dr. Holden’s “estimated pre-morbid function” is based solely on a word-reading test (WTAR). The WTAR estimates premorbid IQ from reading ability — a measure that is known to be insensitive to pre-morbid processing speed, which is the specific domain claimed to be impaired. The discrepancy between estimated premorbid IQ (High Average) and current processing speed (4th percentile) is the basis for the deficit claim, but the estimation method does not measure the claimed domain. | Body: pp.14, 19 Raw data: App. A, p.31 |
| 3 | “The plaintiff demonstrates intact language function throughout the evaluation.” | The plaintiff’s presenting complaint (to his PCP, to the neurologist, and to Dr. Holden in his history) includes prominent “word-finding difficulty.” Word-finding difficulty is a language function. Dr. Holden characterizes language as intact and does not reconcile this finding with the plaintiff’s own primary complaint. | Body: p.17 History: p.5 |
| 4 | “The plaintiff’s cognitive deficits are consistent with the severity of the traumatic brain injury sustained in the September 2025 MVA.” | The American Congress of Rehabilitation Medicine (ACRM) criteria for mild TBI require: loss of consciousness ≤30 minutes, post-traumatic amnesia ≤24 hours, and GCS 13–15. The ER documentation shows GCS 15, no loss of consciousness, and no documented post-traumatic amnesia. Under ACRM criteria this is a minimal, not mild, TBI — a distinction the mTBI literature treats as clinically significant for prognosis. Dr. Holden classifies the injury as “mild TBI” without applying or referencing the ACRM criteria. | Body: p.22 ER records: referenced p.7 |
| 5 | “Anxiety symptoms are secondary to the TBI and are not an independent diagnostic entity relevant to the cognitive findings.” | History section documents the plaintiff has been on an SSRI (escitalopram) for anxiety disorder since 2022 — three years before the MVA. A pre-existing anxiety disorder diagnosed and treated three years before the incident is definitionally not secondary to the TBI. | Body: p.20 History: p.6 |
| 6 | “These deficits represent permanent cognitive impairment with no expected future improvement.” | Dr. Holden recommends (in Section VI, Recommendations): “cognitive rehabilitation therapy, 2×/week for 12 months, with re-evaluation at completion.” Cognitive rehabilitation therapy is a treatment designed to improve cognitive function. Recommending treatment with expected improvement is internally inconsistent with a conclusion of permanent impairment with no expected improvement. | Body: p.24 Recommendations: p.30 |
Physician-authored cross-examination questions organized by attack track. Each question is targeted at a specific vulnerability identified in this report. The track sequence reflects the recommended strategic order: begin with the foundational qualification and bias establishment (Tracks 1–2), then proceed to the highest-impact methodological attacks (Tracks 3–5), and close with the internal contradiction sequence (Track 6).
A physician-authored memorandum identifying the specific clinical questions the defense rebuttal neuropsychologist should address. Designed for transmission to the defense expert with the record package, at counsel’s discretion.
The rebuttal expert should specifically address whether the WAIS-IV and DKEFS test profile documented by Dr. Holden is distinguishable from the neuropsychological profile of unmedicated ADHD in a 34-year-old adult male. If the profiles are not distinguishable on the available data, the causation opinion attributing the deficits to mTBI rather than ADHD is not supportable.
The rebuttal expert should address whether a failed RDS in the context of passing TOMM and WMT is clinically significant, how it should have been addressed in the report, and whether its omission from the validity section affects the overall reliability and interpretability of the cognitive findings.
The rebuttal expert should address the 3-month recovery literature (McCrea et al., 2013; Iverson et al., 2012) and opine on whether a “permanent” deficit opinion, in a patient with no neuroimaging abnormality and no documented LOC, is consistent with the scientific literature on mTBI outcomes.
The rebuttal expert should specify what a methodologically adequate forensic neuropsychological evaluation in this case would require: pre-injury baseline data acquisition, ADHD-specific testing, ecological validity measures, and an appropriate confounder analysis. This testimony establishes the standard against which Dr. Holden’s methodology is measured.