Performance Validity Expert Witnesses

Bossier City, Louisiana

Physical Therapy, Disability Evaluation - Functional Capacity Evaluation, FCE, physical therapy, impairment, disability, functional limitation, activities of daily living, loss of enjoyment of life activities, performance validity, pain behavior, motor vehicle accident, work injury, medical malpractice, fitness-for-duty, nursing home, fall

Dr. Allison is CEO and managing partner of Functional Capacity Experts, LLC and Disability Management Group, LLC. He is a doctor of physical therapy and certified DOT medical examiner. Licensed to practice in Louisiana since 1993. He has 24 years of clinical practice experience specializing in functional capacity evaluations (FCEs) for cases involving personal injury, workers' compensation, long term disability, and Social Security disability claims. He has performed more than 5,000 FCEs to more objectively quantify and qualify the severity of an individual's occupational disability, credibility of pain behavior, physical impairments with participation in basic activities of daily living, and loss of enjoyment of life activities. Dr. Allison was the lead author of the Functional Capacity Evaluation Best Practice Guidelines adopted by the American Physical Therapy Association in 2018. He was also an author of the Functional Capacity Evaluation and Disability Determination monogra...

Waverly, Nebraska

Neuropsychology, Forensic Psychology - brain injury, malingering, competency, PTSD, emotional distress, testamentary capacity, Fitness for Duty, cognitive Impairment, differential diagnosis, civil and criminal litigation, rebuttal evaluations, second opinions, record reviews, workers compensation, performance validity, symptom validity, mental capacity, personal injury

I am a neuropsychologist licensed in Nebraska, Iowa, Kansas, and South Dakota, specializing in the intersection of brain function and legal standards. With experience in an estimated 200+ testimonies on civil and criminal cases over 26 years of practice, I provide thorough, evidence-based, neuropsychological independent examinations that meet the standard of care and the Daubert standard for cases involving traumatic brain injury, cognitive impairment, and psychological disability. A full symptom/performance validity assessment is completed to rule-out suboptimal effort or malingering. I deliver clear, defensible expert opinions that withstand rigorous cross-examination and translate complex neuroscientific data into actionable insights for the court. I am available for nationwide travel for evaluations and testimony, as well as record reviews and second opinions.