The Assessment of Symptom and Performance Validity in Neurorehabilitation.

Rehabilitation professionals provide valuable clinical services to persons who have sustained neurologic injuries and illnesses. Accurate diagnosis and treatment planning require that neurorehabilitation professionals base their decisions on true information and genuine patient performance. That is, the patient must have responded honestly to questions and put forth adequate effort on ability measures. When in possession of valid information about the patient's history, symptoms, and abilities levels, clinicians are well positioned to serve the patient. In contrast, inaccurate information and invalid functional presentations lead to misdiagnosis, unhelpful or potentially harmful interventions, and wasted resources. Ethically, consistent with the principles of beneficence and justice, clinicians have a responsibility to use the assessment measures and procedures that are needed to answer clinical questions and provide appropriate services, using and conserving valuable resources in the process. With validity assessment measures and procedures comprising an important part of clinical evaluations, a formal, structured approach to validity assessment promotes ethical practice. Interdisciplinary collaboration in validity assessment in neurorehabilitation contexts can often be more thorough and efficient than evaluations performed by a single discipline.