Final answer:
The feature that is not associated with malingering is 'Family members are able to verify the consistency of symptoms.' This is not typical of malingering, as the individual may present inconsistent symptoms that family members cannot reliably verify.
Step-by-step explanation:
Malingering is defined as the intentional production of false or exaggerated symptoms motivated by external incentives such as avoiding military duty, avoiding work, obtaining financial compensation, evading criminal prosecution, or obtaining drugs. Among the given options, the incorrect feature of malingering is 'C. Family members are able to verify the consistency of symptoms'. This is not a typical feature of malingering because family members may also be misled by the individual, or they might be complicit in the fabrication of symptoms. Other hallmarks of malingering include intentionally produced or exaggerated symptoms, tampered medical records, and vague or poorly defined symptoms.
Option C is incorrect because malingering often involves presenting inconsistent symptoms that may not be verifiable by family members. By contrast, 'B. Medical records may have been tampered with or altered' is a possibility with malingering, as it involves deceit. Similarly, 'A. Findings are compatible with self-inflicted injuries', 'D. Symptoms are vague or ill defined', and 'E. History and examination do not yield complaints or problems' are all features that can be associated with malingering, as the individual is attempting to deceive or manipulate the medical assessment.