Question: A 27-year-old patient is referred for psychiatric evaluation after coworkers report episodes in which the patient appears to become "a different person," speaking in a different tone and demonstrating markedly different mannerisms. The patient reports frequent gaps in memory and occasionally finds personal belongings they do not recognize purchasing. During the interview, the patient appears distressed and confused by these experiences and denies any external incentives such as financial gain, avoidance of legal consequences, or disability claims. Collateral information from family confirms abrupt behavioral changes and episodes of amnesia. Neurological and substance-related causes have been excluded. Which of the following clinical features would most strongly support a diagnosis of dissociative identity disorder rather than malingering? Need Assignment Help? Variable symptom presentation across interviews Presence of psychosocial stressors Reluctance to discuss symptoms Involuntary identity shifts accompanied by amnesia