Which of the following symptoms is indicative of post-traumatic stress disorder (PTSD)?

The symptom that signifies post-traumatic stress disorder (PTSD) is a marked decrease in interest or pleasure in activities, which is known as anhedonia. This symptom reflects a common experience among individuals suffering from PTSD, where they may find it difficult to engage in or enjoy activities that they previously liked. This loss of interest can stem from the emotional numbing that often accompanies PTSD, as the individual struggles to process the traumatic experience and may withdraw from social interactions and activities.

In addition, avoidance of reminders of the trauma is a significant symptom of PTSD, which includes avoiding situations, places, or people that can trigger memories of the trauma. However, while this symptom contributes to the overall profile of PTSD, it was not selected as the correct answer here. Instead, the marked decrease in interest directly highlights a more internal experience often associated with PTSD and aligns with the symptom criteria set forth in diagnostic manuals.

The symptoms of excessive and uncontrollable worry are more indicative of anxiety disorders rather than PTSD. Manic episodes are associated with bipolar disorder and are not typically relevant to PTSD, as PTSD does not involve the extremes of mood characteristic of mania. Therefore, focusing on loss of interest, we find a clear link to the emotional and psychological ramifications of traumatic experiences,