Which of the following is NOT a symptom of post-traumatic stress disorder (PTSD)?

The choice indicating an increased interest in outside activities is indeed not a symptom of post-traumatic stress disorder (PTSD). PTSD is characterized by symptoms related to re-experiencing traumatic events, avoidance behaviors, increased arousal, and negative changes in mood and cognition. When individuals experience PTSD, they often have intrusive memories of the trauma, nightmares, and severe anxiety.

Additionally, individuals with PTSD frequently exhibit avoidance behaviors, which can lead to a diminished interest in activities they once enjoyed, rather than an increased interest. Other symptoms, such as sleeplessness, memory problems, and loss of concentration, are more commonly reported in those suffering from PTSD as part of the heightened state of anxiety and stress that accompany the disorder. Hence, the correct answer highlights a behavior that contradicts the typical symptomatology observed in individuals suffering from PTSD.