https://www.sciencedaily.com/releases/2021/02/210225113320.htm

Intrusions are a core symptom of post-traumatic stress disorder. Images of the traumatic experience suddenly and uncontrollably re-enter consciousness, often accompanied by strong sensory impressions such as the sounds or certain smells at the scene of the trauma, sometimes even making patients feel as if they are reliving the trauma. "Patients appraise the fact that they are experiencing these intrusions very negatively; they are often afraid that it is a sign that they are losing their mind," explains Marcella Woud. "The feeling of having no control over the memories and experiencing the wide variety of intense negative emotions that often accompany intrusions make them even more distressing, which in turn reinforces negative appraisals."

A sentence completion task could help patients to reappraise symptoms