Which factor does NOT influence the assessment of personal trauma PTSD?

The assessment of personal trauma related to PTSD (Post-Traumatic Stress Disorder) largely hinges on the specifics of the traumatic experiences themselves rather than the length of a service member's military service. Length of service does not directly influence the psychological impact of trauma; instead, it is the nature and severity of the traumatic event and the circumstances surrounding it that are critical in evaluating PTSD.

Factors like the type of military discharge can provide context to a veteran's overall service experience and potential access to benefits, but they do not determine the psychological effects of trauma experienced during service. The credibility of the traumatic event and the presence of supporting evidence are crucial, as they help establish whether the event qualifies as a stressor that could lead to PTSD. Thus, they play a significant role in the assessment process.

In summary, while all the other options directly relate to the evaluation and understanding of an individual’s trauma and associated PTSD, the length of service is not a determining factor in assessing the psychological effects of trauma experienced by military personnel.