Measuring post‐traumatic stress: A psychometric evaluation of symptom‐ and coping questionnaires based on a Norwegian sample

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Abstract
The purpose of this study was to evaluate the psychometric characteristics of the Norwegian versions of the Impact of Event Scale, the Post Traumatic Stress Scale‐10 item version and General Coping Questionnaire‐30 item version. A group of 40 male and 56 female medical students was tested one week and four months after having started dissection of cadavers for the first time. The results showed that all scales had good internal consistency and test–retest reliability. The student sample scored lower on the IES and PTSS‐10 than comparable groups of traumatized subjects. A gender difference emerged, with female subjects scoring higher than male subjects. The factor analysis of the instruments indicated good construct validity for the symptom scales. The analysis of content validity related to DSM IV criteria indicated that the IES and PTSS‐10 may have some limitations in their predictive validity of PTSD. Taken together, the three scales have shown good psychometric properties and could be used in future research and clinical work.

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