A newly developed Dutch-language questionnaire was designed to assess trauma-related attributional styles across four theoretically derived dimensions: locus of causality, controllability, stability, and globality. This study evaluates the psychometric properties of the instrument in both a non-clinical student sample and a clinical sample receiving inpatient or outpatient treatment for trauma-related disorders. Analyses will include internal consistency, factor structure, item performance, and construct validity through associations with PTSD symptoms and trauma-related cognitions.