“…Categorization that uses approximate descriptions (e.g., poor, satisfactory, and very good) can be meticulously modeled-as shown in mathematical approaches to medical diagnosis (e.g., Klir & Yuan, 1995;Innocent, John & Garibaldi, 2004) and medical expert systems (Adlassnig, 1986;Phuong, 1995)-using fuzzy logic. We thereby follow others, though using a differing approach, in choosing fuzzy logic to address the weaknesses of the traditional approach to inter-rater reliability (e.g., Ciavolino, Salvatore, & Calgagnì, 2013) and issues in personnel assessment (e.g., Capaldo & Zollo, 2001). We exemplify the approach with a case from our research in which pilots give their reasons for assessing the performances of peers videotaped in flight simulator scenarios, using as our example those parts of the assessment sessions that focused on situational awareness.…”