Daniel J Lee, Michael L Crowe, Frank W Weathers, Michelle J Bovin, Stephanie Ellickson, Denise M Sloan, Paula Schnurr, Terence M Keane, Brian P Marx
We used item response theory (IRT) analysis to examine Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) item performance using data from three large samples of veterans (total N = 808) using both binary and ordinal rating methods. Relative to binary ratings, ordinal ratings provided good coverage from well below to well above average within each symptom cluster. However, coverage varied by cluster, and item difficulties were unevenly distributed within each cluster, with numerous instances of redundancy...
November 14, 2023: Assessment