ABsite Exam Demonstrates Strong Reliability and Unidimensionality

The internal structure study of the American Board of Surgery In-Training Examination (ABSITE) revealed strong reliability (Cronbach’s alpha >0.9) along with suitable item difficulty (0.66) and item discrimination index (>0.2). Analyzing data from 55,986 unique test results between 2018 and 2023, the findings suggest that ABSITE is a unidimensional tool, which makes it appropriate for formative assessments in surgical education. Future research should explore the constructs measured by the exam.