Fig. 2

Change in knowledge score via 48-item multiple choice exam (A-C) and self-confidence via 16-item 5-point Likert scale (D-F). A A paired samples t-test (n = 51) revealed significantly improved scores after course completion. B There were no significant differences in score change among medical physicists (red), radiation oncologists (blue), and radiation therapists (green). C Multivariable linear regression did not identify synchronous attendance as a predictor of score improvement (r^2 = 0.10, F statistic = 2.75, degrees of freedom = 50, p-value = 0.07), although a positive linear trend was observed. D Paired sample t-tests (n = 88) demonstrated significantly improved self-confidence levels across all four domains after course completion (n = 88). E There were no significant differences in overall self-confidence change among medical physicists (red), radiation oncologists (blue), and radiation therapists (green). F Spline regression demonstrated a significant impact of synchronous attendance on change in self-confidence for “high attendance” (defined as attending ≥18 live sessions) participants (r2 = 0.16, F statistic = 6.30, degrees of freedom 36, p-value = 0.02)