Data collection
Basic characteristics of the participants were collected using questionnaires to reveal potential confounders, for example: gender, age, and gaming experience. The primary outcomes were the experts’ score, the research team movement score and movement measured by an accelerometer. We hypothesized that more experienced sonographers make more goal-directed and efficient movements and that they would finish the exam faster. The research team counted the number of movements made. The experts scored predefined technical movements and mandatory visualizations for optimal IVC visualization (see appendix 