The immersive Debriefing : Comparative evaluation of Full and Segmented Redo methods in Virtual Reality

This study investigates the impact of two immersive debriefing strategies on learning outcomes in a virtual reality (VR) simulation focused on mobile cybersecurity. The simulation highlights everyday mistakes to raise awareness of risky behaviors in public settings. We developed and evaluated an immersive debriefing system that enables participants to review their performance and re-engage with the scenario through a redo phase. This redo was implemented in two formats: a full scenario redo (F-REDO) and a segmented redo targeting specific moments (S-REDO). We found that both redo formats were equally effective in learning outcomes and user satisfaction, using a mixed-methods approach combining standardized questionnaires (motivation, cognitive load, usability, knowledge retention) and qualitative trainer feedback. However, S-REDO demonstrated greater time efficiency without increasing cognitive load and was perceived by the trainer as more engaging and pedagogically relevant. These results support the integration of personalized, interactive debriefing tools in VR learning environments, particularly in domains requiring targeted remediation and critical decision-making. Abstract Abstract