Linking epistemic stance and problem-solving with self-confidence during play in a puzzle-based video game

• The multimodal methodology bridges talk, action, analytics, and eye gaze. • Problem solving actions are outwardly laminated with players' (un)certainty. • Being stuck and not knowing what to do relates to low self-confidence in a video game. • Experiencing high self-confidence is more related to certain problem-solving actions. • Self-confidence emerges as a dynamic interaction between the player and the game.