Not Very Effective: Validity Issues of the Effectance in Games Scale. - Nick Ballou; Heiko Breitsohl; Dominic Kao; Kathrin Gerling; Sebastian Deterding (CHI PLAY, 2021)

How does Juicy Game Feedback Motivate? Testing Curiosity, Competence, and Effectance. - Dominic Kao; Nick Ballou; Kathrin Gerling; Heiko Breitsohl; Sebastian Deterding (CHI, 2024)