“…The methodologies used to evaluate game-based intervention in the home energy space are diverse, with limited large-scale empirical data available; studies typically seek to provide design-level input through mixed-method or grounded theory approaches (Derek Foster, Lawson, Wardman, Blythe, & Linehan, 2012). Primary design-level evidence suggested by the literature base includes a likely limited impact of points, badges and leaderboards when introduced without an understanding of social context and how participants construct value around rewards (Wiersma, 1992); providing asynchronous feedback, avoiding 'push' notifications (Simon J., Jahn M., & Al-Akkad, 2012); and that challenge may be a stronger motivator than real or virtual incentives (Kalz, Börner, Ternier, & Specht, 2015). In an evaluation of a workplace game for energy consumption, implementing a leaderboard (Tolias E., Costanza E., Rogers A., Bedwell B., & N., 2015), users were observed to cheat, artificially altering their consumption data.…”