@inproceedings{424574214a2b43c3a22f0e8eb18d9635,
title = "Goalkeeper: A Zero-Sum Exergame for Motivating Physical Activity",
abstract = "Incentives and peer competition have so far been employed independently for increasing physical activity. In this paper, we introduce Goalkeeper, a mobile application that utilizes deposit contracts for motivating physical activity in group settings. Goalkeeper enables one to set up a physical exercise challenge with a group of peers that deposit a fixed amount of money for participating. If a peer fails to complete the challenge, Goalkeeper redistributes their deposit to those who managed to complete it (i.e., zero-sum game). We evaluated the potential of Goalkeeper in increasing physical activity with a total of 50 participants over the course of 2 months. Our findings suggest that deposit contracts induce a loss-aversion bias, that in combination with peer competition, is effective in increasing exercise motivation. Ultimately, we generate a set of design principles for exergames that utilize deposit contracts for increasing physical activity in group settings.",
keywords = "Exercise contracts, Motivation, Peer competition, Physical activity, Zero-sum game",
author = "Evangelos Niforatos and Camilla Tran and Ilias Pappas and Michail Giannakos",
year = "2021",
doi = "10.1007/978-3-030-85613-7_5",
language = "English",
isbn = "9783030856120",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer",
pages = "65--86",
editor = "Carmelo Ardito and Rosa Lanzilotti and Alessio Malizia and Alessio Malizia and Helen Petrie and Antonio Piccinno and Giuseppe Desolda and Kori Inkpen",
booktitle = "Human-Computer Interaction – INTERACT 2021 - 18th IFIP TC 13 International Conference, Proceedings",
note = "18th IFIP TC 13 International Conference on Human-Computer Interaction, INTERACT 2021 ; Conference date: 30-08-2021 Through 03-09-2021",
}