Eight archetypes of gamification emerged from the analysis of health-related mobile apps: (1) competition and collaboration, (2) pursuing self-set goals without rewards, (3) episodical compliance tracking, (4) inherent gamification for external goals, (5) internal rewards for self-set goals, (6) continuous assistance through positive reinforcement, (7) positive and negative reinforcement without rewards, and (8) progressive gamification for health professionals. The results indicate a close relationship between the identified archetypes and the actual health behavior that is being targeted.

Amy Jo Kim interviews Casey Means, cofounder of Levels

They're everywhere. Nintendo's DS Lites are the favorite of everyone from kids to adults. With a wide range of games, an inviting interface and two screens for double the fun, Nintendo's portable gaming system is gaining fans worldwide. Just what makes a