Table 1.

Summary of different theoretical constructs and engagement strategies in SARA

SARA Engagement Strategies	Theoretical construct	Section
Points	Extrinsic motivation [2,15]/ Contingent reward [2]	2.2.1
Fish	Contingent reward [2] Fixed ratio reinforcement [3]	2.2.1
Fish trivia	Sensation seeking [18] Curiosity [27]	2.2.1
Badges	Contingent reward [2] Fixed ratio reinforcement [3] Differential reinforcement for high rate [3]	2.2.2
Monetary rewards	Contingent reward [2] Fixed ratio reinforcement [3] Differential reinforcement for high rate [3]	2.2.2
Inspirational memes/gifs	Autonomy/competency [29] Curiosity [27] Variable ratio of reinforcement [3] Contingent reward [2]	2.2.3
Funny memes/gifs	Variable ratio of reinforcement [3] Positive affect [28] Contingent reward [2]	2.2.3
Life-insight	Autonomy/competency [29] Curiosity [27] Sensation seeking [18] Contingent reward [2]	2.2.3
Reminder notification	Trigger [5] Effort/motivation [5]	2.2.4
Daily inspirational message	Reciprocity [4] Autonomy/competency [29] Curiosity [27]	2.2.4