• image
  • For example, a case where you want to promote fitness
    • Reward for exercise” is the pattern on the left (market-type incentive for individuals)
    • Social Network Incentive: “Encourage others to exercise and reward those who do” is a social network incentive.
  • experiment
    • market-based incentive
      • Reward the individual for increased physical activity
    • Social Network Incentives
      • Assign 2 “buddies” to each person x
      • x’s buddy receives cash for each increase in x’s momentum
    • result
      • Social network incentives were four times more effective than market-based incentives for individuals
      • Four times the amount of behavior change per dollar.

from 5edf435aaff09e0000cf92f5 p.87

  • Aharony, N., Pan, W., Ip, C., Khayal, I. and Pentland, A., 2011. Social fMRI: Investigating and shaping social mechanisms in the real world. Pervasive and Mobile Computing, 7(6), pp.643-659.
  • Adjodah, D.D., 2013. Understanding social influence using network analysis and machine learning (Doctoral dissertation, Massachusetts Institute of Technology).
  • Friends and Family Study
    • FunFit
    • Part of a study conducted by the MIT Media Lab in 2010
    • GPS, accelerometers, and Facebook feeds were collected from 130 subjects for over a year.
      • During two months of that period, there was an intervention on physical activity
  • Measuring the amount of motion with an accelerometer see Adjodah 2.3 Measuring behavior change
  • Cost per unit of momentum improvement / Average improvement rate
    • control When paying compensation to individuals $83 / 3.2
    • If checked by peer-see buddy $39.5 / 5.5
    • Peer-reward If rewarded for a buddy $12 / 10.4
  • Peer-see is a condition that rewards the individual as well as control, and also allows two buddies to see the amount of exercise.
  • consideration
    • Buddies become a team with the common goal of “increasing x momentum”.
    • Engagement (collaborative behavior) on how to increase x momentum is encouraged.
  • Momentum was maintained after incentives were removed.
  • Coefficient of determination of correlation between behavior change and number of calls is 0.8, 0.9 for all communication channels
    • In other words, rewarding buddies promotes communication.

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