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. Author manuscript; available in PMC: 2016 Jan 31.
Published in final edited form as: Trends Cogn Sci. 2014 Dec 11;19(2):65–72. doi: 10.1016/j.tics.2014.11.007
9 studies compete or cooperate; contrast human >computer
2 studies play with another human, but no computer contrast
3 studies only low-level control conditions
3 studies no contrast, only model-based fMRI