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Rand et al. reply



replying to G. Tinghög et al. Nature498,

Tinghög et al.1 take issue with two of the ten experiments in our paper2 (studies 6 and 7). Here we reanalyse the data from these experiments as suggested by Tinghög et al.1, and demonstrate that our reported positive effect of time pressure on cooperation is not an artefact. Furthermore, an aggregate analysis based on fifteen studies and 6,910 decisions also replicates this effect3.

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  1. Tinghög, G. et al. Intuition and cooperation reconsidered. Nature 498, (2013)

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  2. Rand, D. G., Greene, J. D. & Nowak, M. A. Spontaneous giving and calculated greed. Nature 489, 427–430 (2012)

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  3. Rand, D. G. et al. Intuitive cooperation and the social heuristics hypothesis: evidence from 15 time constraint studies. Preprint at SSRN (2013)

  4. Piovesan, M. & Wengström, E. Fast or fair? A study of response times. Econ. Lett. 105, 193–196 (2009)

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  5. Rand, D. G. The promise of Mechanical Turk: how online labor markets can help theorists run behavioral experiments. J. Theor. Biol. 299, 172–179 (2012)

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D.G.R., J.D.G. and M.A.N. performed the analysis and wrote the paper.

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Correspondence to David G. Rand.

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Rand, D., Greene, J. & Nowak, M. Rand et al. reply. Nature 498, E2–E3 (2013).

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