Deliberation erodes cooperative behavior–even towards competitive out-groups, even when using a control condition, and even when eliminating selection bias
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Everett, J.A.C., Ingbretsen, Z., Cushman, F., & Cikara, M. (2017). Deliberation erodes cooperative behavior–even towards competitive out-groups, even when using a control condition, and even when eliminating selection bias. Journal of Experimental Social Psychology 73, 76-81. DOI:10.1016/j.jesp.2017.06.014