Do Capuchin Monkeys (Cebus apella) Diagnose Causal Relations in the Absence of a Direct Reward? Edwards, Brian J. ; Rottman, Benjamin M. ; Shankar, Maya ; Betzler, Riana ; Chituc, Vladimir ; Rodriguez, Ricardo ; Silva, Liara ; Wibecan, Leah ; Widness, Jane ; Santos, Laurie R. Abstract Publication: PLoS ONE Pub Date: February 2014 DOI: 10.1371/journal.pone.0088595 Bibcode: 2014PLoSO...988595E