Fig. 3
From: Self-control has a social role in primates, but not in other mammals or birds
Performance on two cognitive tasks for different taxonomic groups for the two tasks in the MacLean et al. sample. (a) Mean (± 2se) percentage success on the A-not-B inhibition task. The dashed horizontal line denotes the chance response rate at 33% (for a task in which the animal chooses between three locations); the solid horizontal line indicates a chance response rate of 50% (assuming the animal only chooses between the two external cups and ignores the central cup). (b) Mean (± 2 se) percentage success on the cylinder task. The dashed horizontal line denotes the chance response rate at 50% (for a task in which the animal chooses between one of two locations). Number of species sampled for each taxon on the two tasks: birds (11,7 respectively), rodents (4,2), carnivores (3,2), elephant (1,1), prosimians (7,8), anthropoid primates (25,12). Data from58.
