Fig. 6.

Number of individual choices to left and right sides in the test trials. The y axis represents individual subjects; D dog, P pig. Negative values on the x axis show choices to the left, while positive values show choices to the right side (from the subject’s point of view, see also Fig. 4). ‘Fail’ stands for incorrect and ‘Success’ stands for correct choices. Significance codes (for side bias, Binomial tests): '***' < 0.001; '**' < 0.01; '*' < 0.05