Figure 3

Mate-copying indexes with live or photo demonstrations. Number inside bars: number of trials. Statistics: above bars, P values of the binomial tests of departure from random choice (represented by the dashed line); the P value above the horizontal bar is that of the comparison between live and picture demonstrations (GLMM). Error bars represent Agresti-Coull 95% confidence intervals. For an example of the photos used see Fig. 2a.