Fig. 3

The results of experiments three and four, showing the proportion of choices (mean ± 95% C.I., n = 80 per visual angle category) by D. hydei (dark points and line) and M. domestica (light points and line) for yellow-versus-white spider models presented against (a) “average” backgrounds and (b) “augmented” backgrounds. Dashed lines in indicate mean choice frequencies within homogenous sets, as determined by a-posteriori simultaneous G-tests (Table 3)