Figure S2: Long and differential training to an equal-are pattern and similarity test (Experiment 1). from The role of colour patterns for the recognition of flowers by bees

To confirm that bees had learned well after ten trials, we trained control groups for a longer time, over 30 trials. (A) Bees were trained for ten or thirty trials in a Y-maze. Four groups of bees were trained to discriminate between two equal-area yellow-cyan patterns with the reversed colour arrangement, one of which was rewarded and the other not (differential conditioning), for either 10 or 30 trials. Two further groups were trained for 30 trials with only the rewarded training pattern. The yellow and cyan colours differed in chromatic contrast to the grey background (Table 1). * denote choice frequencies above chance with p<0.05. The results of the statistical tests are given in Table S1. (B) Bees were trained with an equal-area pattern and tested with two novel patterns, a ring pattern and a dot pattern that had the same colour configuration as the training pattern (yellow-centre N=6 bees, cyan centre N=7 bees). (C) Same test as (B) with blue-violet patterns that had the same chromatic contrast to the grey background. In a second test single colours were presented. The results of statistical tests are given in Table S1, S2.