Fig. 2.

Results of experimental series II. (a) Schematic illustration of apparatus used in the experiments of series II. IP1 denotes the position of the incorrect pattern when presented at a distance of 170 cm, and IP2 denotes the position of the incorrect pattern when presented at a distance 50 cm from the entrance to the decision chamber. (b) The results indicate that the trained bees always treat the sample at the training distance as the correct sample and the other sample as the incorrect one. Asterisks denote statistically significant differences from the random choice level of 50%. ***, P < 0.001; ○, no significant difference from 50%. Details are in the text.