Figure 3.

Bees' performances (A) in a unilateral differential conditioning procedure (A+B−/0 training); (B) in the test phase after 3 h retention. As before, honeybees transferred information about odor A to the opposite side. Responses to odor B were low on both sides. Comparing these results to those of Figure 2 (A+/0 training, see dotted line), responses to B appear to be inhibited on both sides, suggesting a transfer of inhibitory information between sides. Different letters indicate significantly different levels of responses (pairwise comparisons after Cochran's Q test).