Figure 4.

Bees' performances (A) in a bilateral differential conditioning procedure (A+/B− training). In this case, conditioning performances were significantly higher on the left than on the right side, so acquisition curves are shown for each side (broken lines); (B) in the test phase after 3 h retention. As before, honeybees transfer information about odor A to the opposite side. Responses to odor B are on both sides lower than in Figure 2 (A+/0 training, see dotted line) although bees responded more on Side 1 (A+ side) than on Side 2 (B− side). Different letters indicate significantly different levels of responses (pairwise comparisons after Cochran's Q test).