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Fig. 2. Results of (A) learning tests and (B,C) Type 1 transfer tests. For each
group, the bars show the relative preferences for the four test stimuli when
the sample was a star-shaped flower, a circular flower, a plant stem or a
landscape, as shown underneath the abscissa. In each panel, N denotes
the number of bees that were tested in each experiment. Asterisks denote
statistically significant differences from the random choice level of 25%
(broken horizontal lines). ***P<0.001;
**P<0.01; *P<0.05. Black
asterisks refer to levels that are significantly greater than 25%, and red
asterisks to levels significantly lower than 25%. The circles denote no
significant difference from 25%. Values are means ±
S.E.M. of the data. In each case, the bees
are able to learn to choose the test stimulus that matches the sample.
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