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Learning curves for (a) UV, (b) blue and (c) green polarized light. (a) The UV-trained bees exhibited learning performance after the fifth conditioning trial. The asterisk indicates the point when the effect of conditioning was found by the change point analysis. (b,c) The blue- and green-trained bees did not learn CS+ throughout the trials. 1–15, number of each conditioning trial; T, test trial. Black circles, CS+; white circles, CS−.
