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Fig. 3. Bees used a sequential priming cue to choose a rewarded stimulus that they
approached after a short delay. Top shows the arrangement of training and test
stimuli. Bees entered the priming set up at the arrow at the bottom of the
diagram. A yellow priming stimulus in a tunnel predicted that bees should
approach a rewarded (+) blue-black checkerboard rather than a non-rewarded (-)
yellow-black checkerboard, and a blue priming stimulus in the same tunnel
predicted that a uniform yellow panel was rewarded and that a uniform blue
panel was unrewarded. The diagram shows baffles in front of the tunnel. Bottom
shows the results of the tests. When bees were trained with a priming tunnel
without baffles in front, their performance showed no influence of the priming
cues. Six bees trained with no baffles showed no preference for the blue-black
checkerboard, when the tunnel was yellow, or for the uniform yellow panel,
when the tunnel was blue. Seven bees trained with frontal baffles added to the
tunnel were influenced by the priming cues. They preferred the blue-black
checkerboard when the priming cue was yellow and the uniform yellow panel when
the priming cue was blue.
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