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Fig. 5. Bees trained in a two-step experiment failed to use a sequential priming
cue to switch their choice of colour. Top: in the first step of the
experiment, the two screens were placed in opposite corners of the arena with
their centres 210 cm apart, providing a different positional cue for each
screen. A group of four bees then learnt to approach the rewarded blue panel
in the left corner and the rewarded yellow panel in the right corner
significantly more often than the unrewarded panel. Bottom: the two screens
were moved close together with their centres 60 cm apart. One bee had ceased
foraging during the first stage of the experiment. The remaining three bees
failed to choose correctly and their performance did not recover over a
further 60 trials. They exhibited a slight preference for the blue panel,
whether the priming cue was blue or yellow.
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