The entrance of the maze led to a decision chamber, where the honeybee could choose between the two arms of the maze.
During the training proper, baffles behind the entrances of the two choice chambers (See Fig. 1) completely prevented the bees from viewing the feeder in the reward chamber from the decision chamber.
Moreover, during the occasions when more than one bee did enter the decision chamber, the experimenter would open the lid of the chamber, and let the excess bees out of the maze.
The back walls of the maze (20×20 cm) were placed at a distance of 15 cm from the decision chamber and were covered by a white reflecting UV background on which color targets were presented.
Instead, the bees performed well only when at least one of the patterns in the decision chamber contained a number on which they had been previously trained (i.e., two or three).
The bee had to then fly through a 1-meter long tunnel and then into a decision chamber, where it was presented with two choice patterns, only one of which was identical to the sample.
They therefore subtended a visual angle of 26° to the centre of the decision chamber and were thus large enough to recruit the chromatic pathways of the honeybee's visual system [53].
Endorsement decisions, chamber officials said, are based on candidates' votes on a series of business-related bills, and through consultations with the chamber's regional directors, state affiliates and members.
The decision means Chambers is now eligible for selection into Team GB's track and field squad, and Millar for the cycling road race team.
