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Fig. 5. Results of Expt 2, shape discrimination based on motion contrast, and
generalization from motion contrast to luminance contrast and colour contrast.
Bees were trained with a patterned disc (positive) versus a patterned
triangle (negative) placed against a similarly patterned background. (A) Inset
shows the choice frequency (CF) obtained during the training and the number of
choices(N) on which it is based. The trained bees were then offered a
choice between the trained patterned disk and four different novel patterned
shapes, all placed on the patterned background. (B) The trained bees were
given 12 different transfer tests, presenting black or coloured shapes either
on a white background or on a patterned background. The bars denoting the CFs
obtained in each test are coloured or patterned accordingly to the colour or
pattern of the shapes used in the test, and the type of background is shown in
the margins of each bar. In these tests, the disk was tested either
versus a triangle, which was the negative training shape, or
versus a square, which was novel to the bees (abscissa). The number
above each bar denotes the total number of choices recorded in the test.
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