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Fig. 6. Green color discrimination. Percent choices of P. icarus for the
rewarded four training colors, in relation to the ratio between the
intensities of the rewarded (+) color and unrewarded color. Each symbol
represents one individual animal's performance and the line, the average. (A)
Six P. icarus trained to 590 nm as the rewarded color and 450 nm as
the unrewarded color. All choices differ significantly from chance
(P<0.05). (B) Five of the same individuals as in A trained to 590
nm as the rewarded color and 570 nm as the unrewarded color. Only choices at
intensity ratio of 10 differ significantly from chance (P<0.05)
and not the choices at intensity ratios of 0.1 and 1 (P>0.05). (C)
Three of the same individuals as in A trained to 590 nm as the rewarded (+)
color and 560 nm as the unrewarded color. Correct choices were made more than
75% of the time at intensity ratio of 0.1 and the choices of individuals 2 and
4 differ significantly from chance at intensity ratios of 1 and 10
(P<0.05). (D) Eight new individuals trained at 560 nm as the
rewarded color and 590 nm as the unrewarded color. All choices made by every
single individual differ significantly from chance (P<0.05).
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