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Results of (a) experiment 1 and (b) experiment 2, showing the mean choice probabilities, and standard errors of the means (in parentheses) for each exit tunnel in tests 1, 2 and 3, evaluated as described in §2. The stripes denote the direction of polarization of the illumination in each tunnel. In each panel, the correct exit tunnel (the tunnel presenting the same illumination as in the entrance tunnel) is shown in green.
