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Fig. 5. Mean homing direction of repeatedly tested subjects in experiment I
(N=8). Each pair of large circles represents the arena in its
clockwise (left) or counterclockwise (right) rotated position, and the two
dashed lines inside are the two-leg outward journeys starting at the current
position of the nest. The dashed rectangle beneath each circle represents the
nest box in its standard 0° position, while the solid rectangle in the
upper part of the diagram represents the rotated nest. The dots along the
periphery of the arena circle indicate the mean orientation of each subject in
10–14 return trips, at the moment where the animal had reached the
peripheral annular zone of the arena. The (larger) open circles on the same
level represent the mean orientation of the whole experimental group. The
arrows that are centred on the point of departure of the return journey
represent the mean orientation of each subject at a distance of 35 cm from the
starting point of the return. The mean orientation of the whole experimental
group is represented by a large open arrow. For first order data, open symbols
represent non-significant results and full symbols represent significant
results (P<0.05 or 0.01; test of Rayleigh). All second order data
are significant at the 0.01 level (test of Moore).
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