Fig. 9. Response probability and the movement direction of dummies. (A) Definition of the four track segments close to the burrow that were used in the analysis and the movement direction of the dummies in these segments. (B) The number of responses in each segment (histogram) and the probability of response per segment as fitted by the statistical model (dots joined by a solid line). Each segment has been divided into ten 2 cm-wide bins sorted according to their distance from the closest point (CP). The distances are sorted in the same way as a dummy would move through them during an experiment. The dummy-burrow distance is decreasing for segments 1 and 3 and increasing for segments 2 and 4. The response probability clearly differs between the four segments (GLMM; d.f.=3, Wald/d.f.=11.95, P<0.001).