Figure 5
From: Desert ants do not acquire and use a three-dimensional global vector
Experiment 2: Proportion of ascents and ascent distances after flat, ramp, and Λ training. (A) The criterion defining an ascent was for ants to walk more than 20 cm without turning around on one of the offered ramps. The frequencies of ants that decided to ascend differed between the three training paradigms (p < 0.001, χ2 homogeneity test). The pair-wise comparison was carried out with Fisher's exact test and a Bonferroni correction for multiple comparisons. (B) Frequency histograms of distances that ants walked on ascending ramps before turning around for the first time after flat training, ramp training, and Λ training. Ants that made a full ascent without ever turning around are plotted in the top bar. Ascent heights differed strongly between all three training paradigms (p < 0.001, Kruskal-Wallis H-test; Games-Howell post-hoc test for pair-wise comparisons).