Fig. 11: Box-and-whisker plots illustrating the statistical comparison of slip distances among five foot features—including three hoof-inspired designs and two control feet (Cube and Ball)—under six experimental conditions.

The Kruskal–Wallis test was used to assess significant differences in slip behaviour between groups. Each sub-plot represents a specific combination of slope angle and impact force level. Median slip distances are annotated beside each box to aid visual interpretation.