Figure 1. Standardised cell residuals (SCRs) to demonstrate the primary results in the Log linear model of Thorpe et al. 2007a. The left-hand diagram shows the relationship between locomotion and the number of supports used and the right shows the relationship between locomotion and the diameters of the supports used. SCRs indicate by their sign whether an interaction is more (positive values) or less (negative values) common than predicted by the model and, by their size, to what degree. SCRs greater than +−2.0 indicate a lack of fit. The graphs show that quadrupedalism is strongly associated with locomotion on single, large, stable supports >200mm in diameter; orthograde suspension is mostly associated with locomotion on supports between 40–100mm in diameter. In contrast bipedalism is strongly associated with locomotion on multiple supports and those that are <40mm in diameter.
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