Figure 3.

Structure and Predictors of Distinct Emergence Pathways

(A) The high-probability pathways from Figure 2, with states labeled according to the presence or absence of specific modes. Acquisition of wave-shake distinguishes pathways in different regions of the space (here left, where wave-shake is acquired late, and right, where it is acquired early). Pound, as a counterexample, does not separate regions of space to the same extent, being acquired at a similar stage in pathways in all regions. Block and pry also display different acquisition orders in different regions.

(B and C) Posterior orderings inferred using subsets of the data. Gray (top right) arcs give the posterior probabilities inferred from the full dataset (Figure 2); red and blue arcs give posteriors inferred using the two subsets. Some subsets have no observations of some modes: in these cases, the uniform prior is recovered, which is not plotted here. Specific modes, discussed in the text, displaying posterior differences between subsets are highlighted. (B) Aquatic and non-aquatic subsets; (C) primate and non-primate subsets.