Searching for a “super foot” with evolutionary-guided adaptive psychophysics

● we searched for a “super foot”, defined as one that carries salient directional information and a pronounced inversion effect What is the adequate local biological motion for the human visual system? ● For both Runs, error rates for the upright stimuli decreased, and the inversion effect increased across generations (Fig. 1). ● PCA applied to data of both Runs revealed that the first two pcs account for 93% of the variance. ● The Runs began at neighbouring points in space and evolved in the same general direction (Fig. 2). ● Loadings revealed that pc1 was largely contributed to by vertical amplitudes. Frequency was the main source of variation along pc2.