From: Efficiencies for parts and wholes in biological-motion perception Journal of Vision. 2017;17(12):21. doi:10.1167/17.12.21 Figure Legend: Overlap in orientation of the trajectories created by hands and feet and in left- and right-facing stimuli across rotation conditions. Each plot shows two histograms: left-facing stimuli (solid gray) and right-facing stimuli (black outline). Each histogram depicts the number of frames in which connecting the two points (either hands or feet) creates a particular angle relative to horizontal, as represented by θ in Figure 5. The isolated-hands stimuli show progressively more overlap from no rotation to bidirectional rotation to unidirectional rotation, whereas the feet show the most overlap in the bidirectional-rotation condition and the least in the unidirectional-rotation condition. Additionally, all the frames with an orientation of 0° (horizontal) are overlapping, each stimulus set having the same number of frames that satisfy this criterion in its right- as in its left-facing version. The spike at zero and the gaps immediately adjacent are due to the limited resolution of the frames: One pixel of vertical displacement at 20 pixels of horizontal displacement corresponds to an angle of 1.24°. Each bin is 1° wide. Date of download: 1/2/2018 The Association for Research in Vision and Ophthalmology Copyright © 2018. All rights reserved.