Fig. 4. Normalized histograms of head orientations (deg.) used by subjects when listening to stimuli presented in our auditory two-alternative forced-choice (2AFC) task (Fig. 1B; 3° histogram bins). Frequency of occurrence is represented by the radial axis and samples sizes for each subject are listed below the graph. Distributions are calculated for auditory stimuli presented from speaker separation angles <15° (<30° for subject 404).