Illustration of the eye–head lawful relationship for gaze shifts for R2G movements (A–C), G2Y movements (D–F), and Y2Y movements (G–I). The horizontal components of eye amplitude (A, D, G), head contribution (B, E, F) and total head amplitude (C, F, I) are plotted as a function of horizontal gaze amplitude for the different classes of gaze shifts. The colored symbols in these plots mark the initial eye position in head (IEPh), as shown by the spectrum in (J). The data presented here and in subsequent figures were pooled across 2 days sessions to obtain a definitive comparison of gaze shifts produced in the dissociation and standard tasks.