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. 2015 Aug 12;10(8):e0135539. doi: 10.1371/journal.pone.0135539

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© 2015 Benjamin Thomas Crane

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 2 — The abscissa represents the stimulus heading. The ordinate represents the response error (perceived minus stimulus heading). Curves represent the best fit of the PVD model. Top row (A&B): The head centered gaze centered (HCGC) condition. Second row (panels C-E): The head centered gaze varied (HCGV) condition with gaze varied by ±28°. The gaze direction strongly influenced visual heading perception as indicated by the PVD model phase/offset parameter (φ). Third row (F-H): Head position varied over ±28° with gaze centered (HVGC). Inertial headings were independent of head position. Bottom row (I-K): Varying gaze and head yielded results similar to varying gaze alone (C-E).