Abstract
In order to distinguish between visual and force-oriented reference frames, head tilt of driver and passengers was measured as they went around a number of carefully chosen corners at different speeds. Two mutually-exclusive hypotheses were tested. Our first hypothesis was that head tilt would be correlated with lateral force indicating a gravito-interial reference frame. Our second hypothesis was that head tilt would be correlated with a visually-available estimate of the curvature of the road indicating a visual reference frame. Although measurements have been made of steering accuracy and eye movement strategies whilst cornering, head tilt has not previously been measured. (A)