Vision

The perceptual upright (PU)-- the orientation in which an object is most easily and naturally recognized-- is determined by a combination of the orientation of the body, the visual background, and gravity. Dyde, Jenkin & Harris (2006) proposed a vector sum model to explain differences in PU with changes in body orientation from upright to right side down. Does this model generalize to intermediate body tilts? Bo dy V ec to r