Linear Vection

John Rieser and Doug Morse are conducting a series of experiments on the perception and psychophysics of linear vection. To experience linear vection is to perceive oneself as translating through some space due to visual input alone when in fact one is not moving.

Linear vection is of theoretical interest because what gives rise to it and how it is perceptually organized is not well understood (especially when compared to circular vection). In addition, it is often the case that the illusion of self-translation within immersive virtual reality environments is not very compelling. For example, people often do not believe that they are truly moving, or if they do believe that they are truly moving, they often have difficulty in keeping up with where they are in space. As such, a better understanding of linear vection also has the potential practical benefit of leading to better ways of creating immersive virtual reality environments.

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