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Haptic space processing – allocentric and egocentric reference frames

By A.M.L. Kappers


In this paper a haptic matching task is used to\ud analyze haptic spatial processing. In various conditions,\ud blindfolded participants were asked to make a test bar parallel\ud to a reference bar. This always resulted in large but\ud systematic deviations. It will be shown that the results can\ud be described with a model in which an egocentric reference\ud frame biases the participants’ settings: What a participant\ud haptically perceives as parallel is a weighted average\ud of parallel in allocentric space and parallel in egocentric\ud space. The basis of the egocentric reference frame is uncertain.\ud There is strong evidence that at least a hand-centred\ud reference frame is involved, but possibly a body-centred\ud reference frame also plays a role

Topics: Natuur- en Sterrenkunde
Year: 2007
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