Relative role of visual and non-visual cues in determining the direction of "up": experiments in the York tilted room facility. Export

@article{citeulike:4798775, abstract = {Perceiving a direction as "up" is fundamental to human performance and perception. Astronauts in microgravity frequently experience reorientation illusions in which they, or their world, appear to flip and 'up' becomes arbitrarily redefined. This paper assesses the relative importance of visual cues in determining the perceived up direction. In the absence of information about the origin of illumination, people interpret surface structure by assuming that the direction of illumination is from above. Here we exploit this phenomenon to measure the influence of head and body orientation, gravity and visual cues on the perceived up direction. Fifteen subjects judged the shape of shaded circles presented in various orientations. The circles were shaded in such a way that when the shading was compatible with light coming from above, the circle appeared as a convex hemisphere. Therefore, by finding which shaded circle appeared most convex, we can deduce the direction regarded as "up". The different cues contributing to this percept were separated by varying both the orientation of the subject and the surrounding room relative to gravity. The relative significance of each cue may be of use in spacecraft interior design to help reduce the incidence of visual reorientation illusions.}, author = {Jenkin, H. L. and Dyde, R. T. and Jenkin, M. R. and Howard, I. P. and Harris, L. R.}, citeulike-article-id = {4798775}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/15096672}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=15096672}, issn = {0957-4271}, journal = {Journal of vestibular research : equilibrium \& orientation}, keywords = {cue, direction, role, visual}, number = {4-6}, pages = {287--293}, posted-at = {2009-06-10 16:21:38}, priority = {2}, title = {Relative role of visual and non-visual cues in determining the direction of "up": experiments in the York tilted room facility.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/15096672}, volume = {13}, year = {2003} }

TY - JOUR ID - citeulike:4798775 L3 - citeulike-article-id:4798775 N2 - Perceiving a direction as "up" is fundamental to human performance and perception. Astronauts in microgravity frequently experience reorientation illusions in which they, or their world, appear to flip and 'up' becomes arbitrarily redefined. This paper assesses the relative importance of visual cues in determining the perceived up direction. In the absence of information about the origin of illumination, people interpret surface structure by assuming that the direction of illumination is from above. Here we exploit this phenomenon to measure the influence of head and body orientation, gravity and visual cues on the perceived up direction. Fifteen subjects judged the shape of shaded circles presented in various orientations. The circles were shaded in such a way that when the shading was compatible with light coming from above, the circle appeared as a convex hemisphere. Therefore, by finding which shaded circle appeared most convex, we can deduce the direction regarded as "up". The different cues contributing to this percept were separated by varying both the orientation of the subject and the surrounding room relative to gravity. The relative significance of each cue may be of use in spacecraft interior design to help reduce the incidence of visual reorientation illusions. IS - 4-6 JF - Journal of vestibular research : equilibrium & orientation SN - 0957-4271 EP - 293 TI - Relative role of visual and non-visual cues in determining the direction of "up": experiments in the York tilted room facility. VL - 13 SP - 287 KW - cue KW - direction KW - role KW - visual AU - Jenkin, HL AU - Dyde, RT AU - Jenkin, MR AU - Howard, IP AU - Harris, LR PY - 2003/// UR - http://view.ncbi.nlm.nih.gov/pubmed/15096672 ER -