Ho, Maloney, & Landy (2006)
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چکیده
We ran a control experiment in this study with the same experimental design as Ho, Landy, & Maloney (2006): we varied the angle between the punctate light source and the surface, but the viewer’s viewpoint was always fronto-parallel. The results shown in the following tables and figure demonstrate that observers in this study exhibited the same roughness judgment biases as observers in our previous study when only illuminant position was varied. The effect of varying illuminant position on perceived roughness is strong; furthermore, any effect found in our current study is most likely not unique to our sample of observers.
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The Expected Utility of Movement
Acknowledgments: We thank Paul Glimcher for his comments on an earlier draft of this manuscript.
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Julia Trommershäuser, Department of Psychology, Giessen University, Otto-Behaghel-Str. 10F, D-35394 Giessen, Germany; ph: 01149-641-26118; fax: 01149-641-26119; email: [email protected] Acknowledgement: We thank Paulina Trzcinka, Diana Pittig, and Florian Bayer for help with data collection. DECISION MAKING AND MOVEMENT PLANNING UNDER RISK Julia Trommershäuser, Lauren...
متن کاملHow direction of illumination affects visually perceived surface roughness.
We examined visual estimation of surface roughness using random, computer-generated, three-dimensional (3D) surfaces rendered under a mixture of diffuse lighting and a punctate source. The angle between the tangent to the plane containing the surface texture and the direction to the punctate source was varied from 50 to 70 deg across lighting conditions. Observers were presented with pairs of s...
متن کاملDecision Making and Movement Planning
number of words):141 (max. 150) Total number of words (text): 3447 Number of words (boxes): 1415 Number of Figures: 5 Number of Boxes: 2 Number of References: 72 Number of Pages: 28
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