Research Topics
| J F NormanSummaryAffiliation: Western Kentucky University Country: USA Publications
| Collaborators
|
Detail Information
Publications
Aging and the perception of 3-D shape from dynamic patterns of binocular disparityJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101, USA
Percept Psychophys 68:94-101. 2006..quot; The process of aging does affect stereopsis, but the effects are quantitative rather than qualitative...- Aging and the visual, haptic, and cross-modal perception of natural object shapeJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green 42101 1030, USA
Perception 35:1383-95. 2006..Overall, the results of the experiments reveal that older observers can effectively perceive 3-D shape from both vision and haptics... 
Aging and the haptic perception of 3D surface shapeJ Farley Norman
Department of Psychology and Center for the Study of Lifespan Development, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Atten Percept Psychophys 73:908-18. 2011..The results of the current study demonstrate that while older adults do possess reductions in tactile sensitivity and acuity, they nevertheless can effectively perceive 3D surface shape from haptic exploration...- Solid shape discrimination from vision and haptics: natural objects (Capsicum annuum) and Gibson's "feelies"J Farley Norman
Department of Psychology, Western Kentucky University, 1906 College Heights Blvd 21030, Bowling Green, KY 42101 1030, USA
Exp Brain Res 222:321-32. 2012..g., participants able to actively manipulate objects and see them from a variety of perspectives), we found no significant difference between visual and haptic solid shape discrimination... - Aging and the discrimination of 3-D shape from motion and binocular disparityJ Farley Norman
Department of Psychology and Center for the Study of Lifespan Development, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Atten Percept Psychophys 74:1512-21. 2012.... 
The perception of 3-D shape from shadows cast onto curved surfacesJ Farley Norman
Department of Psychology, 1906 College Heights Blvd 21030, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Acta Psychol (Amst) 131:1-11. 2009..The variations in curvature which occur in different directions on saddle-shaped background surfaces cause shadow distortions that lead to difficulties in object recognition and discrimination...- Aging preserves the ability to perceive 3D object shape from static but not deforming boundary contoursJ Farley Norman
Department of Psychology and Center for the Study of Lifespan Development, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Acta Psychol (Amst) 129:198-207. 2008..e., moving) silhouettes. The reduced ability of older observers to perceive 3D shape from motion is probably due to a low-level deterioration in the ability to detect and discriminate motion itself... - Learning to perceive differences in solid shape through vision and touchJ Farley Norman
Department of Psychology, 1906 College Heights Blvd 21030, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Perception 37:185-96. 2008..In general, the results indicate that effective cross-modal shape comparisons can be made between the modalities of vision and active touch, but that complete information transfer does not occur... - Aging and the depth of binocular rivalry suppressionJ Farley Norman
Department of Psychology, Western Kentucky University, 1906 College Heights Boulevard 21030, Bowling Green, KY 42101, USA
Psychol Aging 22:625-31. 2007..This increased suppression that accompanies aging can be explained by a reduction in the inhibition produced by the binocular matching circuitry of S. R. Lehky and R. Blake's (1991) model... - The visual discrimination of bendingJ Farley Norman
Department of Psychology, 1906 College Heights Blvd, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Perception 36:980-9. 2007..This similarity suggests that relatively straightforward information about the elasticity of simple bending objects is available in projected retinal images... - Aging and the perception of local surface orientation from optical patterns of shading and specular highlightsJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, Kentucky 42101 1030, USA
Percept Psychophys 69:23-31. 2007..Significant, but modest, effects of age were found in Experiment 1, but not in Experiment 2. The ability to perceive local surface orientation appears to be relatively well preserved with increasing age, at least through the age of 80... - The perception of distances and spatial relationships in natural outdoor environmentsJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101 3576, USA
Perception 34:1315-24. 2005..Considered as a whole, the results indicate that there is no single relationship between physical and perceived space that is consistent with observers' judgments of distances in ordinary outdoor contexts... - The role of explicit and implicit standards in visual speed discriminationJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Perception 37:889-901. 2008..The formation of an implicit standard in the method of single stimuli allows human observers to make judgments of speed that are as precise as those obtained when explicit standards are available... - Stereopsis and agingJ Farley Norman
Department of Psychology, 1906 College Heights Boulevard 21030, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Vision Res 48:2456-65. 2008..The results also showed, however, that age-related differences in stereopsis do exist, and they become most noticeable when the older stereoscopic system is challenged by multiple simultaneous factors... - Visual memories for perceived length are well preserved in older adultsJ Farley Norman
Department of Psychology and Center for the Study of Lifespan Development, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Vision Res 51:2057-62. 2011..Both age groups performed similarly in all conditions. The results demonstrate that older observers retain the ability to create, remember, and utilize effective implicit standards from a series of visual stimuli... - Blindness enhances tactile acuity and haptic 3-D shape discriminationJ Farley Norman
Department of Psychology, Western Kentucky University, 1906 College Heights Blvd 21030, Bowling Green, KY 42101 1030, USA
Atten Percept Psychophys 73:2323-31. 2011..The results of the present study demonstrate that blindness does lead to an enhancement of tactile abilities, but they also suggest that early visual experience may play a role in facilitating haptic 3-D shape discrimination... - Effective 3-D shape discrimination survives retinal blurJ Farley Norman
Department of Psychology, Western Kentucky University, 1906 College Heights Blvd 21030, Bowling Green, KY 42101 1030, USA
Atten Percept Psychophys 72:1569-75. 2010..Our results indicate that accurate global shape discrimination survives a considerable amount of retinal blur... - Aging and the discrimination of object weightJ Farley Norman
Department of Psychology, 1906 College Heights Blvd 21030, Western Kentucky University, Bowling Green, Kentucky 42101 1030, USA
Perception 38:1347-54. 2009..4% and 6.6% of the standard for the older and younger observers, respectively. The current findings of an age-related deterioration in the ability to discriminate lifted weight extend and disambiguate the results of earlier research... - Modulatory effects of binocular disparity and aging upon the perception of speedJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101 1030, United States
Vision Res 50:65-71. 2010..These age-related changes in the perception of speed are broadly consistent with the results of recent neurophysiological investigations that find age-related changes in the functionality of cortical area MT... - Stereoscopic shape discrimination is well preserved across changes in object sizeJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101 1030, United States
Acta Psychol (Amst) 131:129-35. 2009..It appears that human observers can recognize the three-dimensional shape of objects in a manner that is relatively independent of size... - Aging and the perception of slant from optical texture, motion parallax, and binocular disparityJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, Kentucky 42101, USA
Atten Percept Psychophys 71:116-30. 2009.... - Visual discrimination of local surface structure: slant, tilt, and curvednessJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101 1030, USA
Vision Res 46:1057-69. 2006..Performance was much worse, however, for judgments of curvedness, and these judgments were significantly impaired when there were simultaneous variations in the shape index parameter of curvature... - Aging and the perception of depth and 3-D shape from motion parallaxJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101, USA
Psychol Aging 19:506-14. 2004..In contrast, no age effect was obtained in Experiment 2. Older observers can effectively perceive variations in depth from patterns of motion parallax, but their ability to discriminate 3-D shape is significantly compromised... - Stereoscopic discrimination of interval and ordinal depth relations on smooth surfaces and in empty spaceJ F Norman
Department of Psychology, Western Kentucky University, Bowling Green 42101, USA
Perception 27:257-72. 1998..This effect was most pronounced when there was a continuous surface in between the points, suggesting that accurate knowledge of the three-dimensional structure of surfaces is primarily limited to relatively small local neighborhoods... - The perception and recognition of natural object shape from deforming and static shadowsJ F Norman
Department of Psychology, Western Kentucky University, Bowling Green 42101, USA
Perception 29:135-48. 2000..These results support the idea that there are invariant features of shadow boundaries that permit the recognition of shape (cf Koenderink, 1984 Perception 13 321-330)... - The perception of length on curved and flat surfacesJ F Norman
Department of Psychology, Western Kentucky University, Bowling Green 42101, USA
Percept Psychophys 62:1133-45. 2000..These results demonstrate that the perception of length on surfaces is highly dependent on the particular context in which the length occurs... - The effects of age upon the perception of depth and 3-D shape from differential motion and binocular disparityJ F Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101, USA
Perception 29:1335-59. 2000..The results demonstrate that older adults can extract depth and shape from optical patterns containing only differential motion or binocular disparity, but these abilities are often manifested at reduced levels of performance... - The perception and discrimination of local 3-D surface structure from deforming and disparate boundary contoursJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, Kentucky 42101, USA
Percept Psychophys 64:1145-59. 2002.... - Aging and the perception of speedJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101 3576, USA
Perception 32:85-96. 2003.... - The visual and haptic perception of natural object shapeJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, Kentucky 42101, USA
Percept Psychophys 66:342-51. 2004..Taken together, the results suggest that vision and touch have functionally overlapping, but not necessarily equivalent, representations of 3-D shape... - Aging and the perception of biological motionJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, KY 42101, USA
Psychol Aging 19:219-25. 2004..Unlike their performance on other 2- or 3-dimensional motion tasks, older observers' ability to perceive biological motion is relatively well preserved... - The visual perception of length along intrinsically curved surfacesJ Farley Norman
Department of Psychology, Western Kentucky University, Bowling Green, Kentucky 42101, USA
Percept Psychophys 66:77-88. 2004..The individual differences and failures of perceptual constancy that were obtained indicate that there is no single relationship between physical and perceived distances on 3-D surfaces that is consistent across observers... - The visual perception of rigid motion from constant flow fieldsV J Perotti
Department of Psychology, Ohio State University, Columbus 43210, USA
Percept Psychophys 58:666-79. 1996.... - The discriminability of local surface structureJ F Norman
Department of Psychology, Ohio State University, Columbus 43210, USA
Perception 25:381-98. 1996..This qualitative difference between the perception of depth intervals and surface-orientation differences suggests that knowledge of depths and orientations may be represented separately within the human visual system... - The temporal course of suppression during binocular rivalryH F Norman
Department of Psychology, Western Kentucky University, Bowling Green 42101, USA
Perception 29:831-41. 2000..Despite these differences in the strength of suppression, the results of both experiments show that the temporal characteristics of motion and static rivalry are essentially identical... - Integration of binocular stereopsis and structure from motion in the discrimination of noisy surfacesJ S Tittle
Department of Psychology, Ohio State University, Columbus 43201 1222, USA
J Exp Psychol Hum Percept Perform 23:1035-49. 1997..This pattern of results is consistent with the existence of multiple stereoscopic mechanisms suggested by psychophysical and neurophysiological data... - Effects of texture, illumination, and surface reflectance on stereoscopic shape perceptionJ T Todd
Department of Psychology, Ohio State University, Columbus 43210, USA
Perception 26:807-22. 1997..The direction of illumination had no detectable effect on the observers' judgments... - The perception of scale-dependent and scale-independent surface structure from binocular disparity, texture, and shadingJ S Tittle
Department of Psychology, Ohio State University, Columbus 43210 1222, USA
Perception 27:147-66. 1998..This finding suggests that, for the case of linear integration, multiple cues to three-dimensional structure do not combine on the basis of a single type of representation shared by all the 'shape-from-X' processes in the visual system... - On the relative salience of Euclidean, affine, and topological structure for 3-D form discriminationJ T Todd
Department of Psychology, Ohio State University, Columbus 43210, USA
Perception 27:273-82. 1998..These findings suggest that the relative perceptual salience of object properties may be systematically related to their structural stability under change, in a manner that is similar to the Klein hierarchy of geometries... - The visual perception of 3-D shape from multiple cues: are observers capable of perceiving metric structure?James T Todd
Department of Psychology, Ohio State University, Columbus, Ohio 43210, USA
Percept Psychophys 65:31-47. 2003..When considered in conjunction with other, similar reports in the literature, these findings provide strong evidence that human observers do not have accurate perceptions of 3-D metric structure... - Perception of three-dimensional shape from specular highlights, deformations of shading, and other types of visual informationJ Farley Norman
Department of Psychology, Western Kentucky University
Psychol Sci 15:565-70. 2004.... - Information concentration along the boundary contours of naturally shaped solid objectsJ F Norman
Department of Psychology, Western Kentucky University, Bowling Green 42101-3576, USA
Perception 30:1285-94. 2001.... - Attention to 3-D shape, 3-D motion, and texture in 3-D structure from motion displaysHendrik Peuskens
K.U. Leuven, Medical School, Belgium
J Cogn Neurosci 16:665-82. 2004.... - Poor shape perception is the reason reaches-to-grasp are visually guided onlineYoung lim Lee
Indiana University, Bloomington, Indiana 47405 7007, USA
Percept Psychophys 70:1032-46. 2008..We conclude that shape perception is not calibrated by feedback from reaches-to-grasp and that online visual guidance is required for accurate grasping because shape perception is poor... - Anterior regions of monkey parietal cortex process visual 3D shapeJean Baptiste Durand
Lab Neuro en Psychofysiologie, K U Leuven, Medical School, Campus Gasthuisberg, Herestraat 49, B 3000, Leuven, Belgium
Neuron 55:493-505. 2007..These results indicate that extracting 3D spatial information from stereo involves several intraparietal areas, among which AIP and anterior LIP are more specifically engaged in extracting the 3D shape of objects... - Lightness constancy in the presence of specular highlightsJames T Todd
Ohio State University, USA
Psychol Sci 15:33-9. 2004..The results revealed that observers are able to discount the presence of specular highlights so that the relative lightness among different regions is determined almost entirely by the diffuse component of surface reflectance...