Shape perception judgments as a function of stimulus orientation, stimulus background, and perceptual style.

1970 ◽  
Author(s):  
Edward W. Fredrickson
Keyword(s):  
Shape Perception ◽  
Stimulus Orientation ◽  
Perceptual Style ◽  
Orientation Stimulus

scholarly journals Effects of Line Separation and Exploration on the Visual and Haptic Detection of Symmetry and Repetition

2016 ◽  
Vol 63 (4) ◽  
pp. 197-214 ◽  
Author(s):  
Rebecca Lawson ◽  
Henna Ajvani ◽  
Stefano Cecchetto
Keyword(s):  
External World ◽  
Shape Perception ◽  
The Body ◽  
Stimulus Orientation ◽  
Body Midline ◽  
Symmetry Detection ◽  
Multiple Objects ◽  
Repetition Detection ◽  
Line Separation

Abstract. Detection of regularities (e.g., symmetry, repetition) can be used to investigate object and shape perception. Symmetry and nearby lines may both signal that one object is present, so moving lines apart may disrupt symmetry detection, while repetition may signal that multiple objects are present. Participants discriminated symmetrical/irregular and repeated/irregular pairs of lines. For vision, as predicted, increased line separation disrupted symmetry detection more than repetition detection. For haptics, symmetry and repetition detection were similarly disrupted by increased line separation; also, symmetry was easier to detect than repetition for one-handed exploration and for body midline-aligned stimuli, whereas symmetry was harder to detect than repetition with two-handed exploration of stimuli oriented across the body. These effects of exploration and stimulus orientation show the influence of modality-specific processing rather than properties of the external world on regularity detection. These processes may, in turn, provide insights into the nature of objectness in vision and in touch.

Menstrual cycle affects kinesthetic aftereffect, an index of personality and perceptual style.

1979 ◽  
Vol 37 (2) ◽  
pp. 234-246 ◽  
Author(s):  
A. Harvey Baker ◽  
Brian L. Mishara ◽  
Irene W. Kostin ◽  
Laurence Parker
Keyword(s):  
Menstrual Cycle ◽  
Perceptual Style

Modifying Perceived Size of a Handled Object through Hand Image Deformation

2013 ◽  
Vol 22 (3) ◽  
pp. 255-270 ◽  
Author(s):  
Yuki Ban ◽  
Takuji Narumi ◽  
Tomohiro Tanikawa ◽  
Michitaka Hirose
Keyword(s):  
Visual Representation ◽  
Shape Perception ◽  
Size Perception ◽  
Visual Object ◽  
Display System ◽  
Haptic Interaction ◽  
Image Deformation ◽  
Virtual Objects ◽  
The Difference ◽  
Hand Image

In this study, we aim to construct a perception-based shape display system to provide users with the sensation of touching virtual objects of varying shapes using only a simple mechanism. Thus far, we have proved that identified curved surface shapes or edge angles can be modified by displacing the visual representation of the user's hand. However, using this method, we cannot emulate multifinger touch, because of spatial unconformity. To solve this problem, we focus on modifying the identification of shapes using two fingers by deforming the visual representation of the user's hand. We devised a video see-through system that enables us to change the perceived shape of an object that a user is touching visually. The visual representation of the user's hand is deformed as if the user were handling a visual object; however, the user is actually handling an object of a different shape. Using this system, we conducted two experiments to investigate the effects of visuo-haptic interaction and evaluate its effectiveness. One is an investigation on the modification of size perception to confirm that the fingers did not stroke the shape but only touched it statically. The other is an investigation on the modification of shape perception for confirming that the fingers dynamically stroked the surface of the shape. The results of these experiments show that the perceived sizes of objects handled using a thumb and other finger(s) could be modified if the difference between the size of physical and visual stimuli was in the −40% to 35% range. In addition, we found that the algorithm can create an effect of shape perception modification when users stroke the shape with multiple fingers.

scholarly journals The Representation of Stimulus Orientation in the Early Stages of Somatosensory Processing

2008 ◽  
Vol 28 (3) ◽  
pp. 776-786 ◽  
Author(s):  
S. J. Bensmaia ◽  
P. V. Denchev ◽  
J. F. Dammann ◽  
J. C. Craig ◽  
S. S. Hsiao
Keyword(s):  
Stimulus Orientation ◽  
Somatosensory Processing ◽  
Early Stages

Effect of Perceptual Style Strength on Acquisition of a Novel Motor Task

1987 ◽  
Vol 65 (3) ◽  
pp. 743-747
Author(s):  
Cathy Buell ◽  
Frank Pettigrew ◽  
Stephen Langendorfer
Keyword(s):  
Learning Style ◽  
Motor Task ◽  
Tennis Ball ◽  
Learning Style Inventory ◽  
Bottom Quartile ◽  
Perceptual Style ◽  
Perceptual Preferences ◽  
Group 3 ◽  
Group 2 ◽  
Perceptual Preference

The purpose of this study was to investigate the effect of the strength of perceptual style preference on the acquisition of a novel motor task. The Physical Needs element of the Learning Style Inventory was administered to 98 students, 14 to 15 yr. old, to determine the strength of their perceptual preferences for processing auditory, visual, and kinesthetic/tactile information. Subjects practiced the tennis-ball basket-bounce test as a novel task 8 times (3 practice and 5 test trials) per day for 9 days. Subjects were grouped according to the strength of their perceptual preferences: Group 1 ( n = 15) in the top quartile on all perceptual modes; Group 2 ( n = 16) at the median on all modes; and Group 3 ( n = 14) in the bottom quartile on all modes. Scores on the ball-bounce task were compared across groups using a 3 (groups) × 9 (days) analysis of variance. There were over-all significant differences between perceptual-preference groups and across days, but no significant interaction was detected. The composite strength of perceptual-style preference as measured is potentially important in acquisition of this motor skill.

Dizziness and Perceptual Style

1989 ◽  
Vol 51 (4) ◽  
pp. 169-174 ◽  
Author(s):  
K. O’Connor ◽  
C. Chambers ◽  
R. Hinchcliffe
Keyword(s):  
Perceptual Style
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