scholarly journals Delboeuf “illusions” of circle size induced via photoflash-generated afterimages

1977 ◽  
Vol 22 (2) ◽  
pp. 171-176 ◽  
Author(s):  
William J. O’Halloran ◽  
Daniel J. Weintraub
Keyword(s):  
Circle Size

Insufficient consensus regarding circle size and bone loss width using the ratio—“best fit circle”—method even with three-dimensional computed tomography

2019 ◽  
Vol 27 (10) ◽  
pp. 3222-3229 ◽  
Author(s):  
Lucca Lacheta ◽  
Elmar Herbst ◽  
Andreas Voss ◽  
Sepp Braun ◽  
Pia Jungmann ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Bone Loss ◽  
Circle Method ◽  
Three Dimensional ◽  
Circle Size ◽  
Best Fit

Can estimation of circle size be influenced by instructions?

Cartography ◽  
1980 ◽  
Vol 11 (3) ◽  
pp. 175-180 ◽  
Author(s):  
K.W. Maddock ◽  
Boris Crassini
Keyword(s):  
Circle Size

scholarly journals A horse's eye view: size and shape discrimination compared with other mammals

2015 ◽  
Vol 11 (11) ◽  
pp. 20150701 ◽  
Author(s):  
Masaki Tomonaga ◽  
Kiyonori Kumazaki ◽  
Florine Camus ◽  
Sophie Nicod ◽  
Carlos Pereira ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Cognitive Abilities ◽  
Visual Discrimination ◽  
Natural Environments ◽  
Perceptual Similarity ◽  
Shape Discrimination ◽  
Size And Shape ◽  
Circle Size ◽  
Computer Controlled

Mammals have adapted to a variety of natural environments from underwater to aerial and these different adaptations have affected their specific perceptive and cognitive abilities. This study used a computer-controlled touchscreen system to examine the visual discrimination abilities of horses, particularly regarding size and shape, and compared the results with those from chimpanzee, human and dolphin studies. Horses were able to discriminate a difference of 14% in circle size but showed worse discrimination thresholds than chimpanzees and humans; these differences cannot be explained by visual acuity. Furthermore, the present findings indicate that all species use length cues rather than area cues to discriminate size. In terms of shape discrimination, horses exhibited perceptual similarities among shapes with curvatures, vertical/horizontal lines and diagonal lines, and the relative contributions of each feature to perceptual similarity in horses differed from those for chimpanzees, humans and dolphins. Horses pay more attention to local components than to global shapes.

scholarly journals Circle size and diameter tilt: A new look at integrality and separability

1998 ◽  
Vol 60 (1) ◽  
pp. 101-112 ◽  
Author(s):  
Bonnie C. Potts ◽  
Robert D. Melara ◽  
Lawrence E. Marks
Keyword(s):  
Circle Size ◽  
New Look

Subject Differences in Exponents of Psychophysical Power Functions

1966 ◽  
Vol 23 (3_suppl) ◽  
pp. 1125-1126 ◽  
Author(s):  
Stanley J. Rule
Keyword(s):  
Magnitude Estimation ◽  
Line Length ◽  
Power Functions ◽  
Circle Size ◽  
Subject Differences

Psychophysical power functions were obtained from magnitude estimation of circle size, numerousness, and line length for each of 36 Ss. Correlations for individual exponents were found between continua. The findings supported the hypothesis that an individual exhibits a characteristic range of responses in magnitude estimation tasks.

Is Stimulus Structure in the Mind's Eye? An Examination of Dimensional Structure in Iconic Memory

1987 ◽  
Vol 39 (3) ◽  
pp. 385-408 ◽  
Author(s):  
Barbara Burns
Keyword(s):  
Iconic Memory ◽  
Feature Integration ◽  
Partial Report ◽  
Dimensional Structure ◽  
Radial Line ◽  
Perceptual Development ◽  
Circle Size ◽  
Initial Processing ◽  
Mind's Eye

Three experiments examined integral and separable dimensions as attentional selective cues from iconic memory. Sperling's partial-report task was employed with physically separable and physically integral stimuli. Stimulus displays were varied in terms of the redundancy of the irrelevant non-cued dimensions—i.e. control, correlated, and orthogonal conditions within Garner's (1974a) framework—and selective readout performance was measured. The results demonstrate that, in initial processing, physically separable dimensions (e.g., circle size vs. angle of radial line) can be selectively attended to as independent dimensions, but physically integral dimensions (e.g., size vs. brightness and height vs. width) can only be represented as wholistic integral objects. Implications of these findings for current models of feature integration and perceptual development are discussed.

scholarly journals Calculation of the mean circle size does not circumvent the bottleneck of crowding

2012 ◽  
Vol 12 (11) ◽  
pp. 13-13 ◽  
Author(s):  
H. Banno ◽  
J. Saiki
Keyword(s):  
Circle Size ◽  
The Mean

Circle size discrimination and transposition behaviour in cichlid fish

1969 ◽  
Vol 17 ◽  
pp. 155-158 ◽  
Author(s):  
R.F. Mark ◽  
Alan Maxwell
Keyword(s):  
Cichlid Fish ◽  
Size Discrimination ◽  
Circle Size

Circle size by fusion of pyramidal transform data

2001 ◽  
Author(s):  
M. Hamm
Keyword(s):  
Circle Size
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