‘Peak Preference’ and Waveform Perception

Perception ◽  
1983 ◽  
Vol 12 (3) ◽  
pp. 255-267 ◽  
Author(s):  
Peter K Chadwick
Keyword(s):  
Visual System ◽  
Vision Research ◽  
Spatial Filtering ◽  
Natural Setting ◽  
Ecological Significance

Because the perception of waveforms has been relatively neglected in vision research, one phenomenon of waveform perception, the parsing of waves into peak-shaped rather than trough-shaped segments, is examined. It is suggested that this so-called ‘peak preference’ is a grouping rule which can determine figure—background segregation in some circumstances. It appears to resist explanation in terms of the spatial-filtering properties of the visual system. For a complete explanation of peak preference, the ecological significance for actions that wave stimuli would normally have in the natural setting has to be considered.

scholarly journals Quantitative Analysis of Illusory Movement: Spatial Filtering and Line Localization in the Human Visual System

Perception ◽  
10.1068/p7716 ◽  
2014 ◽  
Vol 43 (12) ◽  
pp. 1329-1340 ◽  
Author(s):  
Nomdo M Jansonius ◽  
Lucas Stam ◽  
Tim de Jong ◽  
Ben A Pijpker
Keyword(s):  
Quantitative Analysis ◽  
Visual System ◽  
Human Visual System ◽  
Spatial Filtering ◽  
Illusory Movement

A large-field screen with even texture for vision research

1989 ◽  
Vol 2 (4) ◽  
pp. 415-417 ◽  
Author(s):  
Charles Crist ◽  
David Lee Robinson
Keyword(s):  
Visual System ◽  
Vision Research ◽  
Smooth Surface ◽  
Vacuum System ◽  
Large Field ◽  
Visual Behavior ◽  
Uniform Illumination ◽  
Uniformly Smooth ◽  
Light Diffusion ◽  
Central Visual System

AbstractStudies of the physiology of the central visual system and visual behavior frequently require large tangent screens, and it has been difficult to create a smooth surface with uniform illumination. We have developed a technique for holding drafting paper on a sheet of acrylic so that it can be used as a tangent screen for both front and rear projections. The process utilizes a vacuum system that holds the paper firmly and produces a uniformly smooth surface with good light diffusion; it is simple, flexible, and inexpensive and can be used for any size screens.

scholarly journals Is There Visual Lateralisation of the Sun Compass in Homing Pigeons?

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 740 ◽  
Author(s):  
Charlotte Griffiths ◽  
Richard Holland ◽  
Anna Gagliardo
Keyword(s):  
Visual System ◽  
Right Hemisphere ◽  
Natural Setting ◽  
The Sun ◽  
Sun Compass ◽  
Homing Pigeons ◽  
Significant Difference ◽  
Conflict Condition ◽  
The Right ◽  
Cue Conflict

Functional lateralisation in the avian visual system can be easily studied by testing monocularly occluded birds. The sun compass is a critical source of navigational information in birds, but studies of visual asymmetry have focussed on cues in a laboratory rather than a natural setting. We investigate functional lateralisation of sun compass use in the visual system of homing pigeons trained to locate food in an outdoor octagonal arena, with a coloured beacon in each sector and a view of the sun. The arena was rotated to introduce a cue conflict, and the experimental groups, a binocular treatment and two monocular treatments, were tested for their directional choice. We found no significant difference in test orientation between the treatments, with all groups showing evidence of both sun compass and beacon use, suggesting no complete functional lateralisation of sun compass use within the visual system. However, reduced directional consistency of binocular vs. monocular birds may reveal a conflict between the two hemispheres in a cue conflict condition. Birds using the right hemisphere were more likely to choose the intermediate sector between the training sector and the shifted training beacon, suggesting a possible asymmetry in favour of the left eye/right hemisphere (LE/RH) when integrating different cues.

scholarly journals What the Salamander Eye Has Been Telling the Vision Scientist’s Brain

2020 ◽  
Author(s):  
Fernando Rozenblit ◽  
Tim Gollisch
Keyword(s):  
Visual System ◽  
Vision Research ◽  
Vision Science ◽  
Vertebrate Retina ◽  
Animal System ◽  
Future Vision

Salamanders have been habitual residents of research laboratories for more than a century, and their history in science is tightly interwoven with vision research. Nevertheless, many vision scientists – even those working with salamanders – may be unaware of how much our knowledge about vision, and particularly the retina, has been shaped by studying salamanders. In this review, we take a tour through the salamander history in vision science, highlighting the main contributions of salamanders to our understanding of the vertebrate retina. We further point out specificities of the salamander visual system and discuss the perspectives of this animal system for future vision research.

scholarly journals What the Salamander Eye Has Been Telling the Vision Scientist’s Brain

2020 ◽  
Author(s):  
Fernando Rozenblit ◽  
Tim Gollisch
Keyword(s):  
Visual System ◽  
Vision Research ◽  
Vision Science ◽  
Vertebrate Retina ◽  
Animal System ◽  
Future Vision

Salamanders have been habitual residents of research laboratories for more than a century, and their history in science is tightly interwoven with vision research. Nevertheless, many vision scientists – even those working with salamanders – may be unaware of how much our knowledge about vision, and particularly the retina, has been shaped by studying salamanders. In this review, we take a tour through the salamander history in vision science, highlighting the main contributions of salamanders to our understanding of the vertebrate retina. We further point out specificities of the salamander visual system and discuss the perspectives of this animal system for future vision research.

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