Katherine E.M. Tregillus

Katherine E.M. Tregillus
University of Nevada, Reno | UNR · Department of Psychology

In Progress: Doctor of Philosophy, Psychology

About

27
Publications
1,023
Reads
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51
Citations
Additional affiliations
June 2016 - present
Nanyang Technological University
Position
  • Summer Fellowship Researcher
August 2012 - present
University of Nevada, Reno
Position
  • Graduate Researcher
May 2009 - May 2012
Colorado State University
Position
  • Undergraduate Research Assistant

Publications

Publications (27)
Article
Full-text available
Many forms of color adaptation have been found to reflect both short- and long-term adjustments. We explored the buildup and decay of adaptation to chromatic contrast (temporal modulations of color) for which the dynamics are unknown. A matching task was used to track the perceived contrast of chromatic pulses of varying physical contrast during an...
Article
Full-text available
Color appearance is effectively compensated for the progressive yellowing of the lens with age, but the time course and mechanisms of these adjustments remain poorly understood. We examined how observers adapted to the sudden introduction of an "aged lens" by wearing glasses with yellow filters that approximated the average lens transmittance of a...
Preprint
When the visual environment changes, vision adapts in order to maintain accurate perception. For repeatedly encountered environmental changes, the visual system may learn to adjust immediately, a process called visual mode switching. For example, following experience with red glasses, participants report the redness of glasses fades instantly when...
Conference Paper
Full-text available
Blur is a fundamental perceptual attribute of images, but the way in which the visual system encodes this attribute remains poorly understood. Previously, we examined the neural correlates of blur by measuring BOLD responses to in-focus images and their blurred or sharpened counterparts, formed by varying the slope of the amplitude spectra but main...
Article
The McCollough Effect is a color aftereffect produced by exposure to colored, oriented patterns. For example, following adaptation to vertical red and horizontal green stripes in alternation, vertical black and white patterns appear greenish, while horizontal black and white patterns appear reddish. The striking aspect of the McCollough Effect is t...
Article
Anomalous trichromacy is a form of color vision deficiency characterized by the presence of three cone types, but with shifted spectral sensitivities for L or M cones, causing a red-green color deficiency. However, long-term adaptation to this impoverished opponent input may allow for a more normal color experience at the suprathreshold level (“com...
Article
Full-text available
Anomalous trichromacy is a common form of congenital color deficiency resulting from a genetic alteration in the photopigments of the eye’s light receptors. The changes reduce sensitivity to reddish and greenish hues, yet previous work suggests that these observers may experience the world to be more colorful than their altered receptor sensitiviti...
Article
Full-text available
When the environment changes, vision adapts to maintain accurate perception. For repeatedly encountered environments, learning to adjust more rapidly would be beneficial, but past work remains inconclusive. We tested if the visual system can learn such visual mode switching for a strongly color-tinted environment, where adaptation causes the domina...
Preprint
Full-text available
Anomalous trichromacy is a common form of congenital color-deficiency resulting from a genetic alteration in the photopigments of the eye's light receptors. The changes reduce sensitivity to reddish-greenish hues, yet previous work suggests that these observers may experience the world to be more colorful than their altered receptor sensitivities w...
Preprint
Full-text available
When the environment changes, vision adapts to maintain accurate perception. For repeatedly encountered environments, learning to switch immediately to prior adaptive states would be beneficial, but past work remains inconclusive. We tested if the visual system can learn such visual mode switching for a strongly tinted environment, where adaptation...
Article
In order to better understand how our visual system processes information, we must understand the underlying brain connectivity architecture, and how it can get reorganized under visual deprivation. The full extent to which visual development and visual loss affect connectivity is not well known. To investigate the effect of the onset of blindness...
Article
Full-text available
When the environment changes, the visual system adjusts to maintain accurate color perception. Such adaptations happen at different time scales, and long-term effects are of particular interest because they may engage mechanisms of long-lasting neural plasticity. Long-term adaptation to changes in the color of the environment produce strong and lon...
Article
Many techniques have been developed to visualize how an image would appear to an individual with a different visual sensitivity: e.g., because of optical or age differences, or a color deficiency or disease. This protocol describes a technique for incorporating sensory adaptation into the simulations. The protocol is illustrated with the example of...
Article
It has been demonstrated that motion aftereffects can transfer across perceptual modalities. For example, the motion aftereffect induced by a visual stimulus can affect the perceived motion direction of an auditory stimulus. Although cross-modal adaptation has been demonstrated from the visual to the auditory domain, aftereffects have not been cons...
Article
Color perception is known to remain largely stable across the lifespan despite the pronounced changes in sensitivity from factors such as the progressive brunescence of the lens. However, the mechanisms and timescales controlling these compensatory adjustments are still poorly understood. In a series of experiments, we tracked adaptation in observe...
Article
We describe a method for representing and manipulating the color gamuts used by different artists to explore how the color schemes employed by artists might appear to the artist or to others. The method involves modeling the visual response to color and then adapting that response to simulate how color percepts change across different states of ada...
Conference Paper
Full-text available
We describe a method for representing and manipulating the color gamuts used by different artists to explore how the color schemes employed by artists might appear to the artist or to others. The method involves modeling the visual response to color and then adapting that response to simulate how color percepts change across different states of ada...
Conference Paper
Many visual attributes appear to be encoded by a norm-based code in which the stimulus is represented by how it deviates from an average or neutral value (the norm). One prediction of these codes is that neural responses should be weaker for stimuli near the norm and stronger for uncharacteristic stimuli, a pattern that has been shown for a variety...
Article
Many lightness illusions reflect the discounting of shadows and shading by the visual system so that equivalent luminances appear as different lightnesses; or conversely, cases where shadows are not discounted because they are instead misperceived as surfaces. We explored a novel form of these illusions created simply by mirroring side-lit objects....

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