28 Attention influences visual processing in striate and extrastriate cortex, which has been extensively 29 studied for spatial-, object-, and feature-based attention. Most studies exploring neural signatures of 30 feature based attention have trained animals to attend to an object identified by a certain feature and 31 ignore objects/displays that were identified by a different feature. Little...

Do not quote without permission. Note: Potential references to other articles in the encyclopedia are indicated by {}. These should be checked against the actual contents of other articles before publication. B r a i n a r d 2 A b s t r a c t Color vision is the ability to distinguish and identify lights and objects on the basis of their spectral properties. This entry presents several topics t...

The ability to utilize color information was investigated in 12 patients with mild to moderate probable Alzheimer's Disease (DAT) and in 12 age- and gender-matched control subjects. All subjects underwent testing of visual acuity and color vision before being tested with a cognitive task consisting of four conditions (no color, color as attention enhancer, color as valid cue, color as distracte...

Logvinenko’s color atlas theory provides a structure in which a complete set of color-equivalent material and illumination pairs can be generated to match any given input RGB color. In chromaticity space, the set of such pairs forms a 2-dimensional manifold embedded in a 4-dimensional space. For singleilluminant scenes, the illumination for different input RGB values must be contained in all th...

Attention influences visual processing in striate and extrastriate cortex, which has been extensively studied for spatial-, object-, and feature-based attention. Most studies exploring neural signatures of feature-based attention have trained animals to attend to an object identified by a certain feature and ignore objects/displays identified by a different feature. Little is known about the ef...

Perceived color at a point in space is not determined simply by the color directly stimulating the corresponding retinal position. Surface color is informed by flanking edge signals, which also serve to inhibit the intrusion of signals from neighboring surfaces. Spatially continuous local interactions among color and luminance signals have been implicated in a propagation process often referred...

The Stroop Effect is the decreased accuracy and increased response times observed when participants are asked to indicate the printed color of a word that is itself a conflicting or incongruous color-word (respond “blue” to RED printed in blue), compared to color-naming of congruous words or control stimuli (BLUE or XXXX respectively, both printed in blue). Congruous trials (matching word color...

Working memory for color has been the central focus in an ongoing debate concerning the structure and limits of visual working memory. Within this area, the delayed estimation task has played a key role. An implicit assumption in color working memory research generally, and delayed estimation in particular, is that the fidelity of memory does not depend on color value (and, relatedly, that expe...

The Stroop Effect is the decreased accuracy and increased response times observed when participants are asked to indicate the printed color of a word that is itself a conflicting or incongruous color-word (respond “blue” to RED printed in blue), compared to color-naming of congruous words or control stimuli (BLUE or XXXX respectively, both printed in blue). Congruous trials (matching word color...

Presented are intra- and inter-observer variability data comparing the unique-hue (UH) selections of sets of males and females, using two different visual experimental procedures incorporating Munsell color chips of varying hue but identical chroma and value. Although 34 of the 40 Munsell hue chips were selected by at least one observer as a UH, selections were generally repeatable. In addition...