Differences between the processes required for visual search and texture segregation may also explain why combinations of image elements that permit effortless texture segregation do not always give rise to parallel search and, vice versa, why image elements that can be searched in parallel do not always permit texture segregation (Wolfe, 1992).
We thus studied the segregation of visual functional networks in congenitally blind subjects based on the three retinotopic mapping principles of the intact visual cortex: eccentricity, laterality and elevation, which together constitute the complete mapping of the visual field.
On fresh state, T500 slump flow time, slump flow diameter, V-funnel time, static penetration resistance, sieve segregation and visual stability index tests were performed.
Like the other cortical areas, V1 has a laminar organization with specialization for input from the relayed retinal afferents, output to the higher visual areas, and the segregation of the magno (motion) and parvo (form) pathways.
Property Air content Unit weight (kg/m3) Slump (mm) Slump flow (mm) J-ring (mm) Visual stability index Static segregation column L-box CC 5.0 2370 100 – – – – – SCC 5.9 2360 – 620a 585 1b 3.5c 81.7d aA common range of slump flow for SCC is 450 760 mm (ACI 237R 2007).
In short, the time course of neural persistence suggests an early component that reflects a high degree of face-selectivity and a later component that reflects persistence in the absence of a strong motion cue to the segregation of visual form.
Phenotypes were verified by visual inspection, breeder reports, segregation in families and photographs (Fig. 2).
While the functional segregation of visual field quadrants in OR bundles is well established, it remains unclear whether these projections reach beyond primary visual cortex (V1).
We will discuss tasks that probe binding and object perception, but we will initially stay away from visual search and texture segregation, tasks that have been used to measure the efficiency of feature binding in previous work (e.g., Treisman & Gelade, 1980; Wolfe, 1994).
Needham (2001, this issue) reports that 4.5-month-old infants can use a short-term familiarization experience with a single object to facilitate the segregation of a visual display consisting of a configurally similar object and a configurally dissimilar adjacent object.
