The foveal ‘crowding’ effect: physics or physiology?
نویسندگان
چکیده
منابع مشابه
The foveal ‘crowding’ effect: physics or physiology?
It has been known for some time that both foveal and peripheral visual acuity is higher for single letters than for letters in a row. Early work showed that this was due to the destructive interaction of adjacent contours (termed 'crowding' or contour interaction). It has been assumed to have a neural basis and a number of competing explanations have been advanced which implicate either high-le...
متن کاملUncovering foveal crowding?
Visual crowding, as context modulation, reduce the ability to recognize objects in clutter, sets a fundamental limit on visual perception and object recognition. It's considered that crowding does not exist in the fovea and extensive efforts explored crowding in the periphery revealed various models that consider several aspects of spatial processing. Studies showed that spatial and temporal cr...
متن کاملFoveal target repetitions reduce crowding.
Crowding is the limitation of peripheral vision by clutter. Objects that are easily identified when presented in isolation are hard to identify when presented flanked by similar close-by objects. It is often assumed that the signal of a crowded target is irretrievably lost because it is combined with the signals of the flankers. Here, we asked whether a target signal can be enhanced (or retriev...
متن کاملFoveal crowding differs in children and adults.
We used custom-designed acuity tests to compare the magnitude and extent of crowded letter recognition in children and adults. Visual acuity (logMAR) was measured monocularly in children and adults using five custom-designed letter tests with varying degrees of crowding: single letter, single letter surrounded by four flanking bars, single letter surrounded by four flanking letters, line of fiv...
متن کاملCan the amplitude difference spectrum peak frequency explain the foveal crowding effect?
Hess et al. (Vision Res. 40 (2000) 365) found that the peak frequency of the amplitude difference spectrum (ADS) of a Landolt C/flanking bar configuration was higher than that of an isolated C. They believed that this mismatch in the dominant frequency components could account for the foveal crowding effect. The following empirical and theoretical studies were conducted to evaluate this new exp...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Vision Research
سال: 2000
ISSN: 0042-6989
DOI: 10.1016/s0042-6989(99)00193-5