The shape and size of crowding for moving targets
نویسندگان
چکیده
Our ability to identify alphanumeric characters can be impaired by the presence of nearby features, especially when the target is presented in the peripheral visual field, a phenomenon is known as crowding. We measured the effects of motion on acuity and on the spatial extent of crowding. In line with many previous studies, acuity decreased and crowding increased with eccentricity. Acuity also decreased for moving targets, but the absolute size of crowding zones remained relatively invariant of speed at each eccentricity. The two-dimensional shape of crowding zones was measured with a single flanking element on each side of the target. Crowding zones were elongated radially about central vision, relative to tangential zones, and were also asymmetrical: a more peripheral flanking element crowded more effectively than a more foveal one; and a flanking element that moved ahead of the target crowded more effectively than one that trailed behind it. These results reveal asymmetrical space-time dependent regions of visual integration that are radially organised about central vision.
منابع مشابه
The relationship between the tooth size, arch dimensions and dental crowding
In this study two groups of dental study models were selected to evaluate the relationship between the tooth size, arch dimensions , and dental crowding. The first group consisting of 56 pairs of dental study models (28 males and 28 females) with normal occlusion ( without dental crowding) ranging in age from 16 to 20 years, were selected among 4445 students from Kerman by multi stage rando...
متن کاملOptimal Observer Path Planning For Bearings-Only Moving Targets Tracking Using Chebyshev Polynomials
In this paper, an optimization problem for the observer trajectory in the bearings-only surface moving target tracking (BOT) is studied. The BOT depends directly on the observability of the target's position in the target/observer geometry or the optimal observer maneuver. Therefore, the maximum lower band of the Fisher information matrix is opted as an independent criterion of the target estim...
متن کاملEffect of Curved Path Monopulse Radar Platform’s Grazing Angle on Height of Floated Targets Detection
Monopulse radarsare one of the most accurate tracking radars used to guide various platforms. Detection and tracking of surface targets with these radars are performed in order to point strike targets. Sea clutter presents challenges for detecting floated targets and in addition to affecting detection height, it can cause errors in monopulse angle finding. In this paper, the airborne monopulse ...
متن کاملInvestigating Cross-Cultural Differences in the Privacy Regulation and Perception of Crowding (Northern and Kurdish Women in Iran)
This study investigated cross-cultural differences in the privacy regulation and perception of crowding amongtwo Iranian sub-cultures (Kurdish and Northern women).The primary purpose of this study was to examine whether Northern and Kurdish women differed in their desired and achieved levels of privacy in parks. The second purpose of this study was to investigate the relationships between the d...
متن کاملEffects of Temporal Modulation on Crowding, Visual Span, and Reading.
PURPOSE Crowding, the increased difficulty in recognizing a target due to the proximity of adjacent objects, is identified as the main sensory constraint for the size of the visual span (the number of letters recognized without moving the eyes) and reading speed in peripheral vision. The goal of the present study is to assess the impact of temporal modulation on crowding, visual span, and readi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Vision Research
دوره 43 شماره
صفحات -
تاریخ انتشار 2003