Regional distribution of the mechanisms that underlie spatial localization

• Published in: Vision research (Oxford) Vol. 30; no. 7; pp. 1021 - 1031
• Main Authors: Hess, R.F., Watt, R.J.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1990; Elsevier Science
• Subjects: Biological and medical sciences; Contrast Sensitivity - physiology; Fovea Centralis - physiology; Fundamental and applied biological sciences. Psychology; Humans; Localization Hyperacuity Eccentricity Filters Cones; Mathematics; Models, Neurological; Pattern Recognition, Visual - physiology; Perception; Psychology. Psychoanalysis. Psychiatry; Psychology. Psychophysiology; Retina - physiology; Sensory Thresholds - physiology; Vision; Localization Hyperacuity Eccentricity Filters Cones; Human; Cone; Eccentricity; Stimulus localization; Peripheral vision; Visual acuity; Retina; Space perception; Visual perception
• ISSN: 0042-6989; 1878-5646
• DOI: 10.1016/0042-6989(90)90112-X

In order to understand the regional distribution of the mechanisms which underlie localization accuracy we (1) chose a task which is known to involve localization accuracy (2) optimized stimulus parameters for eccentric loci and (3) determined how two key spatial factors which affect localization accuracy vary as a function of eccentricity. These involve Gaussian blur and Gaussian jitter. These results suggest that there are three different functions with eccentricity for the mechanisms underlying this task which we relate to the spatial properties of the retina, namely mean cone density, receptoral convergence and regularity.