Results 291 to 300 of about 439,030 (331)

TEMPORAL SUMMATION AND ABSOLUTE BRIGHTNESS THRESHOLDS

British Journal of Mathematical and Statistical Psychology, 1967
Three normative models based on the Change Detector analogies of Shallice (1964) are investigated to see how well they account for the integration of input over time that occurs in absolute brightness threshold experiments. Of the three, the geometric moving average receives no support. The perceptual moment and moving average models give about equally
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Absolute Threshold for Electric Shock

Nature, 1962
FOR some time it has been suspected that the most relevant parameter when using electric shock as a stimulus is the applied wattage. Forbes and Bernstein1, Gilmer2, Hill et al.3, Campbell and Teghtsoonian4, Green5, all found evidence to support this contention.
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Absolute auditory thresholds in monkeys and humans

The Journal of the Acoustical Society of America, 1982
To determine the limitations imposed by the auditory system on the processing of species-specific vocalizations we have conducted a variety of psychoacoustic tests with different monkey species. This paper summarizes measurements of absolute auditory thresholds for three monkey species—the Japanese macaque (Macaca fuscata), de Brazza's monkey ...
Steven L. Hopp, Magne J. Owren, Michael R. Petersen, Joan M. Sinnott   +3 more
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Absolute Behavioral Auditory Thresholds in Mice

The Journal of the Acoustical Society of America, 1963
The experiment was designed to obtain behavioral measures of absolute auditory thresholds and to compare them with cochlear potentials and with single-unit eighth-nerve-fiber thresholds. Mice were selected because certain strains display pathological conditions that appear similar to some congenital auditory defects found in humans.
Robert J. Ruben, Dickens Warfield
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Modeling Luminance Perception at Absolute Threshold

Computer Graphics Forum, 2015
AbstractWhen human luminance perception operates close to its absolute threshold, i. e., the lowest perceivable absolute values, appearance changes substantially compared to common photopic or scotopic vision. In particular, most observers report perceiving temporally‐varying noise.
Hans-Peter Seidel, Elmar Eisemann, Tobias Ritschel, Karol Myszkowski, Petr Kellnhofer   +4 more
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Absolute Threshold for Extremely Wide Fields

Journal of the Optical Society of America, 1958
The absolute visual threshold for an area 40° by 100° visual angle at a color temperature of 2050°K was obtained for seven observers. Two conditions were used, (1) turning the light on and (2) turning the light both on and off before a judgment was made. The average threshold for the six observers in the 24–36 year age range was 2.35 log μμL.
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Absolute energy calibration of neutron thresholds

Nuclear Physics, 1966
Abstract A newly developed low background system for measuring neutron threshold energies above 5 MeV was used in conjunction with a 180° annular magnetic spectrometer to perform absolute measurements of four neutron threshold energies covering the energy range from 3 to 9.5 MeV.
G. Rickards, B.E. Bonner, G.C. Phillips, D.L. Bernard   +3 more
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Absolute threshold: analysis in terms of uncertainty

Journal of the Optical Society of America, 1981
Uncertainty, the inability to know or to make use of information regarding the parameters of a luminance stimulus to be detected, is herein shown by simulation to (1) steepen the frequency-of-seeing curve and (2) cause psychophysical estimates of quantum efficiency to be too low.
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Absolute Threshold Conditions for Visual Perception

Journal of the Optical Society of America, 1955
A quantitative approach to an understanding of fluctuating phenomena encountered near the threshold of vision has involved an analysis of frequency of seeing curves. The results of various investigators are discussed with reference to the possibility of an explanation based exclusively on the statistical fluctuations in the stimulating energy ...
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Performance-intensity functions at absolute and masked thresholds

The Journal of the Acoustical Society of America, 1993
In most applications of audibility and articulation theories, it is assumed that absolute thresholds and thermal noise maskers affect speech recognition performance-intensity (P-I) functions similarly. The purpose of this study was to evaluate that assumption.
Gerald A. Studebaker, Christine Gilmore, Robert L. Sherbecoe   +2 more
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