Results 1 to 10 of about 3,367,707 (346)
The absolute threshold of colour vision in the horse. [PDF]
PLoS ONE, 2008 Arrhythmic mammals are active both during day and night if they are allowed. The arrhythmic horses are in possession of one of the largest terrestrial animal eyes and the purpose of this study is to reveal whether their eye is sensitive enough to see ...
Lina S V Roth +2 more
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The absolute threshold of cone vision. [PDF]
J Vis, 2011 We report measurements of the absolute threshold of cone vision, which has been previously underestimated due to suboptimal conditions or overly strict subjective response criteria. We avoided these limitations by using optimized stimuli and experimental
Koenig D, Hofer H.
europepmc +5 more sources
Modeling Luminance Perception at Absolute Threshold [PDF]
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.
Petr Kellnhofer +4 more
semanticscholar +4 more sources
The psychophysics of absolute threshold and signal duration: A probabilistic approach [PDF]
Journal of the Acoustical Society of America, 2011 The absolute threshold for a tone depends on its duration; longer tones have lower thresholds. This effect has traditionally been explained in terms of ?temporal integration? involving the summation of energy or perceptual information over time.
Heil P. +5 more
core +2 more sources
The dual rod system of amphibians supports colour discrimination at the absolute visual threshold [PDF]
Philosophical Transactions of the Royal Society B: Biological Sciences, 2017 The presence of two spectrally different kinds of rod photoreceptors in amphibians has been hypothesized to enable purely rod-based colour vision at very low light levels.
Carola A. M. Yovanovich +5 more
openalex +2 more sources
Hydrometeorological threshold conditions for debris flow initiation in Norway [PDF]
Natural Hazards and Earth System Sciences, 2012 Debris flows, triggered by extreme precipitation events and rapid snow melt, cause considerable damage to the Norwegian infrastructure every year. To define intensity-duration (ID) thresholds for debris flow initiation critical water supply conditions ...
N. K. Meyer +4 more
doaj +6 more sources
Setting the absolute threshold of vision. [PDF]
F1000 Biol Rep, 2009 The performance of sensory systems in many cases is limited by the physical nature of the stimulus. For vision, the quantal nature of light limits detection by dark-adapted observers; only now are we beginning to be aware of the subtleties in the biophysical mechanisms underlying this exquisite sensitivity.
Sampath AP, Fain GL.
europepmc +6 more sources
MAD saccade: statistically robust saccade threshold estimation via the median absolute deviation
Journal of Eye Movement Research, 2020 Saccade detection is a critical step in the analysis of gaze data. A common method for saccade detection is to use a simple threshold for velocity or acceleration values, which can be estimated from the data using the mean and standard deviation. However,
Benjamin Voloh +3 more
doaj +3 more sources
Development of absolute thresholds in chickens [PDF]
The Journal of the Acoustical Society of America, 1985 Absolute auditory thresholds were estimated in chickens at 0 and 4 days after hatching. Momentary suppressions of the chicks’ regular peeping, following the onset of a tone, were used as indications of stimulus detection. In the first experiment a staircase procedure was used to estimate thresholds. The absolute thresholds of both ages were the same at
Lincoln Gray, Edwin W. Rubel
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Factor Analysis of Absolute Auditory Thresholds [PDF]
The Journal of the Acoustical Society of America, 1960 Graphic recordings were obtained of the absolute thresholds to a series of twenty (20) pure tones, in equal-mel steps from 200 to 6000 cps, in steps of 1 db. Each tone was pulsed on a 0.50 duty cycle with a 500-msec duration for a period of 30 sec. The equipment was carefully calibrated to yield thresholds in db SPL.
John J. O'Hare
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