Visual persistence: effects of flash luminance, duration and energy.

Abstract Dark-adapted observers reported whether the offset of a test flash (30′ to the right of fixation) occurred before or after the onset of a probe flash (2°30′ to the left of fixation) as the interstimulus interval was varied. Visual persistence (the interstimulus interval at the point of subjeptive equality for test flash offset/probe flash onset) was found to decrease with either increases in flash duration or flash luminance. These effects were shown to be independent of differential visual latencies to the onsets of flashes. For equal-energy flashes (variable luminance and duration), persistence was constant up to 100 msec, and thereafter declined linearly with log flash duration, a result attributable to changes in the shape of the function relating persistence to flash duration at lower luminances. The systematic increase for equal-energy stimuli in the duration of the total visual response with increase in flash duration suggests a basis for the recent finding that at threshold equally-detectable stimuli of different durations are discriminable.

[1]  W. Levick,et al.  Responses of cat retinal ganglion cells to brief flashes of light , 1970, The Journal of physiology.

[2]  H. K. Hartline,et al.  THE RESPONSE OF SINGLE OPTIC NERVE FIBERS OF THE VERTEBRATE EYE TO ILLUMINATION OF THE RETINA , 1938 .

[3]  M. Alpern,et al.  Durations of the after-images of brief light flashes and the theory of the Broca and Sulzer phenomenon. , 1962, Journal of the Optical Society of America.

[4]  H PIERON,et al.  VISION IN INTERMITTENT LIGHT. LAWS AND MECHANISMS OF THE CRITICAL FREQUENCY FOR FUSION. , 1965, Contributions to sensory physiology.

[5]  L. Matin.  Eye Movements and Perceived Visual Direction , 1972 .

[6]  R. Haber,et al.  Direct estimates of the apparent duration of a flash. , 1970 .

[7]  R Efron,et al.  The relationship between the duration of a stimulus and the duration of a perception. , 1970, Neuropsychologia.

[8]  H. K. Hartline,et al.  Intensity and duration in the excitation of single photoreceptor units , 1934 .

[9]  V C Smith,et al.  Temporal and spatial interactions involved in the band movement phenomenon. , 1969, Vision research.

[10]  R Srebro,et al.  Spectral Sensitivity of Color Mechanisms: Derivation from Fluctuations of Color Appearance near Threshold , 1965, Science.

[11]  Robert M. Boynton,et al.  Discrimination of Homogeneous Double Pulses of Light , 1972 .

[12]  R Efron,et al.  The minimum duration of a perception. , 1970, Neuropsychologia.

[13]  J L Zacks,et al.  Temporal Summation Phenomena at Threshold: Their Relation to Visual Mechanisms , 1970, Science.

[14]  S. W. Kuffler.  Discharge patterns and functional organization of mammalian retina. , 1953, Journal of neurophysiology.

[15]  V C Smith,et al.  Scotopic and photopic functions for visual band movement. , 1969, Vision research.

[16]  C. H. Graham,et al.  BRIGHTNESS DISCRIMINATION AS A FUNCTION OF THE DURATION OF THE INCREMENT IN INTENSITY , 1938, The Journal of general physiology.

[17]  G. Sperling,et al.  Successive approximations to a model for short term memory. , 1967, Acta psychologica.