scholarly journals A computational model of retinal circuitry predicts stimulus duration and intensity effects on visual persistence and afterimages

2013 ◽  
Vol 13 (9) ◽  
pp. 315-315
Author(s):  
J. Kim ◽  
G. Francis
Keyword(s):  
Computational Model ◽  
Stimulus Duration ◽  
Visual Persistence ◽  
Retinal Circuitry

Direct Measures of Short-Term Visual Storage

1969 ◽  
Vol 21 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Ralph Norman Haber ◽  
L. G. Standing
Keyword(s):  
Stimulus Duration ◽  
Visual Persistence ◽  
Recognition Threshold ◽  
Direct Measure ◽  
Fusion Model ◽  
Short Term ◽  
Visual Storage ◽  
The Subject ◽  
Direct Measures

Two experiments, involving seven conditions, explored the use of direct measures of visual persistence. In each, the subject was asked to judge if an intermittent stimulus appeared perceptually continuous, or whether it completely faded before the next presentation occurred. The first experiment showed that visual persistence was set at approximately 250 msec. for a recycling presentation of a circle in a tachistoscope; in another task employing a moving opaque slit passing back and forth over a circle, persistence times averaged 50 msec. longer. Reducing luminance by 2 log units increased persistence only slightly, though removing the adapting field increased it by over 100 msec. The second experiment, using the repeating circle, varied the duration of the stimulus, and compared monoptic with dichoptic presentations. Visual persistence was found to be independent of stimulus duration over a range of 4 to 200 msec., where all durations were above recognition threshold for the stimulus. Persistence was unaffected whether the stimulus was repeatedly presented in the same eye or alternated between eyes, strongly suggesting that the storage is central. Finally, a re-analysis of Dodwell and Engel's paper on stereopsis suggests that their effects can be adequately explained by visual persistence of the asynchronous stereo pairs, rather than a more complex fusion model. All of these results strongly support the use of visual persistence as a direct measure of short-term visual storage.

Visual Persistence as Measured by Reaction Time

1972 ◽  
Vol 24 (3) ◽  
pp. 318-325 ◽  
Author(s):  
Gary G. Briggs ◽  
Marcel Kinsbourne
Keyword(s):  
Reaction Time ◽  
Power Function ◽  
Stimulus Duration ◽  
Visual Display ◽  
Visual Persistence ◽  
The Other ◽  
Reaction Time Measure

Latency of reaction to onset of a visual display was subtracted from latency of reaction to offset. Persistence was defined as difference between the two latency values. Persistence was inversely related to stimulus duration and was comparable for monoptic presentation and for presentation of the first half of the stimulus duration to one eye and the second half to the other. A power function described the relation between persistence and stimulus duration. The possible effects of central intermittency on this type of reaction time measure are discussed.

Inference making and memory for text: A computational model

2001 ◽  
Author(s):  
Paul Van Den Broek ◽  
Yuhtsuen Tzeng ◽  
Sandy Virtue ◽  
Tracy Linderholm ◽  
Michael E. Young
Keyword(s):  
Computational Model ◽  
Inference Making ◽  
Memory For Text
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