2 PULSES SEEN AS 3 FLASHES - A SUPERPOSITION ANALYSIS
2 PULSES SEEN AS 3 FLASHES - A SUPERPOSITION ANALYSIS
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DOI：
10.1016/0042-6989(89)90005-9
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发表时间：
1989-01-01
期刊：
影响因子：
1.8
通讯作者：
BOWEN, RW
中科院分区：
文献类型：
--
作者：
BOWEN, RW
If a single brief light pulse follows the offset of a light field by 0.1-0.3 sec, the pulse is seen as a double flash. This "double flash effect" is a suprathreshold phenomenon: the pulse must exceed detection threshold by 10 times or more for this temporal illusion to occur. A special case of this effect is demonstrated here: two brief, high-luminance pulses separated by 0.1 sec appear as three flashes. In a superposition analysis, hypothetical impulse response functions were added together with various delays to model flash perception. A biphasic impulse response (congruent with threshold flicker and pulse sensitivity) fails to predict perception of three flashes from two pulses. The analysis instead suggests that the visual response to a suprathreshold pulse has several alternating phases of excitation and inhibition.
