![]() Only when stimuli are so intense as to produce afterimages do these two effects fail to occur. Studies of visible persistence are reviewed seven different techniques that have been used for investigating visible persistence are identified, and it is pointed out that numerous studies using a variety of techniques have demonstrated two fundamental properties of visible persistence: the inverse duration effect (the longer a stimulus lasts, the shorter is its persistence after stimulus offset) and the inverse intensity effect (the more intense the stimulus, the briefer its persistence). It is argued here that this assumption is incorrect. These three forms of visual persistence are widely assumed to reflect a single underlying process: a decaying visual trace that (1) consists of afteractivity in the visual system, (2) is visible, and (3) is the source of visual information in experiments on decaying visual memory. Finally, information about visual properties of the stimulus may continue to be available to an observer for some time after stimulus offset (“informational persistence”). Second, the stimulus may continue to be visible for some time after its offset (“visible persistence”). First, neural activity in the visual system evoked by the stimulus may continue after stimulus offset (“neural persistence”). ![]() There are three senses in which a visual stimulus may be said to persist psychologically for some time after its physical offset. ![]()
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