Response latencies to the onset and offset of visual stimuli

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Abstract

Simple resoonse times (RTs) are known to be slower to the offset of a visual stimulus than to its onset. This is called the onset advantage. In the first of four experiments, we discovered that a spurious onset advantage can be produced by the long persistence of P31 phosphor. In the remaining three experiments, we found that offset RTs were slower only when they were made in a context in which responses to the abrupt onset of some stimuli had to be suppressed. We tested this hypothesis of response suppression in two ways: (1) by mixing regular onset trials with other trials on which a response to an onset had to be suppressed, and (2) by ramping the emergence of "offset" stimuli over time, so that offsets were the only abrupt events in the display. In both cases, we found that the onset advantage depended critically on whether the responses were made in a context of response suppression. We conclude that the onset advantage is mediated not by sensory factors such as visible persistence, but by response programming factors that are strongly affected by contextual events.

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Di Lollo, V., Enns, J. T., Yantis, S., & Dechief, L. G. (2000). Response latencies to the onset and offset of visual stimuli. Perception and Psychophysics, 62(1), 218–225. https://doi.org/10.3758/BF03212073

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