Perceptual load modulates conscious flicker perception
Perceptual load modulates conscious flicker perception
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DOI：
10.1167/7.14.14
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发表时间：
2007-01-01
影响因子：
1.8
通讯作者：
Lavie, Nilli
中科院分区：
文献类型：
--
作者：
Carmel, David;Saker, Pascal;Lavie, Nilli
主观视觉体验不仅取决于环境的空间安排，还取决于刺激的时间模式。例如，在同一位置呈现的闪烁光和稳定光由于其不同的时间模式而引起非常不同的感知体验。在这里，我们检查了处理资源的可用性是否影响有意识闪烁感知的时间分辨率——区分光强度快速变化、检测视觉时间模式的能力。参与者在搜索出现在外围的目标字母（单独（低感知负载）或与其他字母（高负载）一起搜索时）检测到固定 LED 中的闪烁，该 LED 在单独调整的临界闪烁融合 (CFF) 阈值或周围闪烁。在外围字母搜索的高负载（与低负载相比）下，物理上相同的闪烁刺激更有可能被感知为“融合”。此外，心理物理测量表明，在高感知负荷下闪烁检测灵敏度会降低。这些结果不可能是由于标准或刺激优先级差异或在不同负载条件下忘记正确响应的不同可能性造成的。这些发现表明，感知负荷影响对时间模式的有意识感知。
Subjective visual experience depends not only on the spatial arrangement of the environment, but also on the temporal pattern of stimulation. For example, flickering and steady light presented in the same location evoke a very different perceptual experience due to their different temporal patterns. Here, we examined whether the availability of processing resources affected the temporal resolution of conscious flicker perception-the ability to distinguish rapid changes in light intensity, detecting visual temporal patterns. Participants detected flicker in a fixated LED that flickered at or around the individually adjusted critical flicker fusion (CFF) threshold while searching for a target letter presented in the periphery either on its own ( low perceptual load) or among other letters ( high load). Physically identical flickering stimuli were more likely to be perceived as "fused" under high ( compared to low) load in the peripheral letter search. Furthermore, psychophysical measures showed a reduction in flicker detection sensitivity under high perceptual load. These results could not be due to criterion or stimulus prioritization differences or to differential likelihood of forgetting the correct response under different load conditions. These findings demonstrate that perceptual load influences conscious perception of temporal patterns.