期刊
COGNITION
卷 212, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cognition.2021.104719
关键词
Mental imagery; Perception; Reality monitoring; Signal detection theory
资金
- Rubicon grant from the Netherlands Organization for Scientific Research (NWO) [019.192SG.003]
- Graduate Research Scholarship from UCL
- Overseas Research Scholarship from UCL
- Sir Henry Dale Fellowship - Wellcome Trust [218535/Z/19/Z]
- Sir Henry Dale Fellowship - Royal Society [218535/Z/19/Z]
- Wellcome/Royal Society Sir Henry Dale Fellowship [206648/Z/17/Z]
- Philip Leverhulme Prize from the Leverhulme Trust
- Wellcome Trust [206648/Z/17/Z]
- Wellcome Trust [218535/Z/19/Z] Funding Source: Wellcome Trust
The study found that imagery influences perception, leading to a more liberal criterion for reporting stimulus presence. Participants with more vivid imagery were generally more likely to report the presence of external stimuli. This suggests that internally generated sensory signals during imagery can sometimes be confused for perception, impacting conscious perception.
Visual experiences can be triggered externally, by signals coming from the outside world during perception; or internally, by signals from memory during mental imagery. Imagery and perception activate similar neural codes in sensory areas, suggesting that they might sometimes be confused. In the current study, we investigated whether imagery influences perception by instructing participants to imagine gratings while externally detecting these same gratings at threshold. In a series of three experiments, we showed that imagery led to a more liberal criterion for reporting stimulus presence, and that this effect was both independent of expectation and stimulusspecific. Furthermore, participants with more vivid imagery were generally more likely to report the presence of external stimuli, independent of condition. The results can be explained as either a low-level sensory or a highlevel decision-making effect. We discuss that the most likely explanation is that during imagery, internally generated sensory signals are sometimes confused for perception and suggest how the underlying mechanisms can be further characterized in future research. Our findings show that imagery and perception interact and emphasize that internally and externally generated signals are combined in complex ways to determine conscious perception.
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