Subliminal stimuli

sensory stimuli below an individual's threshold for conscious perception

Subliminal stimuli are sensations just "below the threshold" of a person's conscious perception.[1] They may be designed to influence the mental processes or the behavior of the individual without beiing noticed.

A recent review of functional magnetic resonance imaging (fMRI) studies shows that subliminal stimuli activate certain parts of the brain, but the subjects do not notice the stimulus.[2] Visual stimuli may be quickly flashed before an individual can process them, or flashed and then masked, thereby interrupting the processing. Audio stimuli may be played below audible volumes or masked by other stimuli.

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References

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  1. Loftus, Elizabeth F.& Klinger, Mark R. 1992. (1992). "Is the unconscious smart or dumb?". American Psychologist. 47 (6): 761–765. doi:10.1037/0003-066X.47.6.761. PMID 1616173.{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)
  2. Brooks S.J. et al 2012 (2012). "Exposure to subliminal arousing stimuli induces robust activation in the amygdala, hippocampus, anterior cingulate, insular cortex and primary visual cortex: a systematic meta-analysis of fMRI studies". NeuroImage. 59 (3): 2962–2973. doi:10.1016/j.neuroimage.2011.09.077. PMID 22001789. S2CID 14068396.{{cite journal}}: CS1 maint: numeric names: authors list (link)