Unconscious Processing of Invisible Visual Stimuli

Overview

Journal Sci Rep

Specialty Science

Date 2016 Dec 13

PMID 27941851

Citations 6

Authors

Chen Song

Haishan Yao

Affiliations

Soon will be listed here.

Abstract

Unconscious processing of subliminal visual information, as illustrated by the above-chance accuracy in discriminating invisible visual stimuli, is evident in both blindsight patients and healthy human observers. However, the dependence of such unconscious processing on stimulus properties remains unclear. Here we studied the impact of stimulus luminance and stimulus complexity on the extent of unconscious processing. A testing stimulus presented to one eye was rendered invisible by a masking stimulus presented to the other eye, and healthy human participants made a forced-choice discrimination of the stimulus identity followed by a report of the perceptual awareness. Without awareness of the stimulus existence, participants could nevertheless reach above-chance accuracy in discriminating the stimulus identity. Importantly, the discrimination accuracy for invisible stimuli increased with the stimulus luminance and decreased with the stimulus complexity. These findings suggested that the input signal strength and the input signal complexity can affect the extent of unconscious processing without altering the subjective awareness.

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References

Kolb F, Braun J . Blindsight in normal observers. Nature. 1995; 377(6547):336-8. DOI: 10.1038/377336a0. View

Tsuchiya N, Koch C . Continuous flash suppression reduces negative afterimages. Nat Neurosci. 2005; 8(8):1096-101. DOI: 10.1038/nn1500. View

Hart W, Albarracin D . The effects of chronic achievement motivation and achievement primes on the activation of achievement and fun goals. J Pers Soc Psychol. 2009; 97(6):1129-41. PMC: 3626449. DOI: 10.1037/a0017146. View

Clifford C, Harris J . Contextual modulation outside of awareness. Curr Biol. 2005; 15(6):574-8. DOI: 10.1016/j.cub.2005.01.055. View

Mudrik L, Breska A, Lamy D, Deouell L . Integration without awareness: expanding the limits of unconscious processing. Psychol Sci. 2011; 22(6):764-70. DOI: 10.1177/0956797611408736. View

Fang F, He S . Cortical responses to invisible objects in the human dorsal and ventral pathways. Nat Neurosci. 2005; 8(10):1380-5. DOI: 10.1038/nn1537. View

De Gelder B, Vroomen J, Pourtois G, Weiskrantz L . Non-conscious recognition of affect in the absence of striate cortex. Neuroreport. 2000; 10(18):3759-63. DOI: 10.1097/00001756-199912160-00007. View

Grill-Spector K, Malach R . The human visual cortex. Annu Rev Neurosci. 2004; 27:649-77. DOI: 10.1146/annurev.neuro.27.070203.144220. View

Brainard D . The Psychophysics Toolbox. Spat Vis. 1997; 10(4):433-6. View

10.

Dehaene S, Naccache L, Le Clech G, Koechlin E, Mueller M, Dehaene-Lambertz G . Imaging unconscious semantic priming. Nature. 1998; 395(6702):597-600. DOI: 10.1038/26967. View

11.

van Gaal S, Ridderinkhof K, Fahrenfort J, Scholte H, Lamme V . Frontal cortex mediates unconsciously triggered inhibitory control. J Neurosci. 2008; 28(32):8053-62. PMC: 6670759. DOI: 10.1523/JNEUROSCI.1278-08.2008. View

12.

Dehaene S, Changeux J . Experimental and theoretical approaches to conscious processing. Neuron. 2011; 70(2):200-27. DOI: 10.1016/j.neuron.2011.03.018. View

13.

Jiang Y, He S . Cortical responses to invisible faces: dissociating subsystems for facial-information processing. Curr Biol. 2006; 16(20):2023-9. DOI: 10.1016/j.cub.2006.08.084. View

14.

Pessiglione M, Schmidt L, Draganski B, Kalisch R, Lau H, Dolan R . How the brain translates money into force: a neuroimaging study of subliminal motivation. Science. 2007; 316(5826):904-6. PMC: 2631941. DOI: 10.1126/science.1140459. View

15.

Boyer J, Harrison S, Ro T . Unconscious processing of orientation and color without primary visual cortex. Proc Natl Acad Sci U S A. 2005; 102(46):16875-9. PMC: 1283801. DOI: 10.1073/pnas.0505332102. View

16.

Overgaard M, Fehl K, Mouridsen K, Bergholt B, Cleeremans A . Seeing without Seeing? Degraded Conscious Vision in a Blindsight Patient. PLoS One. 2008; 3(8):e3028. PMC: 2507770. DOI: 10.1371/journal.pone.0003028. View

17.

Weiskrantz L, Barbur J, Sahraie A . Parameters affecting conscious versus unconscious visual discrimination with damage to the visual cortex (V1). Proc Natl Acad Sci U S A. 1995; 92(13):6122-6. PMC: 41654. DOI: 10.1073/pnas.92.13.6122. View

18.

Custers R, Aarts H . The unconscious will: how the pursuit of goals operates outside of conscious awareness. Science. 2010; 329(5987):47-50. DOI: 10.1126/science.1188595. View

19.

Sterzer P, Haynes J, Rees G . Fine-scale activity patterns in high-level visual areas encode the category of invisible objects. J Vis. 2009; 8(15):10.1-12. DOI: 10.1167/8.15.10. View

20.

Haynes J, Lotto R, Rees G . Responses of human visual cortex to uniform surfaces. Proc Natl Acad Sci U S A. 2004; 101(12):4286-91. PMC: 384733. DOI: 10.1073/pnas.0307948101. View