Semantic processing is a high level cognition function of the human brain. It has been argued intensively whether this process could be accomplished in the absence of awareness. Continuous flash suppression (CFS) is a powerful approach to create stable unconscious state. In this study, subjects were required to observe a series of paired Chinese words and judge the correlation between them in CFS paradigm. A negative component of event related potential, N400, and a Brain symmetry index were used to measure whether the meaning of the paired stimulus was registered in subliminal semantic processing. Analysis didn’t detect a significant difference in N400 response and EEG signal symmetry between correlated and uncorrelated pairs under unconscious condition. These results support the view that semantic information of Chinese character processing is absent without consciousness created by CFS.
References
[1]
Moradi, F., Koch, C. and Shimojo, S. (2005) Face Adaptation Depends on Seeing the Face. Neuron, 45, 169-175. https://doi.org/10.1016/j.neuron.2004.12.018
[2]
Heyman, T. and Moors, P. (2014) Frequent Words Do Not Break Continuous Flash Suppression Differently from Infrequent or Nonexistent Words: Implications for Semantic Processing of Words in the Absence of Awareness. PLoS ONE, 9, e104719. https://doi.org/10.1371/journal.pone.0104719
[3]
Karremans, J.C., Stroebe, W. and Claus, J. (2006) Beyond Vicary’s Fantasies: The Impact of Subliminal Priming and Brand Choice. Journal of Experimental Social Psychology, 42, 792-798. https://doi.org/10.1016/j.jesp.2005.12.002
[4]
Costello, P., Jiang, Y., Baartman, B., McGlennen, K. and He, S. (2009) Semantic and Subword Priming during Binocular Suppression. Consciousness and Cognition, 18, 375-382. https://doi.org/10.1016/j.concog.2009.02.003
[5]
Sklar, A.Y., Levy, N., Goldstein, A., Mandel, R., Maril, A. and Hassin, R.R. (2012) Reading and Doing Arithmetic Nonconsciously. Proceedings of the National Academy of Sciences of United States of America, 109, 19614-19619. https://doi.org/10.1073/pnas.1211645109
[6]
Blake, C.-Y. and Blake, R. (2005) Psychophysical Magic: Rendering the Visible “Invisible”. Trends in Cognitive Sciences, 9, 8. https://doi.org/10.1016/j.tics.2005.06.012
[7]
Lin, Z.C. and He, S. (2009) Seeing the Invisible: The Scope and Limits of Unconscious Processing in Binocular Rivalry. Progress in Neurobiology, 87, 17. https://doi.org/10.1016/j.pneurobio.2008.09.002
[8]
Lee, S.H., Blake, R. and Heeger, D.J. (2007) Hierarchy of Cortical Responses Underlying Binocular Rivalry. Nature Neuroscience, 10, 1048-1054. https://doi.org/10.1038/nn1939
[9]
Sterzer, P. and Rees, G. (2008) A Neural Basis for Percept Stabilization in Binocular Rivalry. Journal of Cognitive Neuroscience, 20, 389-399. https://doi.org/10.1162/jocn.2008.20039
[10]
Tsuchiya, N. and Koch, C. (2005) Continuous Flash Suppression Reduces Negative Afterimages. Nature Neuroscience, 8, 1096-1101. https://doi.org/10.1038/nn1500
[11]
Tsuchiya, N., Koch, C., Gilroy, L.A. and Blake, R. (2006) Depth of Interocular Suppression Associated with Continuous Flash Suppression, Flash Suppression, and Binocular Rivalry. Journal of Vision, 6, 1068-1078. https://doi.org/10.1167/6.10.6
[12]
Kutas, M. and Hillyard, S.A. (1980) Reading Senseless Sentences: Brain Potentials Reflect Semantic Incongruity. Science, 207, 203-205. https://doi.org/10.1126/science.7350657
[13]
Kutas, M. and Federmeier, K.D. (2011) Thirty Years and Counting: Finding Meaning in the N400 Component of the Event-Related Brain Potential (ERP). Annual Review of Psychology, 62, 621-647. https://doi.org/10.1146/annurev.psych.093008.131123
[14]
Lau, E.F., Phillips, C. and Poeppel, D. (2008) A Cortical Network for Semantics: (De)Constructing the N400. Nature Reviews Neuroscience, 9, 920-933. https://doi.org/10.1038/nrn2532
[15]
Kang, M.-S., Blake, R. and Woodman, G.F. (2011) Semantic Analysis Does Not Occur in the Absence of Awareness Induced by Interocular Suppression. The Journal of Neuroscience, 31, 11. https://doi.org/10.1523/JNEUROSCI.1691-11.2011
[16]
Yang, Y.H. and Yeh, S.L. (2011) Accessing the Meaning of Invisible Words. Consciousness and Cognition, 20, 223-233. https://doi.org/10.1016/j.concog.2010.07.005
[17]
Alex Polonsky, R.B., Braun, J. and Heeger, D.J. (2000) Neuronal Activity in Human Primary Visual Cortex Correlates with Perception during Binocular Rivalry. Nature Neuroscience, 3, 7. https://doi.org/10.1038/80676
[18]
van Putten, M.J. and Tavy, D.L. (2004) Continuous Quantitative EEG Monitoring in Hemispheric Stroke Patients Using the Brain Symmetry Index. Stroke, 35, 2489-2492. https://doi.org/10.1161/01.STR.0000144649.49861.1d
[19]
van Putten, M.J. (2007) The Revised Brain Symmetry Index. Clinical Neurophysiology, 118, 2362-2367. https://doi.org/10.1016/j.clinph.2007.07.019
[20]
Xin, X., Chang, J., Gao, Y. and Shi, Y. (2016) Correlation between the Revised Brain Symmetry Index, an EEG Feature Index, and Short-Term Prognosis in Acute Ischemic Stroke. Journal of Clinical Neurophysiology, 34, 162-167.
[21]
Kutas, M. (2000) Electrophysiology Reveals Semantic Memory Use in Language Comprehension. Trends in Cognitive Sciences, 4, 8. https://doi.org/10.1016/S1364-6613(00)01560-6
[22]
Kutas, M., Van Petten, C. and Besson, M. (1988) Event-Related Potential Asymmetries during the Reading of Sentences. Electroencephalography and Clinical Neurophysiology, 69, 218-233. https://doi.org/10.1016/0013-4694(88)90131-9
[23]
Metusalem, R., Kutas, M., Urbach, T.P. and Elman, J.L. (2016) Hemispheric Asymmetry in Event Knowledge Activation during Incremental Language Comprehension: A Visual Half-Field ERP Study. Neuropsychologia, 84, 252-271. https://doi.org/10.1016/j.neuropsychologia.2016.02.004
[24]
DeLong, K.A. and Kutas, M. (2016) Hemispheric Differences and Similarities in Comprehending More and Less Predictable Sentences. Neuropsychologia, 91, 380-393. https://doi.org/10.1016/j.neuropsychologia.2016.09.004
[25]
Axelrod, V., Bar, M., Rees, G. and Yovel, G. (2015) Neural Correlates of Subliminal Language Processing. Cerebral Cortex, 25, 2160-2169. https://doi.org/10.1093/cercor/bhu022
[26]
Hsiao, J.H., Shillcock, R. and Lee, C.Y. (2007) Neural Correlates of Foveal Splitting in Reading: Evidence from an ERP Study of Chinese Character Recognition. Neuropsychologia, 45, 1280-1292. https://doi.org/10.1016/j.neuropsychologia.2006.10.001
[27]
Maess, B., Mamashli, F., Obleser, J., Helle, L. and Friederici, A.D. (2016) Prediction Signatures in the Brain: Semantic Pre-Activation during Language Comprehension. Frontiers in Human Neuroscience, 10, 591. https://doi.org/10.3389/fnhum.2016.00591
[28]
Ci, H., van Graan, A., Gonzalvez, G., Thompson, P., Hill, A. and Duncan, J.S. (2016) Mandarin Functional MRI Language Paradigms. Brain and Behavior, 6, e00525. https://doi.org/10.1002/brb3.525
[29]
Zinszer, B.D., Anderson, A.J., Kang, O., Wheatley, T. and Raizada, R.D. (2016) Semantic Structural Alignment of Neural Representational Spaces Enables Translation between English and Chinese Words. Journal of Cognitive Neuroscience, 28, 1749-1759. https://doi.org/10.1162/jocn_a_01000
[30]
Schneider, J.M., Abel, A.D., Ogiela, D.A., Middleton, A.E. and Maguire, M.J. (2016) Developmental Differences in Beta and Theta Power during Sentence Processing. Developmental Cognitive Neuroscience, 19, 19-30. https://doi.org/10.1016/j.dcn.2016.01.001
[31]
Mellem, M.S., Friedman, R.B. and Medvedev, A.V. (2013) Gamma- and Theta-Band Synchronization during Semantic Priming Reflect Local and Long-Range Lexical-Semantic Networks. Brain and Language, 127, 440-451. https://doi.org/10.1016/j.bandl.2013.09.003
[32]
Wang, L. and Bastiaansen, M. (2014) Oscillatory Brain Dynamics Associated with the Automatic Processing of Emotion in Words. Brain and Language, 137, 120-129. https://doi.org/10.1016/j.bandl.2014.07.011
[33]
Metzner, P., von der Malsburg, T., Vasishth, S. and Rosler, F. (2015) Brain Responses to World Knowledge Violations: A Comparison of Stimulus- and Fixation-Triggered Event-Related Potentials and Neural Oscillations. Journal of Cognitive Neuroscience, 27, 1017-1028. https://doi.org/10.1162/jocn_a_00731
