Electrophysiological correlates of visual consciousness and selective attention

It is not clear whether attention is necessary or not for consciousness. We studied the relationship between attention and consciousness by tracking their electrophysiological correlates. The participants attended to visual targets, ignored nontargets in the prespecified visual field and ignored all stimuli in the opposite field. Visual consciousness was varied by masking. Our results showed that the earliest electrophysiological correlate of consciousness emerged independent of the manipulations of spatial and nonspatial attention. Conversely, the electrophysiological correlate of attention, selection negativity, was elicited regardless of the presence or absence of consciousness. Only the correlates of later, higher-level conscious processes strongly depended on attention. Thus, the electrophysiological brain responses reflecting visual consciousness and attention are initially independent of each other.

[1]  Geraint Rees,et al.  What can functional imaging reveal about the role of attention in visual awareness? , 2001, Neuropsychologia.

[2]  Antti Revonsuo,et al.  Preconscious analysis of global structure: Evidence from masked priming , 2004 .

[3]  I. Rock,et al.  Inattentional blindness: Perception without attention. , 1998 .

[4]  Minna Lehtonen,et al.  Independence of visual awareness from the scope of attention: an electrophysiological study. , 2006, Cerebral cortex.

[5]  C Kaernbach,et al.  Effects of consciousness on human brain waves following binocular rivalry. , 1999, Neuroreport.

[6]  K. Shapiro,et al.  The attentional blink , 1997, Trends in Cognitive Sciences.

[7]  N. Block.  Paradox and cross purposes in recent work on consciousness , 2001, Cognition.

[8]  A. Revonsuo.  Inner Presence: Consciousness as a Biological Phenomenon , 2005 .

[9]  Lamme Vaf,et al.  Why visual attention and awareness are different , 2003 .

[10]  M. Koivisto,et al.  An ERP study of change detection, change blindness, and visual awareness. , 2003, Psychophysiology.

[11]  D. Simons,et al.  CHAPTER 13 – Change Blindness , 2005 .

[12]  M. Koivisto,et al.  Independence of visual awareness from attention at early processing stages , 2005, Neuroreport.

[13]  C. Frith,et al.  Inattentional blindness versus inattentional amnesia for fixated but ignored words. , 1999, Science.

[14]  J. Wolfe.  Inattentional Amnesia , 2000 .

[15]  S. Hillyard,et al.  Event-related brain potentials in the study of visual selective attention. , 1998, Proceedings of the National Academy of Sciences of the United States of America.

[16]  A. Proverbio,et al.  Visual Selective Attention to Object Features , 2003 .

[17]  N. Block.  On a confusion about a function of consciousness , 1995, Behavioral and Brain Sciences.

[18]  G. Woodman,et al.  Dissociations Among Attention, Perception, and Awareness During Object-Substitution Masking , 2003, Psychological science.

[19]  Rolf Verleger,et al.  Traces Left on Visual Selective Attention by Stimuli That Are Not Consciously Identified , 2002, Psychological science.

[20]  S. Luck,et al.  On the role of selective attention in visual perception. , 1998, Proceedings of the National Academy of Sciences of the United States of America.

[21]  Antti Revonsuo,et al.  An electrophysiological correlate of human visual awareness , 2004, Neuroscience Letters.