12 found
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  1.  67
    Tracking the Processes Behind Conscious Perception: A Review of Event-Related Potential Correlates of Visual Consciousness. [REVIEW]Henry Railo, Mika Koivisto & Antti Revonsuo - 2011 - Consciousness and Cognition 20 (3):972-983.
    Event-related potential studies have attempted to discover the processes that underlie conscious visual perception by contrasting ERPs produced by stimuli that are consciously perceived with those that are not. Variability of the proposed ERP correlates of consciousness is considerable: the earliest proposed ERP correlate of consciousness coincides with sensory processes and the last one marks postperceptual processes. A negative difference wave called visual awareness negativity , typically observed around 200 ms after stimulus onset in occipitotemporal sites, gains strong support for (...)
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  2.  3
    Affective Processing Requires Awareness.Mikko Lähteenmäki, Jukka Hyönä, Mika Koivisto & Lauri Nummenmaa - 2015 - Journal of Experimental Psychology: General 144 (2):339-365.
  3.  22
    Independence of Visual Awareness From the Scope of Attention: An Electrophysiological Study.Mika Koivisto, Antti Revonsuo & Minna Lehtonen - 2006 - Cerebral Cortex 16 (3):415-424.
  4.  33
    An ERP Study of Change Detection, Change Blindness, and Visual Awareness.Mika Koivisto & Antti Revonsuo - 2003 - Psychophysiology 40 (3):423-429.
  5.  69
    Electrophysiological Correlates of Visual Consciousness and Selective Attention.Mika Koivisto & Antti Revonsuo - 2007 - Neuroreport 18 (8):753-756.
  6.  42
    The Electrophysiology of Introspection.Morten Overgaard, Mika Koivisto, Thomas Alrik Sorensen, Signe Vangkilde & Antti Revonsuo - 2006 - Consciousness and Cognition 15 (4):662-672.
    To study whether the distinction between introspective and non-introspective states of mind is an empirical reality or merely a conceptual distinction, we measured event-related potentials elicited in introspective and non-introspective instruction conditions while the observers were trying to detect the presence of a masked stimulus. The ERPs indicated measurable differences related to introspection in both preconscious and conscious processes. Our data support the hypothesis that introspective states empirically differ from non-introspective states.
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  7.  5
    The Electrophysiological Correlates of Stimulus Visibility and Metacontrast Masking.Henry Railo & Mika Koivisto - 2009 - Consciousness and Cognition 18 (3):794-803.
    There are conflicting views concerning the electrophysiological correlates of visual consciousness. Whereas one view considers a relatively late positive deflection as a primary correlate of consciousness, another model links consciousness with earlier negativity . The present experiment utilized metacontrast masking in investigating the electrophysiological correlates of visual consciousness. The participants were presented with target-mask sequences in three stimulus onset asynchronies. The target stimuli were followed by either a metacontrast mask or a similar-looking, but ineffective pseudomask. The results showed that the (...)
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  8.  15
    Transcranial Magnetic Stimulation of Early Visual Cortex Interferes with Subjective Visual Awareness and Objective Forced-Choice Performance.Mika Koivisto, Henry Railo & Niina Salminen-Vaparanta - 2011 - Consciousness and Cognition 20 (2):288-298.
    In order to study whether there exist a period of activity in the human early visual cortex that contributes exclusively to visual awareness, we applied transcranial magnetic stimulation over the early visual cortex and measured subjective visual awareness during visual forced-choice symbol or orientation discrimination tasks. TMS produced one dip in awareness 60–120 ms after stimulus onset, while forced-choice orientation discrimination was suppressed between 60 and 90 ms and symbol discrimination between 60 and 120 ms. Thus, a time window specific (...)
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  9.  16
    The Role of Attention in Subitizing.Henry Railo, Mika Koivisto, Antti Revonsuo & Minna M. Hannula - 2008 - Cognition 107 (1):82-104.
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  10.  3
    Relationship Between Visual Binding, Reentry and Awareness.Mika Koivisto & Juha Silvanto - 2011 - Consciousness and Cognition 20 (4):1293-1303.
    Visual feature binding has been suggested to depend on reentrant processing. We addressed the relationship between binding, reentry, and visual awareness by asking the participants to discriminate the color and orientation of a colored bar and to report their phenomenal awareness of the target features. The success of reentry was manipulated with object substitution masking and backward masking. The results showed that late reentrant processes are necessary for successful binding but not for phenomenal awareness of the bound features. Binding errors (...)
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  11.  11
    Unconscious Vision Spots the Animal but Not the Dog: Masked Priming of Natural Scenes.Mika Koivisto & Eveliina Rientamo - 2016 - Consciousness and Cognition 41:10-23.
  12.  5
    Reply to Bachmann on ERP Correlates of Visual Awareness☆.Henry Railo & Mika Koivisto - 2009 - Consciousness and Cognition 18 (3):809-810.