8 found
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  1.  19
    Wagering Demonstrates Subconscious Processing in a Binary Exclusion Task.Navindra Persaud & Peter McLeod - 2008 - Consciousness and Cognition 17 (3):565-575.
    We briefly presented either the letter ‘b’ or the letter ‘h’ to participants who were instructed to respond by saying the letter that was not shown. This binary version of the exclusion task avoids problems with assessing baseline completion rates. When the letters were shown for 5–10 ms participants erroneously responded with the shown letter at a rate greater than chance. They were capable of following the instructions when the letter was shown for longer . Given the chance to wager (...)
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  2.  41
    Direct Assessment of Qualia in a Blindsight Participant.Navindra Persaud & Hakwan Lau - 2008 - Consciousness and Cognition 17 (3):1046-1049.
    Experimenters generally infer whether participants have visual experiences based on metacognitive responses. We showed a well-studied blindsight participant, GY, several definitions of the term “qualia” and then questioned him about whether he felt or he experienced qualia in his normal and blind fields. We found, contrary to others who have used different methods for measuring qualia, that GY does not have qualia for stationary stimuli in his blind field. This novel method for directly assessing qualia embraces the idea that experiences (...)
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  3.  10
    External Validity: The Neglected Dimension in Evidence Ranking.Navindra Persaud & Muhammad M. Mamdani - 2006 - Journal of Evaluation in Clinical Practice 12 (4):450-453.
  4.  19
    Blindsight is Unlike Normal Conscious Vision: Evidence From an Exclusion Task.Navindra Persaud & Alan Cowey - 2008 - Consciousness and Cognition 17 (3):1050-1055.
    We explored whether information processed subconsciously in blindsight is qualitatively different from normal conscious processing. On each trial the blindsight patient GY was presented with a square-wave grating either in an upper or lower quadrant of his visual field and was asked to report the opposite of its location . We found that while GY was able to follow these exclusion instructions in his normal field, he tended to erroneously respond with the real location when the grating appeared in his (...)
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  5.  11
    Demonstrations of Subconscious Processing with the Binary Exclusion Task.Navindra Persaud & Peter McLeod - 2014 - Behavioral and Brain Sciences 37 (1):37-37.
  6.  16
    Commentary to Note by Seth: Experiments Show What Post-Decision Wagering Measures☆.Navindra Persaud, Peter McLeod & Alan Cowey - 2008 - Consciousness and Cognition 17 (3):984-985.
  7.  11
    How Can I Tell How I Think Till I See What I Say?Navindra Persaud - 2008 - Consciousness and Cognition 17 (4):1375-1375.
    Descriptive Experience Sampling is a clever method for determining the form of everyday thoughts. Results using this method show that people report that some of their thoughts are unsymbolic. Here I ask three questions: Does this merely show that people know what they are thinking about but not what they are thinking? Why do people have difficulty determining the form of their thoughts? How does the act of reporting the form of thoughts affect the recall of those thoughts?
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  8.  16
    Broken Telephone in the Brain: The Need for Metacognitive Measures.Hakwan Lau & Navindra Persaud - 2007 - Behavioral and Brain Sciences 30 (5-6):513-514.
    The fact that early visual processing has a larger capacity than later visual processing can be explained without positing distinct systems for phenomenology and cognitive accessibility. While phenomenology may overflow forced-choice reports, the later can also overestimate the former, as in the case of blindsight. Metacognitive measures of awareness offer a way to address the of consciousness research.
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