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Profile: Morten Overgaard (Aalborg University)
  1.  30
    Measuring Consciousness: Is One Measure Better Than the Other?Kristian Sandberg, Bert Timmermans, Morten Overgaard & Axel Cleeremans - 2010 - Consciousness and Cognition 19 (4):1069-1078.
    What is the best way of assessing the extent to which people are aware of a stimulus? Here, using a masked visual identification task, we compared three measures of subjective awareness: The Perceptual Awareness Scale , through which participants are asked to rate the clarity of their visual experience; confidence ratings , through which participants express their confidence in their identification decisions, and Post-decision wagering , in which participants place a monetary wager on their decisions. We conducted detailed explorations of (...)
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  2. Measuring Consciousness: Relating Behavioural and Neurophysiological Approaches.Anil K. Seth, Zoltan Dienes, Axel Cleeremans, Morten Overgaard & Luiz Pessoa - 2008 - Trends in Cognitive Sciences 12 (8):314-321.
  3.  83
    Introspection and Subliminal Perception.Thomas Zoega Ramsøy & Morten Overgaard - 2004 - Phenomenology and the Cognitive Sciences 3 (1):1-23.
    Subliminal perception (SP) is today considered a well-supported theory stating that perception can occur without conscious awareness and have a significant impact on later behaviour and thought. In this article, we first present and discuss different approaches to the study of SP. In doing this, we claim that most approaches are based on a dichotomic measure of awareness. Drawing upon recent advances and discussions in the study of introspection and phenomenological psychology, we argue for both the possibility and necessity of (...)
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  4.  39
    Is Conscious Perception Gradual or Dichotomous? A Comparison of Report Methodologies During a Visual Task.Morten Overgaard, Julian Rote, Kim Mouridsen & Thomas Zoega Ramsoy - 2006 - Consciousness and Cognition 15 (4):700-708.
    In a recent article, [Sergent, C. & Dehaene, S. . Is consciousness a gradual phenomenon? Evidence for an all-or-none bifurcation during the attentional blink, Psychological Science, 15, 720–729] claim to give experimental support to the thesis that there is a clear transition between conscious and unconscious perception. This idea is opposed to theoretical arguments that we should think of conscious perception as a continuum of clarity, with e.g., fringe conscious states [Mangan, B. . Sensation’s ghost—the non-sensory “fringe” of consciousness, Psyche, (...)
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  5. Visual Experience and Blindsight: A Methodological Review.Morten Overgaard - 2011 - Experimental Brain Research 209:473-479.
    Blindsight is classically defined as residual visual capacity, e.g., to detect and identify visual stimuli, in the total absence of perceptual awareness following lesions to V1. However, whereas most experiments have investigated what blindsight patients can and cannot do, the literature contains several, often contradictory, remarks about remaining visual experience. This review examines closer these remarks as well as experiments that directly approach the nature of possibly spared visual experiences in blindsight.
     
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  6.  14
    Measuring Consciousness: Task Accuracy and Awareness as Sigmoid Functions of Stimulus Duration.Kristian Sandberg, Bo Martin Bibby, Bert Timmermans, Axel Cleeremans & Morten Overgaard - 2011 - Consciousness and Cognition 20 (4):1659-1675.
    When consciousness is examined using subjective ratings, the extent to which processing is conscious or unconscious is often estimated by calculating task performance at the subjective threshold or by calculating the correlation between accuracy and awareness. However, both these methods have certain limitations. In the present article, we propose describing task accuracy and awareness as functions of stimulus intensity as suggested by Koch and Preuschoff . The estimated lag between the curves describes how much stimulus intensity must increase for awareness (...)
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  7.  25
    Consciousness and Modality: On the Possible Preserved Visual Consciousness in Blindsight Subjects.Morten Overgaard & Thor Grünbaum - 2011 - Consciousness and Cognition 20 (4):1855-1859.
    In a recent paper, Brogaard presents counter-arguments to the conclusions of an experiment with blindsight subject GR. She argues that contrary to the apparent findings that GR’s preserved visual abilities relate to degraded visual experiences, she is in fact fully unconscious of the stimuli she correctly identifies. In this paper, we present arguments and evidence why Brogaard’s argument does not succeed in its purpose. We suggest that not only is relevant empirical evidence in opposition to Brogaard’s argument, her argument misconstrues (...)
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  8.  7
    Measuring and Testing Awareness of Emotional Face Expressions.Kristian Sandberg, Bo Martin Bibby & Morten Overgaard - 2013 - Consciousness and Cognition 22 (3):806-809.
    Comparison of behavioural measures of consciousness has attracted much attention recently. In a recent article, Szczepanowski et al. conclude that confidence ratings predict accuracy better than both the perceptual awareness scale and post-decision wagering when using stimuli with emotional content . Although we find the study interesting, we disagree with the conclusion that CR is superior to PAS because of two methodological issues. First, the conclusion is not based on a formal test. We performed this test and found no evidence (...)
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  9.  5
    Reconciling Current Approaches to Blindsight.Morten Overgaard & Jesper Mogensen - 2015 - Consciousness and Cognition 32:33-40.
  10.  32
    Can No-Report Paradigms Extract True Correlates of Consciousness?Morten Overgaard & Peter Fazekas - 2016 - Trends in Cognitive Sciences 20 (4):241-242.
  11.  57
    Optimizing Subjective Measures of Consciousness.Morten Overgaard, Bert Timmermans, Kristian Sandberg & Axel Cleeremans - 2010 - Consciousness and Cognition 19 (2):682-684.
    Dienes and Seth (2010) conclude that confidence ratings and post-decision wagering are two comparable and recommendable measures of conscious experience. In a recently submitted paper, we have however found that both methods are problematic and seem less suited to measure consciousness than a direct introspective measure. Here, we discuss the methodology and conclusions put forward by Dienes and Seth, and why we think the two experiments end up with so different recommendations.
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  12.  16
    Unravelling Intention: Distal Intentions Increase the Subjective Sense of Agency.Mikkel C. Vinding, Michael N. Pedersen & Morten Overgaard - 2013 - Consciousness and Cognition 22 (3):810-815.
    Experimental studies investigating the contribution of conscious intention to the generation of a sense of agency for one’s own actions tend to rely upon a narrow definition of intention. Often it is operationalized as the conscious sensation of wanting to move right before movement. Existing results and discussion are therefore missing crucial aspects of intentions, namely intention as the conscious sensation of wanting to move in advance of the movement. In the present experiment we used an intentional binding paradigm, in (...)
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  13.  69
    Introspection in Science.Morten Overgaard - 2006 - Consciousness and Cognition 15 (4):629-633.
  14.  1
    Evidence of Weak Conscious Experiences in the Exclusion Task.Kristian Sandberg, Simon H. Del Pin, Bo M. Bibby & Morten Overgaard - 2014 - Frontiers in Psychology 5.
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  15.  26
    Partial Awareness Distinguishes Between Measuring Conscious Perception and Conscious Content: Reply to Dienes and Seth.Bert Timmermans, Kristian Sandberg, Axel Cleeremans & Morten Overgaard - 2010 - Consciousness and Cognition 19 (4):1081-1083.
    In their comment on Sandberg, Timmermans, Overgaard, and Cleeremans , Dienes and Seth argue that increased sensitivity of the Perceptual Awareness Scale is a consequence of the scale being less exclusive rather than more exhaustive. According to Dienes and Seth, this is because PAS may measure some conscious content, though not necessarily relevant conscious content, “If one saw a square but was only aware of seeing a flash of something, then one has not consciously seen a square.” In this reply, (...)
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  16.  19
    An Integrative View on Consciousness and Introspection.Morten Overgaard & Jesper Mogensen - 2017 - Review of Philosophy and Psychology 8 (1):129-141.
    The relation between first and higher order mental states is currently unknown. In particular, the relation between conscious experience and introspection is difficult as the same methods are used to investigate them. In order to make progress in the scientific understanding of consciousness, introspection or both, it is fundamental to understand whether their relation is serial or reciprocal. Although the amount of empirical evidence directly addressing this question is sparse, the little that exists suggests a more complex situation that must (...)
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  17.  87
    On the Naturalizing of Phenomenology.Morten Overgaard - 2004 - Phenomenology and the Cognitive Sciences 3 (4):365-79.
    In the attempt to construct a scientific approach to consciousness, it has been proposed that transcendental phenomenology or phenomenological psychology be introduced into the framework of cognitive neuroscience. In this article, the consequences of such an approach in terms of basic assumptions, methods for the collection of data, and evaluation of the collected data are discussed. Especially, the proposed notions of mutual constraint and the second perso are discussed. It is concluded that even though naturalising of phenomenology might not prove (...)
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  18. Is Conscious Stimulus Identification Dependent on Knowledge of the Perceptual Modality? Testing the “Source Misidentification Hypothesis”.Morten Overgaard, Jonas Lindeløv, Stinna Svejstrup, Marianne Døssing, Tanja Hvid, Oliver Kauffmann & Kim Mouridsen - 2013 - Frontiers in Psychology 4.
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  19.  25
    Cognitive and Non-Cognitive Conceptions of Consciousness.Morten Overgaard & Thor Grünbaum - 2012 - Trends in Cognitive Sciences 16 (3):137.
  20.  69
    Confounding Factors in Contrastive Analysis.Morten Overgaard - 2004 - Synthese 141 (2):217-31.
    Several authors within psychology, neuroscience and philosophy take for granted that standard empirical research techniques are applicable when studying consciousness. In this article, it is discussed whether one of the key methods in cognitive neuroscience – the contrastive analysis – suffers from any serious confounding when applied to the field of consciousness studies; that is to say, if there are any systematic difficulties when studying consciousness with this method that make the results untrustworthy. Through an analysis of theoretical arguments in (...)
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  21.  40
    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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  22.  26
    A TMS Study of the Ventral Projections From V1 with Implications for the Finding of Neural Correlates of Consciousness.Morten Overgaard, Jorgen Feldbaek Nielsen & Anders Fuglsang-Frederiksen - 2004 - Brain and Cognition 54 (1):58-64.
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  23.  26
    Introspection Distinct From First-Order Experiences.Morten Overgaard & T. A. Sorenson - 2004 - Journal of Consciousness Studies 11 (7-8):11--7.
    As is the case with other concepts about mental affairs, the concept of introspection has many different interpretations. Some seem to consider introspecting a perceptive act and others see it as a thinking activity . For the present purpose, we will claim it as a common understanding in all such theories that introspection presupposes consciousness . States of consciousness, broadly discussed in the philosophical and empirical literature as first order states of consciousness, are states in which a subject is aware (...)
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  24. Introspections Without Introspeculations.Shaun Gallagher & Morten Overgaard - 2005 - In Murat Aydede (ed.), Pain: New Essays on its Nature and the Methodology of its Study. Cambridge Ma: Bradford Book/Mit Press.
     
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  25.  6
    Deaf Hearing: Implicit Discrimination of Auditory Content in a Patient with Mixed Hearing Loss.Berit Brogaard, Kristian Marlow, Morten Overgaard, Bennett L. Schwartz, Cengiz Zopluoglu, Steffie Tomson, Janina Neufed, Christopher Sinke, Christopher Owen & David Eagleman - 2017 - Philosophical Psychology 30 (1-2):21-43.
    We describe a patient LS, profoundly deaf in both ears from birth, with underdeveloped superior temporal gyri. Without hearing aids, LS displays no ability to detect sounds below a fixed threshold of 60 dBs, which classifies him as clinically deaf. Under these no-hearing-aid conditions, when presented with a forced-choice paradigm in which he is asked to consciously respond, he is unable to make above-chance judgments about the presence or location of sounds. However, he is able to make above-chance judgments about (...)
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  26.  4
    A Multi‐Factor Account of Degrees of Awareness.Peter Fazekas & Morten Overgaard - forthcoming - Cognitive Science.
    In this paper we argue that awareness comes in degrees, and we propose a novel multi-factor account that spans both subjective experiences and perceptual representations. At the subjective level, we argue that conscious experiences can be degraded by being fragmented, less salient, too generic, or flash-like. At the representational level, we identify corresponding features of perceptual representations—their availability for working memory, intensity, precision, and stability—and argue that the mechanisms that affect these features are what ultimately modulate the degree of awareness. (...)
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  27.  33
    The Role of Phenomenological Reports in Experiments on Consciousness.Morten Overgaard - 2001 - Psycoloquy 12 (29):1-10.
  28.  1
    The Status and Future of Consciousness Research.Morten Overgaard - 2017 - Frontiers in Psychology 8.
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  29.  24
    Special Issue on the Return of Subjectivity Edited by Dan Zahavi.Morten Overgaard - 2004 - Phenomenology and the Cognitive Sciences 3:399-400.
  30. Consciousness Studies: The View From Psychology. [REVIEW]Morten Overgaard - 2006 - British Journal of Psychology 97 (3):425-438.
  31.  4
    The Development of a Sense of Control Scale.Mia Y. Dong, Kristian Sandberg, Bo M. Bibby, Michael N. Pedersen & Morten Overgaard - 2015 - Frontiers in Psychology 6.
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  32.  15
    Problems in the "Functional" Investigations of Consciousness.Morten Overgaard - manuscript
    This article presents the view that the “problem of consciousness” – per definition – can not be seen as a strictly scientific or strictly philosophical problem. The first idea, especially, leads to important difficulties: First of all, the idea has in most cases implied some rather superficial reductionistic or functionalistic a priori assumptions, and, secondly, it can be shown that some of the most commonly used empirical methods in these regards are inadequate. Especially so in the case of contrastive analysis, (...)
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  33.  5
    On the Encompassing of the Behaviour of Man.Morten Overgaard & Soeren Willert - 2003 - Behavioral and Brain Sciences 26 (5):615-616.
    One supposition underlying the Anderson & Lebiere target article is that the maximally broad “encompassing of its subject matter – the behavior of man” is regarded as an unquestioned quality criterion for guiding cognitive research. One might argue for an explicit specification of the limitations of a given paradigm, rather than extending it to apply to as many domains as possible.
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  34.  1
    The Time Between Intention and Action Affects the Experience of Action.Mikkel C. Vinding, Mads Jensen & Morten Overgaard - 2015 - Frontiers in Human Neuroscience 9.
  35. Early Visual Processing Allows for Selective Behavior, Shifts of Attention, and Conscious Visual Experience in Spite of Masking.Sébastien M. Crouzet, Lyudmyla Y. Kovalenko, Simon Hviid del Pin, Morten Overgaard & Niko A. Busch - 2017 - Consciousness and Cognition 54:89-100.
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  36. Early Visual Processing Allows for Selective Behavior, Shifts of Attention, and Conscious Visual Experience in Spite of Masking.Sébastien M. Crouzet, Lyudmyla Y. Kovalenko, Simon Hviid del Pin, Morten Overgaard & Niko A. Busch - 2017 - Consciousness and Cognition 54:89-100.
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  37. Behavioral Methods in Consciousness Research.Morten Overgaard (ed.) - 2015 - Oxford University Press.
    'Behavioral Methods in Consciousness Research' is the first book of its kind, providing an overview of methods and approaches for studying consciousness. The chapters are written by leading researchers and experts who describe the methods they actually use in their own studies, along with their pitfalls, problems, and difficulties.
     
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  38.  79
    Consciousness and Neural Plasticity.Morten Overgaard & Mads Jensen (eds.) - 2012 - Frontiers Books.
  39. Voluntary Action.Morten Overgaard - 2003 - Science and Consciousness Review 8:1-2.