Morten Overgaard Aalborg University
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  • Faculty, Aalborg University

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  1. M. Overgaard (forthcoming). Automaticity, Unconsciousness and Speech Production. Science and Consciousness Review.
     
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  2. Morten Overgaard (ed.) (2015). Behavioral Methods in Consciousness Research. Oup Oxford.
    '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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  3. Kristian Sandberg, Bo Martin Bibby & Morten Overgaard (2013). Measuring and Testing Awareness of Emotional Face Expressions. 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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  4. Mikkel C. Vinding, Michael N. Pedersen & Morten Overgaard (2013). Unravelling Intention: Distal Intentions Increase the Subjective Sense of Agency. 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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  5. Morten Overgaard & Thor Grünbaum (2012). Cognitive and Non-Cognitive Conceptions of Consciousness. Trends in Cognitive Sciences 16 (3):137.
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  6. Morten Overgaard & Mads Jensen (eds.) (2012). Consciousness and Neural Plasticity. Frontiers Books.
  7. Morten Overgaard (2011). Visual Experience and Blindsight: A Methodological Review. 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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  8. Morten Overgaard & Thor Grünbaum (2011). Consciousness and Modality: On the Possible Preserved Visual Consciousness in Blindsight Subjects. 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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  9. Kristian Sandberg, Bo Martin Bibby, Bert Timmermans, Axel Cleeremans & Morten Overgaard (2011). Measuring Consciousness: Task Accuracy and Awareness as Sigmoid Functions of Stimulus Duration. 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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  10. Morten Overgaard, Bert Timmermans, Kristian Sandberg & Axel Cleeremans (2010). Optimizing Subjective Measures of Consciousness. 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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  11. Kristian Sandberg, Bert Timmermans, Morten Overgaard & Axel Cleeremans (2010). Measuring Consciousness: Is One Measure Better Than the Other? 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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  12. Bert Timmermans, Kristian Sandberg, Axel Cleeremans & Morten Overgaard (2010). Partial Awareness Distinguishes Between Measuring Conscious Perception and Conscious Content: Reply to Dienes and Seth. 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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  13. Anil K. Seth, Zoltan Dienes, Axel Cleeremans, Morten Overgaard & Luiz Pessoa (2008). Measuring Consciousness: Relating Behavioural and Neurophysiological Approaches. Trends in Cognitive Sciences 12 (8):314-321.
  14. Morten Overgaard (2006). Consciousness Studies: The View From Psychology. [REVIEW] British Journal of Psychology 97 (3):425-438.
  15. Morten Overgaard (2006). Introspection in Science. Consciousness and Cognition 15 (4):629-633.
  16. Morten Overgaard, Mika Koivisto, Thomas Alrik Sorensen, Signe Vangkilde & Antti Revonsuo (2006). The Electrophysiology of Introspection. 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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  17. Morten Overgaard, Julian Rote, Kim Mouridsen & Thomas Zoega Ramsoy (2006). Is Conscious Perception Gradual or Dichotomous? A Comparison of Report Methodologies During a Visual Task. 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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  18. Shaun Gallagher & Morten Overgaard (2005). Introspections Without Introspeculations. In Murat Aydede (ed.), Pain: New Essays on its Nature and the Methodology of its Study. Cambridge Ma: Bradford Book/Mit Press.
  19. Morten Overgaard (2004). Confounding Factors in Contrastive Analysis. 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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  20. Morten Overgaard (2004). On the Naturalizing of Phenomenology. 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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  21. Morten Overgaard (2004). Special Issue on the Return of Subjectivity Edited by Dan Zahavi. Phenomenology and the Cognitive Sciences 3:399-400.
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  22. Morten Overgaard, Jorgen Feldbaek Nielsen & Anders Fuglsang-Frederiksen (2004). A TMS Study of the Ventral Projections From V1 with Implications for the Finding of Neural Correlates of Consciousness. Brain and Cognition 54 (1):58-64.
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  23. Morten Overgaard & T. A. Sorenson (2004). Introspection Distinct From First-Order Experiences. 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. Thomas Zoega Ramsøy & Morten Overgaard (2004). Introspection and Subliminal Perception. 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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  25. Morten Overgaard (2003). Voluntary Action. Science and Consciousness Review 8:1-2.
     
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  26. Morten Overgaard & Soeren Willert (2003). On the Encompassing of the Behaviour of Man. Behavioral and Brain Sciences 26 (5):615-616.
    One supposition underlying the Anderson & Lebiere (A&L) target article is that the maximally broad “encompassing of its subject matter – the behavior of man” (cf. sect. 6, last para.) 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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  27. M. Overgaard, O. Kauffmann & T. Z. Ramsøy (2001). Consciousness and Introspection, Toward a Science of Consciousness: Consciousness Research Abstracts. Journal of Consciousness Studies 182.
     
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  28. M. Overgaard, O. Kauffmann & T. Z. Ramsøy (2001). Consciousness and Introspection. Journal of Consciousness Studies: Consciousness Research Abstract 182.
     
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  29. Morten Overgaard (2001). The Role of Phenomenological Reports in Experiments on Consciousness. Psycoloquy 12 (29):1-10.
  30. Morten Overgaard, Problems in the "Functional" Investigations of Consciousness.
    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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