16 found
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Jorge Morales [15]Jorge Iván Hoyos Morales [2]Jorge A. Morales [1]
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Jorge Morales
Johns Hopkins University
Jorge Morales
University of Costa Rica
  1. The Neural Correlates of Consciousness.Jorge Morales & Hakwan Lau - 2020 - In Uriah Kriegel (ed.), The Oxford Handbook of the Philosophy of Consciousness. Oxford University Press. pp. 233-260.
    In this chapter, we discuss a selection of current views of the neural correlates of consciousness (NCC). We focus on the different predictions they make, in particular with respect to the role of prefrontal cortex (PFC) during visual experiences, which is an area of critical interest and some source of contention. Our discussion of these views focuses on the level of functional anatomy, rather than at the neuronal circuitry level. We take this approach because we currently understand more about experimental (...)
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  2. Minority Reports: Consciousness and the Prefrontal Cortex.Matthias Michel & Jorge Morales - 2020 - Mind and Language 35 (4):493-513.
    Whether the prefrontal cortex is part of the neural substrates of consciousness is currently debated. Against prefrontal theories of consciousness, many have argued that neural activity in the prefrontal cortex does not correlate with consciousness but with subjective reports. We defend prefrontal theories of consciousness against this argument. We surmise that the requirement for reports is not a satisfying explanation of the difference in neural activity between conscious and unconscious trials, and that prefrontal theories of consciousness come out of this (...)
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  3. Confidence Tracks Consciousness.Jorge Morales & Hakwan Lau - forthcoming - In Joshua Weisberg (ed.), Qualitative Consciousness: Themes from the Philosophy of David Rosenthal.
    Consciousness and confidence seem intimately related. Accordingly, some researchers use confidence ratings as a measure of, or proxy for, consciousness. Rosenthal discusses the potential connections between the two, and rejects confidence as a valid measure of consciousness. He argues that there are better alternatives to get at conscious experiences such as direct subjective reports of awareness (i.e. subjects’ reports of perceiving something or of the degree of visibility of a stimulus). In this chapter, we offer a different perspective. Confidence ratings (...)
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  4. The Fundamental Problem with No-Cognition Paradigms.Ian B. Phillips & Jorge Morales - 2020 - Trends in Cognitive Sciences:1-2.
  5. Sustained Representation of Perspectival Shape.Jorge Morales, Axel Bax & Chaz Firestone - 2020 - Proceedings of the National Academy of Sciences of the United States of America 117 (26):14873–14882.
    Arguably the most foundational principle in perception research is that our experience of the world goes beyond the retinal image; we perceive the distal environment itself, not the proximal stimulation it causes. Shape may be the paradigm case of such “unconscious inference”: When a coin is rotated in depth, we infer the circular object it truly is, discarding the perspectival ellipse projected on our eyes. But is this really the fate of such perspectival shapes? Or does a tilted coin retain (...)
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  6.  48
    Domain-General and Domain-Specific Patterns of Activity Support Metacognition in Human Prefrontal Cortex.Jorge Morales, Hakwan Lau & Stephen M. Fleming - 2018 - The Journal of Neuroscience 38 (14):3534-3546.
    Metacognition is the capacity to evaluate the success of one's own cognitive processes in various domains; for example, memory and perception. It remains controversial whether metacognition relies on a domain-general resource that is applied to different tasks or if self-evaluative processes are domain specific. Here, we investigated this issue directly by examining the neural substrates engaged when metacognitive judgments were made by human participants of both sexes during perceptual and memory tasks matched for stimulus and performance characteristics. By comparing patterns (...)
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  7. Controlling for Performance Capacity Confounds in Neuroimaging Studies of Conscious Awareness.Jorge Morales, Jeffrey Chiang & Hakwan Lau - 2015 - Neuroscience of Consciousness 1:1-11.
    Studying the neural correlates of conscious awareness depends on a reliable comparison between activations associated with awareness and unawareness. One particularly difficult confound to remove is task performance capacity, i.e. the difference in performance between the conditions of interest. While ideally task performance capacity should be matched across different conditions, this is difficult to achieve experimentally. However, differences in performance could theoretically be corrected for mathematically. One such proposal is found in a recent paper by Lamy, Salti and Bar-Haim [Lamy (...)
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  8.  6
    The Metaperceptual Function: Exploring Dissociations Between Confidence and Task Performance with Type 2 Psychometric Curves.Brian Maniscalco, Olenka Graham Castaneda, Brian Odegaard, Jorge Morales, Sivananda Rajananda & Megan Peters - manuscript
    Confidence can dissociate from perceptual accuracy, suggesting distinct computational and neural processes underlie these psychological functions. Recent investigations have therefore sought to experimentally isolate metacognitive processes by creating conditions where perceptual sensitivity is matched but confidence differs (“matched-performance / different-confidence”; MPDC). Despite these endeavors’ success, much remains unknown about MPDC effects and how to best harness them in experimental settings. Here we developed a principled approach to comprehensively characterizing MPDC effects through analyzing metaperceptual (i.e., type 2 psychometric) functions relating objective (...)
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  9. Greatness-service MC 9, 33-37, 10, 41-45 and significant role regarding the monitoring in section 8, 27-10, 52.Jorge Morales - 1994 - Franciscanum 36 (106-108):9-100.
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  10. Introspection Is Signal Detection.Jorge Morales - forthcoming - British Journal for the Philosophy of Science.
    Introspection is a fundamental part of our mental lives. Nevertheless, its reliability and its underlying cognitive architecture have been widely disputed. Here, I propose a principled way to model introspection. By using time-tested principles from signal detection theory (SDT) and extrapolating them from perception to introspection, I offer a new framework for an introspective signal detection theory (iSDT). In SDT, the reliability of perceptual judgments is a function of the strength of an internal perceptual response (signal- to-noise ratio) which is, (...)
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  11. Low Attention Impairs Optimal Incorporation of Prior Knowledge in Perceptual Decisions.Jorge Morales, Guillermo Solovey, Brian Maniscalco, Dobromir Rahnev, Floris P. de Lange & Hakwan Lau - 2015 - Attention, Perception, and Psychophysics 77 (6):2021-2036.
    When visual attention is directed away from a stimulus, neural processing is weak and strength and precision of sensory data decreases. From a computational perspective, in such situations observers should give more weight to prior expectations in order to behave optimally during a discrimination task. Here we test a signal detection theoretic model that counter-intuitively predicts subjects will do just the opposite in a discrimination task with two stimuli, one attended and one unattended: when subjects are probed to discriminate the (...)
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  12. Measuring Away an Attentional Confound?Jorge Morales, Yasha Mouradi, Claire Sergent, Ned Block, Vincent Taschereau-Dumouchel, David Rosenthal, Piercesare Grimaldi & Hakwan Lau - 2017 - Neuroscience of Consciousness 3 (1):1-3.
    A recent fMRI study by Webb et al. (Cortical networks involved in visual awareness independent of visual attention, Proc Natl Acad Sci U S A 2016;113:13923–28) proposes a new method for finding the neural correlates of awareness by matching atten- tion across awareness conditions. The experimental design, however, seems at odds with known features of attention. We highlight logical and methodological points that are critical when trying to disentangle attention and awareness.
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  13.  71
    Razonamiento Animal: Negación y Representaciones de Ausencia.Jorge Morales - 2011 - Revista Argentina de Ciencias Del Comportamiento 3 (1):20-33.
    In this paper, I reject that animal reasoning, negation in particular, necessarily involves the representation of absences, as suggested by Bermúdez (2003, 2006, 2007), since this would still work as a logical negation (unavailable for non-linguistic creatures). False belief, pretense, and communication experiments show that non-human animals (at least some primates) have difficulties representing absent entities or properties. I offer an alternative account resorting to the sub-symbolic similarity judgments proposed by Vigo & Allen (2009) and expectations: animal proto-negation takes place (...)
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  14.  17
    The Discovery/Justification Context Dichotomy Within Formal and Computational Models of Scientific Theories: A Weakening of the Distinction Based on the Perspective of Non-Monotonic Logics.Jorge A. Morales & Mauricio Molina Delgado - 2016 - Journal of Applied Non-Classical Logics 26 (4):315-335.
    The present paper analyses the topic of scientific discovery and the problem of the existence of a logical framework involved in such endeavour. We inquire how several non-monotonic logic frameworks and other formalisms can account for such a task. In the same vein, we analyse some key aspects of the historical and theoretical debate surrounding scientific discovery, in particular, the context of discovery and context of justification context distinction. We present an argument concerning the weakening of the discovery/justification context dichotomy (...)
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  15. The Easter of Jesus Christ as seen through the Psalms.Jorge Morales - 1995 - Franciscanum 37 (109-110):13-58.
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  16. The Neural Substrates of Conscious Perception Without Performance Confounds.Jorge Morales, Brian Odegaard & Brian Maniscalco - forthcoming - In Felipe De Brigard & Walter Sinnott-Armstrong (eds.), Anthology of Neuroscience and Philosophy.
    To find the neural substrates of consciousness, researchers compare subjects’ neural activity when they are aware of stimuli against neural activity when they are not aware. Ideally, to guarantee that the neural substrates of consciousness—and nothing but the neural substrates of consciousness—are isolated, the only difference between these two contrast conditions should be conscious awareness. Nevertheless, in practice, it is quite challenging to eliminate confounds and irrelevant differences between conscious and unconscious conditions. In particular, there is an often-neglected confound that (...)
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