多目标觉知范式检验视觉意识容量

采用一种新的多目标觉知范式检验视觉意识容量。实验中首先迅速呈现包含8个刺激的圆形阵列（刺激位置随机分布）,然后所有刺激被灰色的圆覆盖,并随机选取阵列中的一个刺激作为目标,要求被试用尽可能少的点击次数找到目标。结果发现,即使被试不能一次击中目标,其也可能拥有对目标不精确的视觉信息。这些不精确的视觉信息能够帮助被试用更少的点击次数和更短的点击距离找到目标,且被试对这些不精确的视觉信息是有意识的。研究结果表明视觉意识能够以概率性的表征存在,并支持视觉整体统计假说,也能够进一步解释视觉意识容量的主观测量和客观测量之间存在的冲突。     

The relation between consciousness and attention: An empirical study using the priming paradigm

Dehaene et al., 2006, Koch and Tsuchiya, 2007 recently proposed taxonomies that distinguish between four processing states, based on bottom-up stimulus strength and top-down attentional amplification. The aim of the present study was to empirically test these processing states using the priming paradigm. Our results showed that attention (prime attended or not) and stimulus strength (prime presented subliminally or not) significantly modulated priming effects: either receiving top-down attention or possessing sufficient bottom-up strength was a prerequisite for a stimulus to elicit priming. When both top-down attention and sufficient bottom-up strength were present, the priming effect was boosted. The origins of the observed priming effects also varied between different processing states. We can conclude that our empirical study using the priming paradigm confirmed the presence of four processing states, which displayed a differential pattern of response priming effects and differential origins of the response priming effects.     

Defining consciousness in the context of incidental sequence learning: theoretical considerations and empirical implications

The notion that sequential regularities can be learned implicitly without ensuing conscious knowledge has sparked off a prolific research program within cognitive psychology. However, there is continuing dissent among researchers about the very existence of the phenomenon. This is, at least in part, due to a failure to ground research on implicit sequence learning in conceptual definitions of “consciousness” and “conscious sequence knowledge.” In this article the authors take up a definition of consciousness according to which conscious mental contents are characterized by their global availability to cognitive processes (e.g., Baars in: A cognitive theory of consciousness Cambridge University Press, 1988; in: In the theater of consciousness: the workspace of the mind Oxford University Press, 1997). It is argued that unlike recognition tests or generate tasks, verbal report is a sensitive and specific measure of conscious (i.e., globally available) sequence knowledge. Finally, it is shown that the choice between two commonly used measures of conscious sequence knowledge can profoundly affect the outcome of a sequence learning experiment.     

Conscious thoughts from reflex-like processes: A new experimental paradigm for consciousness research

The contents of our conscious mind can seem unpredictable, whimsical, and free from external control. When instructed to attend to a stimulus in a work setting, for example, one might find oneself thinking about household chores. Conscious content thus appears different in nature from reflex action. Under the appropriate conditions, reflexes occur predictably, reliably, and via external control. Despite these intuitions, theorists have proposed that, under certain conditions, conscious content resembles reflexes and arises reliably via external control. We introduce the Reflexive Imagery Task, a paradigm in which, as a function of external control, conscious content is triggered reliably and unintentionally: When instructed to not subvocalize the name of a stimulus object, participants reliably failed to suppress the set-related imagery. This stimulus-elicited content is considered ‘high-level’ content and, in terms of stages of processing, occurs late in the processing stream. We discuss the implications of this paradigm for consciousness research.     

Open and closed cortico-subcortical loops: A neuro-computational account of access to consciousness in the distractor-induced blindness paradigm

How the brain decides which information to process ‘consciously’ has been debated over for decades without a simple explanation at hand. While most experiments manipulate the perceptual energy of presented stimuli, the distractor-induced blindness task is a prototypical paradigm to investigate gating of information into consciousness without or with only minor visual manipulation. In this paradigm, subjects are asked to report intervals of coherent dot motion in a rapid serial visual presentation (RSVP) stream, whenever these are preceded by a particular color stimulus in a different RSVP stream. If distractors (i.e., intervals of coherent dot motion prior to the color stimulus) are shown, subjects’ abilities to perceive and report intervals of target dot motion decrease, particularly with short delays between intervals of target color and target motion.We propose a biologically plausible neuro-computational model of how the brain controls access to consciousness to explain how distractor-induced blindness originates from information processing in the cortex and basal ganglia. The model suggests that conscious perception requires reverberation of activity in cortico-subcortical loops and that basal-ganglia pathways can either allow or inhibit this reverberation. In the distractor-induced blindness paradigm, inadequate distractor-induced response tendencies are suppressed by the inhibitory ‘hyperdirect’ pathway of the basal ganglia. If a target follows such a distractor closely, temporal aftereffects of distractor suppression prevent target identification. The model reproduces experimental data on how delays between target color and target motion affect the probability of target detection.     

Explaining consciousness: the hard problem

edited by Jonathan Shear, Bradford/MIT Press 1997. ￡33.95/$40.00 (vii+422 pages) ISBN 0 262 19388 4.     

The consciousness of surrender and the surrendered consciousness: ecstatic dreams of Lord Krishna

This article is based on research at Bhaktivedanta Manor, the main UK centre of the Hare Krishna movement, and it examines ecstatic dreams of Lord Krishna which devotees at the Manor claim to experience. With a focus on one key informant's account of such dreams, the article explores the role the dreams play in spiritual and devotional life. Moving away from psychoanalytic and from similar or related psychological interpretations of spiritual dreams, it advances an alternative approach, a phenomenologically oriented approach rooted in the work of the French philosopher Jean‐Paul Sartre. The article further contends that this provides students and scholars of spiritual dreams with a helpful model, not merely for analysing accounts of ecstatic dreams reported by members of the Hare Krishna movement, but also, perhaps, for interpreting spiritual or ecstatic dreams reported by adherents of other faiths.     

Cephalopod consciousness: behavioural evidence

Behavioural evidence suggests that cephalopod molluscs may have a form of primary consciousness. First, the linkage of brain to behaviour seen in lateralization, sleep and through a developmental context is similar to that of mammals and birds. Second, cephalopods, especially octopuses, are heavily dependent on learning in response to both visual and tactile cues, and may have domain generality and form simple concepts. Third, these animals are aware of their position, both within themselves and in larger space, including having a working memory of foraging areas in the recent past. Thus if using a 'global workspace' which evaluates memory input and focuses attention is the criterion, cephalopods appear to have primary consciousness.     

Measuring consciousness in dreams: The lucidity and consciousness in dreams scale

In this article, we present results from an interdisciplinary research project aimed at assessing consciousness in dreams. For this purpose, we compared lucid dreams with normal non-lucid dreams from REM sleep. Both lucid and non-lucid dreams are an important contrast condition for theories of waking consciousness, giving valuable insights into the structure of conscious experience and its neural correlates during sleep. However, the precise differences between lucid and non-lucid dreams remain poorly understood. The construction of the Lucidity and Consciousness in Dreams scale (LuCiD) was based on theoretical considerations and empirical observations. Exploratory factor analysis of the data from the first survey identified eight factors that were validated in a second survey using confirmatory factor analysis: INSIGHT, CONTROL, THOUGHT, REALISM, MEMORY, DISSOCIATION, NEGATIVE EMOTION, and POSITIVE EMOTION. While all factors are involved in dream consciousness, realism and negative emotion do not differentiate between lucid and non-lucid dreams, suggesting that lucid insight is separable from both bizarreness in dreams and a change in the subjectively experienced realism of the dream.     

Evolutionary psychology: the emperor's new paradigm

For some evolutionary psychology is merely a field of inquiry, but for others it is a robust paradigm involving specific theories about the nature and evolution of the human mind. Proponents of this paradigm claim to have made several important discoveries regarding the evolved architecture of the mind. Highly publicized discoveries include a cheater-detection module, a psychological sex difference in jealousy, and motivational mechanisms underlying parental love and its lapses, which purportedly result in child maltreatment. In this article, I argue that the empirical evidence for these "discoveries" is inconclusive, at best. I suggest that, as the reigning paradigm in evolutionary psychology has produced questionable results, the evolutionary study of human psychology is still in need of a guiding paradigm.     

Missing piece of the puzzle in the science of consciousness: Resting state and endogenous correlates of consciousness

Consciousness still stands as one of the most interesting and the most elusive problems of neuroscience. Finding its correlates is the first step toward its satisfactory explanation. Several theories have proposed its correlates but none of them seem to be generally accepted even though most of them share some very similar elements. These elements are the activity of the thalamus, which is considered by some as the central region for consciousness, and gamma synchronization, which should be the general principal for the emergence of conscious experience. However, all of these proposed theories share one characteristic and that is that they do not take into consideration the recently discovered endogenous activity of the brain, which is generally associated with the default mode network. Although the activity of this large scale brain network is in correlation with various levels of consciousness it is still missing in discussions of consciousness. This review recognizes the importance of endogenous activity and points out the important discoveries of endogenous activity that could be an important step toward a satisfactory explanation of consciousness.     

Distorted temporal consciousness and preserved knowing consciousness in confabulation: a case study

In this study we describe a patient, TA, who developed a chronic amnesic-confabulatory syndrome, following rupture of a right internal carotid siphon aneurysm. Our aim was to elucidate as fully as possible the nature of TA's impairment and to test the hypothesis of confabulation as reflecting a dysfunction of Temporal Consciousness, i.e., to become aware of something as part of a personal past, present or future. TA's confabulations were present in answers to questions tapping Temporal Consciousness, i.e., autobiographical episodic memory, orientation in time and place, and foresight of personal future. In contrast, confabulations were not observed in answers to questions tapping Knowing Consciousness, i.e., to become aware of something as a meaning or as an element of impersonal knowledge. In fact, he had normal access to semantic knowledge, including foresight of impersonal future. TA's brain MRI showed lesions involving the right hippocampus, parahippocampal gyrus, fornix, mammillary bodies, and thalamus. Moreover TA showed sub-cortical lesions involving the caudate and putamen nuclei bilaterally, a lesion site not commonly described in amnesic-confabulatory syndrome. We suggest that this pattern of results is better accounted for within the framework of the Memory, Consciousness and Temporality Theory and reflects a specific distortion of Temporal Consciousness.     

Corporate Crime as Trouble: Reporting on the Corporate Scandals of 2002

Bankruptcies at Enron and other corporations led to revelations of widespread wrongdoing: the Corporate Scandals of 2002. Congressional hearings into the scandals culminated in the Sarbanes-Oxley Act (2002). There was extensive media coverage of these events. Using insights from Emerson and Messinger's (1977 Emerson , Robert and S. Sheldon Messinger . 1977 . “The Micro-Politics of Trouble.” Social Problems 25 : 121 – 134 .[Crossref], [Web of Science ®] , [Google Scholar]) Micro-Politics of Trouble perspective, we consider how three newspapers covered the scandals. We focus on how these scandals were defined, explained, and the remedies that were proposed for them. We consider what the Micro-Politics of Trouble perspective offers for an understanding of these scandals, corporate crime and deviance generally, and the media's role in reporting these issues.