Sleep researchers in different disciplines disagree about how fully dreaming can be explained in terms of brain physiology. Debate has focused on whether REM sleep dreaming is qualitatively different from nonREM (NREM) sleep and waking. A review of psychophysiological studies shows clear quantitative differences between REM and NREM mentation and between REM and waking mentation. Recent neuroimaging and neurophysiological studies also differentiate REM, NREM, and waking in features with phenomenological implications. Both evidence and theory suggest that there are isomorphisms between (...) the phenomenology and the physiology of dreams. We present a three-dimensional model with specific examples from normally and abnormally changing conscious states. Key Words: consciousness; dreaming; neuroimaging; neuromodulation; NREM; phenomenology; qualia; REM; sleep. (shrink)

Sleep researchers in different disciplines disagree about how fully dreaming can be explained in terms of brain physiology. Debate has focused on whether REM sleep dreaming is qualitatively different from nonREM (NREM) sleep and waking. A review of psychophysiological studies shows clear quantitative differences between REM and NREM mentation and between REM and waking mentation. Recent neuroimaging and neurophysiological studies also differentiate REM, NREM, and waking in features with phenomenological implications. Both evidence and theory suggest that there are isomorphisms between (...) the phenomenology and the physiology of dreams. We present a three-dimensional model with specific examples from normally and abnormally changing conscious states. Key Words: consciousness; dreaming; neuroimaging; neuromodulation; NREM; phenomenology; qualia; REM; sleep. (shrink)

This paper considers the Cartesian theatre as a metaphor for the virtual reality models that the brain uses to make inferences about the world. This treatment derives from our attempts to understand dreaming and waking consciousness in terms of free energy minimization. The idea here is that the Cartesian theatre is not observed by an internal audience but furnishes a theatre in which fictive narratives and fantasies can be rehearsed and tested against sensory evidence. We suppose the brain is driven (...) by the imperative to infer the causes of its sensory samples; in much the same way as scientists are compelled to test hypotheses about experimental data. This recapitulates Helmholtz's notion of unconscious inference and Gregory's treatment of perception as hypothesis testing. However, we take this further and consider the active sampling of the world as the gathering of confirmatory evidence for hypotheses based on our virtual reality. The ensuing picture of consciousness resolves a number of seemingly hard problems in consciousness research and is internally consistent with current thinking in systems neuroscience and theoretical neurobiology. In this formalism, there is a dualism that distinguishes between the process of inference and the process that entails inference. This separation is reflected by the distinction between beliefs and the physical brain states that encode them. This formal approach allows us to appeal to simple but fundamental theorems in information theory and statistical thermodynamics that dissolve some of the mysterious aspects of consciousness. (shrink)

This essay addresses Cartesian duality and how its implicit dialectic might be repaired using physics and information theory. Our agenda is to describe a key distinction in the physical sciences that may provide a foundation for the distinction between mind and matter, and between sentient and intentional systems. From this perspective, it becomes tenable to talk about the physics of sentience and ‘forces’ that underwrite our beliefs (in the sense of probability distributions represented by our internal states), which may ground (...) our mental states and consciousness. We will refer to this view as Markovian monism, which entails two claims: (1) fundamentally, there is only one type of thing and only one type of irreducible property (hence monism). (2) All systems possessing a Markov blanket have properties that are relevant for understanding the mind and consciousness: if such systems have mental properties, then they have them partly by virtue of possessing a Markov blanket (hence Markovian). Markovian monism rests upon the information geometry of random dynamic systems. In brief, the information geometry induced in any system—whose internal states can be distinguished from external states—must acquire a dual aspect. This dual aspect concerns the (intrinsic) information geometry of the probabilistic evolution of internal states and a separate (extrinsic) information geometry of probabilistic beliefs about external states that are parameterised by internal states. We call these intrinsic (i.e., mechanical, or state-based) and extrinsic (i.e., Markovian, or belief-based) information geometries, respectively. Although these mathematical notions may sound complicated, they are fairly straightforward to handle, and may offer a means through which to frame the origins of consciousness. (shrink)

Where does consciousness come from and how does it work? Is it a purely biological thing? Where does the brain leave off and the mind begin? These questions, once viewed as ethereal and impossible to study empirically, are now being addressed by science in bold and startling new ways.In Consciousness, world-renowned neuropsychiatrist J. Allan Hobson presents a witty and introspective consideration of this mysterious concept, connecting it to specific areas of the brain and their chemical and physical states. Hobson guides (...) his readers through the various states of waking, dreaming, and nonconsciousness using the theories and data of neuroscience, psychiatry, and neurophysiology. Although his ideas are based in science, his imaginative approach keeps us in touch with the mysterious and seductive nature of his subject.Richly woven, with references to literature, philosophy, and the author's personal experiences, Consciousness is a delightful and compact introduction to a concept central to the human experience. (shrink)

We have investigated the emotional profile of dreams and the relationship between dream emotion and cognition using a form that specifically asked subjects to identify emotions within their dreams. Two hundred dream reports were collected from 20 subjects, each of whom produced 10 reports. Compared to previous studies, our method yielded a 10-fold increase in the amount of emotion reported. Anxiety/fear was reported most frequently, followed, in order, by joy/elation, anger, sadness, shame/guilt, and, least frequently, affection/eroticism. Unexpectedly, there was no (...) significant difference in the profiles of emotion reported by men and women. When the reports were scored for bizarreness, a significant correlation was found between the occurrence of bizarreness and major shifts in emotion. These results support the conclusion that dreaming is a mental state whose general emotional features are widely shared across individuals and strongly linked to cognitive features within individual dreams. (shrink)

The studies reported in the following articles are aimed at providing a comprehensive, detailed, and quantitative picture of cognition in human dreaming. Our main premises are that waking, REM sleep, and non-REM sleep represent physiologically distinct and identifiable brain states and that the differences between waking, REM, and NREM mentation reflect these physiological differences. We have studied dreams at a formal level of analysis and, in these papers, have studied the specific dream properties of emotions, bizarre transformations, scene shifts, and (...) plot coherence, in adults and 4- to 10-year-old children, as part of a larger effort to map state-dependent mental phenomena back onto the varying neurobiological processes that must underlie them. We believe that such efforts will enhance our understanding not only of dreaming and its neurophysiological substrates, but also of the cognitive processes that dreaming shares with other unusual mental states. (shrink)

Thinking is known to be state dependent but a systematic study of how thinking in dreams differs from thinking while awake has not been done. The study consisted of analyzing the dream reports of 26 subjects who, in addition to providing dream reports also provided answers to questions about their thinking within the dream. Our hypothesis was that thinking in dreams is not monolithic but has two distinct components, one that is similar to wake-state cognition, and another that is fundamentally (...) different. We found that cognition within a dream scenario was similar to that of wake-state cognition, but that thinking about the scenario itself was deficient and very different than wake-state thinking. (shrink)

Argues that the brain and the mind are one--that the thoughts, feelings, dreams, and memories that constitute our consciousness are in fact an amalgam of electrical impulses and chemical interactions.

We would like to thank Dolega and Dewhurst for a thought-provoking and informed deconstruction of our article, which we take as applause from valued members of our audience. In brief, we fully concur with the theatre-free formulation offered by Dolega and Dewhurst and take the opportunity to explain why we used the Cartesian theatre metaphor. We do this by drawing an analogy between consciousness and evolution. This analogy is used to emphasize the circular causality inherent in the free energy principle. (...) We conclude with a comment on the special forms of active inference that may be associated with selfawareness and how they may be especially informed by dream states. (shrink)

The "Nightcap," a relatively nonintrusive and "user-friendly" sleep monitoring system, was used by 11 subjects on 10 consecutive nights in their homes. Eighty-eight sleep mentation reports were obtained after spontaneous awakenings from Nightcap-identified REM sleep and 61 were obtained from NREM awakenings. Sleep mentation was recalled in 83% of REM reports and 54% of NREM reports. The median length of REM reports was 148 words compared to 21 words for NREM reports. Twenty-four percent of the REM reports were over 500 (...) words long; no NREM reports over 500 words were obtained. REM report lengths were lowest during the first 15 min of the REM cycle and longest 15–45 min into the period. In contrast, 7 of the 9 NREM reports more than 100 words long occurred within the first 15 min of NREM periods. The Nightcap thus appears to be an effective and efficient method of collecting large numbers of sleep mentation reports with correlated sleep staging under normal ecological conditions. (shrink)

This study investigated the relationship between dream emotion and dream character identification. Thirty-five subjects provided 320 dream reports and answers to questions on characters that appeared in their dreams. We found that emotions are almost always evoked by our dream characters and that they are often used as a basis for identifying them. We found that affection and joy were commonly associated with known characters and were used to identify them even when these emotional attributes were inconsistent with those of (...) the waking state. These findings are consistent with the finding that the dorsolateral prefrontal cortex, associated with short-term memory, is less active in the dreaming compared to the wake brain, while the paleocortical and subcortical limbic areas are more active. The findings are also consistent with the suggestion that these limbic areas have minimal input from the dorsolateral prefrontal cortex in the dreaming brain. (shrink)

In this book J. Allan Hobson offers a new understanding of altered states of consciousness based on knowledge of how our brain chemistry is balanced when we are...

A novel "dream splicing" technique allows the objective evaluation of thematic coherence in dreams. In this study, dream reports were cut into segments and segments randomly recombined to form spliced reports. Judges then attempted to distinguish spliced reports from intact ones. Five judges correctly scored 22 spliced and intact reports 82% of the time ; 13 of the 22 reports were correctly scored by all five judges . We conclude that most dream reports contain sufficient coherence to allow judges to (...) distinguish intact from spliced reports. In contrast, abridged reports, which had all but their first and last five lines removed, were correctly identified in only 10 of 38 reports, suggesting that thematic continuity does not normally extend from the beginning to the end of dreams. The continuity identified in this minority of the reports depended on easily identifiable features, such as specific characters, objects, locations, and emotions, rather than on "latent" themes. (shrink)

To extend the hypothesis that bizarre discontinuities in dreams result from the interaction of chaotic, "bottom-up" brainstem activation with "top-down" cortical synthesis, we have performed a detailed analysis of dream discontinuities using a new methodology that allows for objective characterization of this formal dream feature. Transformations of characters and objects in dream reports were found to follow definite associational rules. While there were 11 examples of character–character transformation and 7 of inanimate object–inanimate object transformation, transformations of characters into inanimate objects (...) and vice versa were never observed. Judges′ scores on a transformation-matching task further showed that the nature of the transformed character or object is highly constrained by the features of the initial character or object . We conclude that despite the threat to dream coherence posed by bizarre discontinuities, significant coherence is maintained by associational constraints, especially in the case of object and character transformations. (shrink)

In this paper, a new method of quantitatively assessing continuity and discontinuity of visual attention is developed. The method is based on representing narrative information using graph theory. It is applicable to any type of narrative report. Since dream reports are often described as bizarre, and since bizarreness is partially characterized by discontinuities in plot, we chose to test our method on a set of dream data. Using specific criteria for identifying and arranging objects of visual attention, dream narratives from (...) 10 subjects were obtained and mapped onto graphs. The interrater reliabilities were 76% and 91% . Discontinuities in visual attention were quantified by plotting transitions from one part of a graph to another, which provided a spatiotemporal map of attention shifts within a narrative. This procedure was compared with other approaches to discontinuity and also applied to a set of 10 fantasy reports from the same subjects. The results showed that our method includes but transcends other approaches and has the capability to distinguish dream and fantasy reports. To our knowledge, the method provides the most rigorous and reliable measure to date of continuity and discontinuity of attention in narrative reports. (shrink)

The nature and time course of sleep onset mentation was studied in the home environment using the Nightcap, a reliable, cost-effective, and relatively noninvasive sleep monitor. The Nightcap, linked to a personal computer, reliably identified sleep onset according to changes in perceived sleepiness and the appearance of hypnagogic dream features. Awakenings were performed by the computer after 15 s to 5 min of sleep as defined by eyelid quiescence. Awakenings from longer periods of sleep were associated with an increase in (...) reported sleepiness, a decrease in the length of mentation reports, a decrease in the frequency of reports of normal, wake-like thoughts, an increase in the frequency of “unusual thoughts,” and increased frequencies of formal dream features, including visual hallucination, self-representation, fictive movement, narrative plot, and bizarreness. While sleep-onset reports can include all features of rapid eye movement dream reports, the number of such features is markedly reduced at sleep onset, suggesting that this mentation is a greatly diminished version of REM dreaming. (shrink)

We have conducted a home-based study of children′s dream reports in which parents used open-ended interviewing styles to collect 88 dream reports from their 4- to 10-year-old children in the comfortable and supportive environment of their own homes. Particular attention was paid to formal properties including characters , settings, self-representation, and bizarreness. In contrast to previous studies, our data indicate that young children are able to give long, detailed reports of their dreams that share many formal characteristics with adult dream (...) reports. Because this wide range of dream mentation is only revealed to trusted confidants in a familiar and comfortable environment, an important implication is that the sleep laboratory may not be the best source of naturalistic dream data. (shrink)

Dreaming consciousness can be quite different from waking consciousness and this difference must depend upon the underlying neurobiology. Our approach is to infer the underlying brain basis for this difference by studying dream reports and comparing them with waking. In this study we investigated mentation during dreaming by asking subjects to provide us with dream reports and by asking them to create a dream log. In the dream log, the subjects recorded all implausibility, illogicality or inappropriateness of character during the (...) dream narrative when compared to the character’s real-life waking counterpart. Thus, the dream acted as its own control in comparing waking and dreaming mentation. (shrink)

Recent neuropsychological data indicating that an absence of dreaming follows lesions of frontal subcortical white matter have been interpreted by Solms as supportive of Freud's wish-fulfillment, disguise-censorship dream theory. The purpose of this commentary is to call attention to Solms's commitment to Freud and to challenge and contrast his specific arguments with the simpler and more complete tenets of the activation-synthesis hypothesis. [Hobson et al.; Nielsen; Solms].

To test the notion that shifts in visual imagery and attention are correlated with experiences of emotion, we studied 10 dream reports using an affirmative probe of emotion and a quantitative measure of plot discontinuity. We found that emotion, especially changes in emotion, are correlated with discontinuities in visual imagery. These correlations are quantified using a new graph theoretical method for analyzing narrative reports.

Consciousness undergoes dramatic and stereotyped changes in parallel with changes in brain state over the sleep‐wake cycle. No change is more striking or more informative than that which differentiates waking and REM sleep dreaming. For example, dreaming is characterized by internally generated perceptions, by false beliefs, by cognitive impairments, by emotional intensification, and by amnesia. When they occur in waking, these formal state features characterize what is called mental illness. Because the underlying changes in brain state are well described, it (...) is possible to create a model which links the formal features of the mental state to changes in brain physiology and chemistry. The resulting synthesis of conscious state phenomenology and brain neurophysiology provides a solid foundation for mind‐body integration in both normal and abnormal conditions. (shrink)

What is dreaming, and what causes it? Why are dreams so strange, and why are they so hard to remember? Replacing dream mystique with modern dream science, J. Allan Hobson provides a new and increasingly complete picture of how dreaming is created by the brain. Dreaming explores how the new science of dreaming is affecting theories in psychoanalysis, and how it is helping our understanding of the causes of mental illness. Through an investigation of his own dreams to illustrate and (...) explain some of the fascinating discoveries of modern sleep science, Hobson challenges some of the traditionally accepted theories about the meaning of dreams and reveals why sleep is not just good for health but essential for life. (shrink)

This Routledge Revival sees the reissue of a seminal work by British economist, sociologist and academic John A. Hobson, elucidating his views on a variety of topics across the social sciences. He makes particular reference to the struggle between the disinterested urge of the social scientist and the interests and other motive forces which tend to influence and mould his processes of inquiry. The work is split into three parts, focussing upon free-thinking, economics and political ethics respectively.

First published in 1931, this is an attempt by the great economist J. A. Hobson to analyse the relations between economics and religion. After considering the origins of the conflicts and compromises between God and Mammon in the life of primitive man, the author concerns himself primarily with medieval and modern Christianity and the business climate and ethos corresponding with these periods. In particular he focuses upon Catholicism and Protestantism, before considering the attitude of the church towards modern economic movements.

First published in 1913, this _Routledge Revivals_ title reissues J. A. Hobson’s seminal analysis of the causal link between the rise in gold prices and the increase in wages and consumer buying power in the early years of the Twentieth Century. Contrary to the assertions of some notable contemporary economists and businessmen, Hobson contended that the relationship between gold prices and wages was in fact much more complex than it initially appeared and that there were significantly more important factors in (...) the rise of contemporary wealth, such as the rapid enlargement of state enterprise and joint stock companies; a wide extension of banking and general financial apparatus; and the opening of profitable fields of investment for the development of underdeveloped countries, which helped raise the rate of interest and profits. (shrink)