After the first callosotomy surgeries were performed, the general consensus among the medical community was that severing the corpus callosum had relatively little, if any, effect on an individual's behavior. Nearly twenty years later, researchers discovered that, under experimental conditions, the two hemispheres could simultaneously maintain very different interpretations of the same stimulus. These findings immediately called into question the unity of subjective experience, a fundamental characteristic of human consciousness. How could the split‐brain patient not experience any disruption (...) in his experience as a unified self when the two hemispheres are physically and functionally disconnected? In this chapter, we review the research that has led to a conceptualization of the split brain as two minds within one body and the implications of this research for the scientific study of consciousness. We argue that consciousness is a neural function that emerges from the integration of information across available functional modules. (shrink)

This paper challenges the widely held theory that split-brain patients have ‘two-minds’ and can thus be described as being two distinct persons. A distinction is made between the singularity of mind and the coherence of mind. It is stressed that ‘a single mind’ is not something posited to explain coherence among mental contents, but is merely a mark that such coherence holds to a certain degree. However, there is no sharp dividing line regarding what counts as a single (...) mind. It is argued that mental coherence is always a matter of degree, and that our concept of a single mind can accomodate spit-brain phenomena. (shrink)

This paper challenges the widely held theory that split-brain patients have ‘two-minds’ and can thus be described as being two distinct persons. A distinction is made between the singularity of mind and the coherence of mind. It is stressed that ‘a single mind’ is not something posited to explain coherence among mental contents, but is merely a mark that such coherence holds to a certain degree. However, there is no sharp dividing line regarding what counts as a single (...) mind. It is argued that mental coherence is always a matter of degree, and that our concept of a single mind can accomodate spit-brain phenomena. (shrink)

In the period running roughly from 1810 to 1860, French brain research remained split into two large provinces, each of which provided its own epistemological principles, methodological rules, and theoretical aims for the study of man’s mind. The controversies resulting from this split concerned issues as diverse as the intelligibility of mental processes, the unitary or the modular structure of cerebral activities, the relations holding between organic matter and mental function, the relevance and evidential weight of (...) clinical and of experimental—i.e., physiological—data for the explanation of the brain’s workings, and other similarly troublesome conceptual, ontological, and metaphysical riddles pertaining to something that had not yet been baptized ‘the mind-body problem’. (shrink)

Teachers obviously serve as the medium for causing the result of policy as they carry it into schools and classrooms and deliver it to pupils. They mediate between education policy and practice. Knowledge of the exact nature and effects of this vital role is limited. Drawing on a range of research and evaluation of both national and local policy in practice, carried out by the authors in England, this paper illustrates how teachers mediate policy and the resulting outcomes. Further, (...) it proposes a typology of teacher adaptation to education policy. The paper argues that as yet the appropriate professional role for teachers within policy?making and implementation has not been achieved, and outlines what this might be. Finally, it outlines some implications for teacher education. (shrink)

Galatea, or the Future of Darwinism W Russell Brain Originally published in 1927 "A brilliant exposition…of the evolutionary hypothesis." The Guardian "Should prove invaluable…" Literary Guide This non-technical but closely-reasoned book is a challenge to the orthodox teaching on evolution known as Neo-Darwinism. The author claims that although Neo-Darwinian theories can possibly account for the evolution of forms, they are quite inadequate to explain the evolution of functions. 88pp ************** Daedalus or Science and the Future J B S Haldane (...) Originally published in 1924. "The essay is brilliant. Sparkling with wit and bristling with challenges." British Medical Journal "Predicts the most startling changes." Morning Post This volume examines the future of scientific research from religious, philosophical social and economic standpoints. 94pp Automaton, or the Future of Mechanical Man H Stafford Hatfield Originally published in 1928 "It is impossible to do justice to his volume in a brief review…"Daily Herald At the time of original publication mankind’s chief inventions had been extensions of his senses or limbs. This work prophesies the dawn of an era in which substitutes will gradually be found even for the human brain. 96pp Gallio or the Tyranny of Science J W N Sullivan Originally published in 1927 "So packed with ideas it is not possible to give any adequate résumé of its contents." Times Literary Supplement "Remarkable monograph…devastating summary of materialism…" Spectator An attack on the values which science is so successfully imposing upon civilization. 90pp. (shrink)

The world of work is being changed at an unprecedented rate as a result of the rise of the Fourth Industrial Revolution. This rate of change was accelerated by the COVID-19 pandemic, which left organizations and their leadership to deal with myriad of challenges. These changes also impacted leaders’ identities in their work and their roles in their organizations. We examine how leaders responded to the various workplace challenges presented by the COVID-19 pandemic and what this meant for their work (...) identities as leaders. To do this, we made use of role identity theory, social identity theory, and leader identity. A qualitative study was conducted with a group of eight senior leaders from various South African and global organizations who had between five and 10 years’ work experience, and some had even more. Data were collected through semi-structured interviews, conducted virtually and in person. Thematic analysis was used to analyze the data. The main finding that emerged from the research was that leaders employed virtual leadership to ensure that customers’ expectations were met, and to manage team-and organizational performance. These leaders achieved this by fostering a digital culture and building effective teams. They achieved their leadership goals by ensuring social identity continuity amongst their teams. This required them taking on extra roles, such as strategist, technology expert, entrepreneur, coach, mentor, and member of the team. Their leader role identity, as part of their work identity, was amplified by the pandemic. The implication is that organizations should develop leadership development programs to increase and strengthen leader identities to capacitate them for times of crisis. (shrink)

Ontologies formally represent reality in a way that limits ambiguity and facilitates automated reasoning and data fusion, but is often daunting to the non-technical user. Thus, many researchers have endeavored to hide the formal syntax and semantics of ontologies behind the constructs of Controlled Natural Languages (CNLs), which retain the formal properties of ontologies while simultaneously presenting that information in a comprehensible natural language format. In this paper, we build upon previous work in this field by evaluating prospects of implementing (...) International Technology Alliance Controlled English (ITACE) as a middleware for ontology editing. We also discuss at length a prototype of a natural language conversational interface application designed to facilitate ontology editing via the formulation of CNL constructs. (shrink)

Category theory has foundational importance because it provides conceptual lenses to characterize what is important and universal in mathematics—with adjunctions being the primary lens. If adjunctions are so important in mathematics, then perhaps they will isolate concepts of some importance in the empirical sciences. But the applications of adjunctions have been hampered by an overly restrictive formulation that avoids heteromorphisms or hets. By reformulating an adjunction using hets, it is split into two parts, a left and a right semiadjunction. (...) Semiadjunctions (essentially a formulation of universal mapping properties using hets) can then be combined in a new way to define the notion of a brain functor that provides an abstract model of the intentionality of perception and action (as opposed to the passive reception of sense-data or the reflex generation of behavior). (shrink)

For ages there has been a gap between the two cultures of the sciences and religions. According to Roger Sperry, science can now bridge the gap between the cold hard facts of the sciences and humanitarian and religious values. Sperry won the Nobel Prize in 1981 for his work on the differences between the left and right halves of the brain. For the past twenty years he has been campaigning for human consciousness and values to be investigated scientificlly. This (...) book describes Sperry's work and his struggle to guide humanity beyond a world divided. terms such as consciousness, value, love and joy are scientifically meaningful, just like terms referring to brain physiology, such as neural pathways and electrical impulse. The split between mind matter, or religion, and science can be removed, says Sperry, by expanding scientific research. Now, conscious experiences must be taken into account as scientific information about the brain. Our values, beliefs and goals can directly affect our brain states and physiology. (shrink)

Split brains that result in two simultaneous streams of consciousness cut off from each other are wrongly held to be grounds for doubting the existence of the divinely created soul. The mistake is based on two related errors: first, a failure to appreciate the soul's dependence upon neurological functioning; second, a fallacious belief that if the soul is simple, i.e. without parts, then there must be a unity to its thought, all of its thoughts being potentially accessible to reflection (...) or even unreflective causal interactions. But a soul theorist can allow neurological events to keep some conscious thoughts unavailable to others. (shrink)

In this paper I argue that split-brain syndrome is best understood within an extended mind framework and, therefore, that its very existence provides support for an externalist account of conscious perception. I begin by outlining the experimental aberration model of split-brain syndrome and explain both: why this model provides the best account of split-brain syndrome; and, why it is commonly rejected. Then, I summarise Susan Hurley’s argument that split-brain subjects could unify their (...) conscious perceptual field by using external factors to stand-in for the missing corpus callosum. I next provide an argument that split-brain subjects do unify their perceptual fields via external factors. Finally, I explain why my account provides one with an experimental aberration model which avoids the problems typically levelled at such views, and highlight some empirical predictions made by the account. The nature of split-brain syndrome has long been considered mysterious by proponents of internalist accounts of consciousness. However, in this paper I argue that externalist theories can provide a straightforward explanation of the condition. I therefore conclude that the ability of externalist accounts to explain split-brain syndrome gives us strong reason to prefer them over internalist rivals. (shrink)

Many have claimed that split-brain patients are actually two persons. I maintain that both the traditional separation argument and the more recent sophistication argument for the two persons interpretation are inadequate on conceptual grounds. An autonomy argument is inadequate on empirical grounds. Overall, theoretical and practical consequences weigh heavily in favor of adopting a one person interpretation.

To assess the ability of the disconnected cerebral hemispheres to recognize images of the self, a split-brain patient was tested using morphed self-face images presented to one visual hemifield at a time while making “self/other” judgments. The performance of the right and left hemispheres of this patient as assessed by a signal detection method was not significantly different, though a measure of bias did reveal hemispheric differences. The right and left hemispheres of this patient independently and equally possessed (...) the ability to self-recognize, but only the right hemisphere could successfully recognize familiar others. This supports a modular concept of self-recognition and other-recognition, separately present in each cerebral hemisphere. (shrink)

Some philosophers have argued that so long as two neural events, within a subject, are both of the same type and both carry the same content, then these events may jointly constitute a single mental token, regardless of the sort of causal relation to each other that they bear. These philosophers have used this claim—which I call the “singularity-through-redundancy” position—in order to argue that a split-brain subject normally has a single stream of consciousness, disjunctively realized across the two (...) hemispheres. This paper argues, against this position, that the kind of causal relations multiple neural events bear to each other constrains the mental tokens with which functionalists who are realists can identify them. (shrink)

In this commentary I use recent empirical evidence and theoretical analyses concerning the importance of language and the meaning of self-recognition to reevaluate the claim that the right mute hemisphere in commissurotomized patients possesses a full consciousness. Preliminary data indicate that inner speech is deeply linked to self-awareness; also, four hypotheses concerning the crucial role inner speech plays in self-focus are presented. The legitimacy of self-recognition as a strong operationalization of self-awareness in the right hemisphere is also questioned on the (...) basis that it might rather tap a preexisting body awareness having little to do with an access to mental events. I conclude with the formulation of an alternative interpretation of commissurotomy according to self-awareness — a “complete” one in the left hemisphere and a “primitive” one in the right hemisphere. (shrink)

Elizabeth Schechter explores the implications of the experience of people who have had the pathway between the two hemispheres of their brain severed, and argues that there are in fact two minds, subjects of experience, and intentional agents inside each split-brain human being: right and left. But each split-brain subject is still one of us.

One of the main problems of the soul theory is how the soul, which has no material properties, interacts with body. Because it is difficult to understand how an immaterial being interacts with matter. In particular, as our scientific understanding of the way the brain works and how it affects our psychology expands, the question of whether a soul is needed for the mind manifests itself more strongly. In this context, current data on the close connection between the (...) class='Hi'>brain and the mind is often used as an objection to the understanding of the soul. One of the recent data that has been claimed to have dealt a heavy blow against the understanding of the soul is the split-brain case. The split-brain case is the name given to the condition of patients whose brain hemispheres are surgically separated from each other. The difference of this case from other cases used against dualism is that it pointed out that the integrity of consciousness also depends on the brain. Because although there was a connection between many mental functions and the brain before, it was not between the unity of consciousness. For it was a new claim that the unity of consciousness also depends on the brain. On the contrary, arguments were used in favor of the existence of the soul, stating that the brain cannot provide the unity of consciousness due to its multi-part structure, and therefore an indivisible soul is necessary. Whereas, in the split-brain case, patients whose brain hemispheres were separated from each other could think and act like two different people. This is interpreted as contrary to the soul view, which argues that the individual and the soul are indivisible. The present study considers whether the split-brain case does indeed offer a strong argument against dualism. In this paper, first of all, more detailed information about the split-brain case will be given. Then, the arguments of those who use this case against dualism and why the issue seems problematic in terms of the soul view will be discussed. Afterwards, some solutions offered by dualists to this problem will be evaluated. There are three different strategies that dualists follow at this point. The first one rejects the idea that consciousness is divided as a result of the split-brain phenomenon, the second rejects the idea that the soul is indivisible, and the third way accepts both, but argues that they are not contradictory, because a single soul can have a divided consciousness. This paper argues that even if it is accepted that more than one stream of consciousness emerges as a result of the split-brain case, this cannot be seen as a finishing blow to dualism. Despite this, the case in question can be regarded as a strong argument against dualism. For a counter-argument to be strong, it does not need to conclusively demonstrate the falsity of what it opposes. It suffices to show the weakness of its probability of being true. In this respect, the split-brain case greatly weakens the probability of dualism being true. (shrink)

Brain bisection raises the intriguing question about how many minds the split-brain patients have. Thomas Nagel and Derek Parfit, who have brought this question into consideration, come to similar conclusions in response to it. They both argue that the question has no answer, that there simply isn’t any countable number of minds that the split-brain patients have. In addition, Parfit argues that the split-brain cases can be adequately described only if we adopt a (...) certain particular view about the metaphysical nature of a person. The goal of this paper is to clarify both of those views and, in particular, to explain why Parfit’s preference for one model of personhood does not determine how many persons survive brain bisection. (shrink)

In this paper it is argued that the experimental data on commissurotomy patients provide no grounds for denying the singular personhood of commissurotomy patients. This is because, contrary to most philosophical accounts, there is no “unity of consciousness” discriminating condition for singular personhood that is violated in the case of commissurotomy patients, and because no contradictions arise when singular personhood is ascribed to commissurotomy patients.

In this paper it is argued that the experimental data on commissurotomy patients provide no grounds for denying the singular personhood of commissurotomy patients. This is because, contrary to most philosophical accounts, there is no “unity of consciousness” discriminating condition for singular personhood that is violated in the case of commissurotomy patients, and because no contradictions arise when singular personhood is ascribed to commissurotomy patients.

. Cognitive science challenges our understandings of self and freedom. In this article, adapted from a chapter in Minding God: Theology and the Cognitive Sciences , I review some of the scientific literature with regard to issues of self and freedom. I argue that our sense of self is a construct and heavily dependent on the kind of brain that we have. Furthermore, understanding the issue of freedom requires an understanding of the findings of cognitive science. Human beings are (...) constrained to be free; our biology in no small way determines the kinds of freedom that we are able to have. (shrink)

It is widely felt that the sorts of ideas current in modern laterality and split-brain research are largely without precedent in the behavioral and brain sciences. This paper not only challenges that view, but makes a first attempt to define the relevance of older concepts and data to present research programs.

The attempt to model the structure of consciousness in split-brain subjects is ongoing. This paper concerns the recently proposed ?switch model? of split-brain consciousness, according to which a split-brain subject possesses only a single stream of consciousness, unified at and across time, that shifts from one hemisphere to the other from moment to moment. The paper argues that while the central explanatory element of the switch model may account for some aspects of split- (...) class='Hi'>brain consciousness, the best general picture of split-brain consciousness is still offered by some version of the ?conscious duality model.? (shrink)

Many experimental findings with split-brain subjects intuitively suggest that each such subject has two minds. The conceptual and empirical basis of this duality intuition has never been fully articulated. This article fills that gap, by offering a reconstruction of early neuropsychological literature on the split-brain phenomenon. According to that work, the hemispheres operate independently of each other insofar as they interact via the mediation of effection and transduction—via behavior and sensation, essentially. This is how your mind (...) and my mind interact with each other, however, giving rise to the intuition that a split-brain subject has two minds. (shrink)

According to conventional wisdom, the split-brain syndrome puts paid to the thesis that consciousness is necessarily unified. The aim of this paper is to challenge that view. I argue both that disunity models of the split-brain are highly problematic, and that there is much to recommend a model of the split-brain—the switch model—according to which split-brain patients retain a fully unified consciousness at all times. Although the task of examining the unity of (...) consciousness through the lens of the split-brain syndrome is not a new one—such projects date back to Nagel’s seminal paper on the topic—the time is ripe for a re-evaluation of the issues. (shrink)

In "Consciousness Explained," Dennett (1991) denies that split-brain humans have double consciousness: he describes the experiments as "anecdotal." In attempting to replace the Cartesian Theatre of the Mind" with his own "Multiple Drafts" view of consciousness, Dennett rejects the notion of the mind as a countable thing in favour of its being a mere "abstraction." His criticisms of the standard interpretation of the split-brain data are analyzed here and each is found to be open to objections. (...) There exist people who have survived left ["dominant"] cerebral hemispherectomy; by Dennett's criteria, they would not have minds. (shrink)

The vulnerability of patients receiving significantly innovative neurosurgical procedures, either as research or as non-standard therapy, presents particularly potent challenges for those attempting to substantially advance clinical Neurosurgical practice in the most ethically and efficacious manner. This beginning formulation has built into it several important notions about research participation, balancing values, and clinical advancement in the context of neurological illness. For the time being, allow vulnerability to act as a placeholder for circumstances or states of being wherein the (...) established checks and balances of power and interest are no longer sufficient in promoting the just treatment of persons. Further, the phrase to substantially advance Neurosurgical practice encompasses radical innovation as well as significant research into new procedures. Finally, few of these explorations involve true randomized placebo controlled trials, but rather they enroll patients rightfully hoping for some benefit by means of undergoing the procedure.When a neurosurgeon asks me, as an ethicist, to meet with a patient who has medically refractory disease and no good standard therapy options remaining, he is asking for help concerning whether to offer, as a last chance, an unproven therapy as either innovation or research. (shrink)

Seven specific challenges in patient vulnerability related to neurosurgical advancement highlight needed augmentations for standards in innovation and research that do not unduly inhibit access to potential therapies while assuring just treatment of patients.

This article defends an affirmative answer to the question indicated in its title using an approach to the Mind-Brain problem developed by the author. Thought reading is possible through deciphering the brain’s neurodynamic code for a given phenomenon of subjective reality. During the past two decades, significant results in that regard have been achieved in the area of neuroscience called “brain reading.” Using examples of these results, the author examines the problem of deciphering the brain’s codes (...) for mental phenomena, the theoretical and methodological challenges involved, and the prospects for further development related to new methods of visualizing and mapping brain activity. The article also shows the primary importance of thorough research on a wide range of social and human questions that this trend in modern neuroscience raises. (shrink)

Some theorists who emphasize the complexity of biological and cognitive systems and who advocate the employment of the tools of dynamical systems theory in explaining them construe complexity and reduction as exclusive alternatives. This paper argues that reduction, an approach to explanation that decomposes complex activities and localizes the components within the complex system, is not only compatible with an emphasis on complexity, but provides the foundation for dynamical analysis. Explanation via decomposition and localization is nonetheless extremely challenging, and an (...) analysis of recent cognitive neuroscience research on memory is used to illustrate what is involved. Memory researchers split between advocating memory systems and advocating memory processes, and I argue that it is the latter approach that provides the critical sort of decomposition and localization for explaining memory. The challenges of linking distinguishable functions with brain processes is illustrated by two examples: competing hypotheses about the contribution of the hippocampus and competing attempts to link areas in frontal cortex with memory processing. (shrink)

Contrary to received opinion among philosophers, psychologists, and neuroscientists, conscious duality as a principle of brain organization is neither incoherent nor demonstrably false. The present paper begins by reviewing the history of the theory and its anatomical basis and defending it against the claim that it rests upon an arbitrary decision as to what constitutes the biological substratum of mind or person.

The startling empirical data that concern us here are well known. Severing the corpus callosum produces a kind of mental bifurcation (Sperry 1968). In one experiment, a garlic smell is presented to a patient.