(1) The induced colours led to perceptual grouping and pop-out, (2) a grapheme rendered invisible through ‘crowding’ or lateral masking induced synaesthetic colours — a form of blindsight — and (3) peripherally presented graphemes did not induce colours even when they were clearly visible. Taken collectively, these and other experiments prove conclusively that synaesthesia is a genuine percep- tual phenomenon, not an effect based on memory associations from childhood or on vague metaphorical speech. We identify different subtypes of number–colour synaesthesia (...) and propose that they are caused by hyperconnectivity between col- our and number areas at different stages in processing; lower synaesthetes may have cross-wiring (or cross-activation) within the fusiform gyrus, whereas higher synaesthetes may have cross-activation in the angular gyrus. This hyperconnec- tivity might be caused by a genetic mutation that causes defective pruning of con- nections between brain maps. The mutation may further be expressed selectively (due to transcription factors) in the fusiform or angular gyri, and this may explain the existence of different forms of synaesthesia. If expressed very diffusely, there may be extensive cross-wiring between brain regions that represent abstract concepts, which would explain the link between creativity, metaphor and synaesthesia (and the higher incidence of synaesthesia among artists and poets). Also, hyperconnectivity between the sensory cortex and amygdala would explain the heightened aversion synaesthetes experience when seeing numbers printed in the ‘wrong’ colour. Lastly, kindling (induced hyperconnectivity in the temporal lobes of temporal lobe epilepsy [TLE] patients) may explain the purported higher incidence of synaesthesia in these patients. We conclude with a synaesthesia-based theory. (shrink)

We studied two otherwise normal, synaesthetic subjects who `saw' a speci¢c colour every time they saw a speci¢c number or letter. We conducted four experiments in order to show that this was a genuine perceptual experience rather than merely a memory association. (i)The synaesthetically induced colours could lead to perceptual grouping, even though the inducing numerals or letters did not. (ii)Synaesthetically induced colours were not experienced if the graphemes were presented peripherally. (iii)Roman numerals were ine¡ective: the actual number grapheme was (...) required. (iv)If two graphemes were alternated the induced colours were also seen in alternation. However, colours were no longer experienced if the graphemes were alternated at more than 4 Hz. We propose that grapheme colour synaesthesia arises from `cross-wiring' between the `colour centre' (area V4 or V8)and the `number area', both of which lie in the fusiform gyrus. We also suggest a similar explanation for the representation of metaphors in the brain: hence, the higher incidence of synaesthesia among artists and poets. (shrink)

This article supplements our earlier paper on synaesthesia published in JCS (Ramachandran & Hubbard, 2001a). We discuss the phenomenology of synaesthesia in greater detail, raise several new questions that have emerged from recent studies, and suggest some tentative answers to these questions.

Jones and Coleman are among a handful of otherwise normal as a child and the number 5 was red and 6 was green. This the- people who have synesthesia. They experience the ordinary ory does not answer why only some people retain such vivid world in extraordinary ways and seem to inhabit a mysterious sensory memories, however. You might _think _of cold when you no-man’s-land between fantasy and reality. For them the sens- look at a picture of an ice cube, (...) but you probably do not feel es—touch, taste, hearing, vision and smell—get mixed up in- cold, no matter how many encounters you may have had with stead of remaining separate. ice and snow during your youth. Modern scientists have known about synesthesia since Another prevalent idea is that synesthetes are merely being 1880, when Francis Galton, a cousin of Charles Darwin, pub- metaphorical when they describe the note C flat as “red” or say lished a paper in _Nature _on the phenomenon. But most have that chicken tastes “pointy”—just as you and I might speak of brushed it aside as fakery, an artifact of drug use (LSD and a “loud” shirt or “sharp” cheddar cheese. Our ordinary lan- mescaline can produce similar effects) or a mere curiosity. guage is replete with such sense-related metaphors, and perhaps About four years ago, however, we and others began to un- synesthetes are just especially gifted in this regard. cover brain processes that could account for synesthesia. Along We began trying to find out whether synesthesia is a gen- the way, we also found new clues to some of the most mysteri- uine sensory experience in 1999. This deceptively simple ques- ous aspects of the human mind, such as the emergence of ab- tion had plagued researchers in this field for decades. One nat- stract thought, metaphor and perhaps even language. ural approach is to start by asking the subjects outright: “Is this A common explanation of synesthesia is that the affected just a memory, or do you actually see the color as if it were right people are simply experiencing childhood memories and asso- in front of you?” When we tried asking this question, we did ciations.. (shrink)

Clarke and Beck suggest that the ratio processing system may be a component of the approximate number system, which they suggest represents rational numbers. We argue that available evidence is inconsistent with their account and advocate for a two-systems view. This implies that there may be many access points for numerical cognition – and that privileging the ANS may be a mistake.

In this commentary we discuss a predictive sensorimotor illusion, the size-weight illusion, in which the smaller of two objects of equal weight is perceived as heavier. We suggest that Grush's emulation theory can explain this illusion as a mismatch between predicted and actual sensorimotor feedback, and present preliminary data suggesting that the cerebellum may be critical for implementing the emulator.

Synesthesia is a fascinating phenomenon which has captured the imagination of scientists and artists alike. This inherited condition gives rise to a kind of 'merging of the senses. The Oxford Handbook of Synesthesia brings together a broad body of knowledge about this conditions into one definitive state-of-the-art handbook.

Synesthesia is a fascinating phenomenon which has captured the imagination of scientists and artists alike. This inherited condition gives rise to a kind of 'merging of the senses. The Oxford Handbook of Synesthesia brings together a broad body of knowledge about this conditions into one definitive state-of-the-art handbook.

Cook et al. argue that mirror neurons originate from associative learning processes, without evolutionary influence from social-cognitive mechanisms. We disagree with this claim and present arguments based upon cross-species comparisons, EEG findings, and developmental neuroscience that the evolution of mirror neurons is most likely driven simultaneously and interactively by evolutionarily adaptive psychological mechanisms and lower-level biological mechanisms that support them.

This chapter looks at synaesthesia in school aged children from approximately 5-6 years onwards. We examine how synaesthesia develops from its earliest roots both behaviourally and neurologically, and describe how this development can be affected by literacy and learning. We present evidence showing that synaesthesia emerges over time undergoing stages of 'growth' from an immature to more mature form. We also discuss the prevalence of childhood synaesthesia and the methodologies available for testing this. Next we consider how the condition can (...) have an effect on a child's schooling experience and consider both its psychological and social impact. We show where the condition has costs and benefits for synaesthetic individuals and offer suggestions for parents and educators in their approach to dealing with the synaesthetic child. (shrink)

As Edward Hundert--a philosopher, psychiatrist, and award-winning educator--makes clear in this eloquent interdisciplinary work, the newly emerging model for ...

In 428b.c.e.the city of Mytilene launched a revolt against the Athenians and invited the Spartans to send them assistance. The plans for the revolt were reported to the Athenians (3.2), who sent a force against the city (3.3). The Mytilenians asked for help from the Spartans (3.4.5–6), but the fleet they sent arrived too late to help the city (3.26.4). The revolt appears to have been the initiative of the city's wealthier citizens: Thucydides reports (3.27–8) that heavy armour was not (...) distributed to the people until Salaethus, the leader of the rebellion, realized that Spartan help would not arrive in time. Once the people received this armour, they refused to take orders from officials and held meetings, insisting that the government should distribute all available grain. If they did not, they threatened to negotiate on their own with the Athenians about surrender. The government was powerless to stop them and decided it was best to come to terms with the Athenians. It was agreed that the Athenians would have the power to act as they wished with the city and that the Mytilenians would have the right to send envoys to Athens to plead their case before the Assembly. (shrink)

Two experiments examine the effects of unreportable hints on anagram solving performance and on solvers' subjective experience of insight. In Experiment 1, after seeing a hint presented too briefly to identify, participants solved anagrams preceded by the solution fastest and solved anagrams preceded by unrelated hints slowest. Participants' “warmth” ratings for solution hints were more insight-like than those for unrelated hints. In Experiment 2 a hint, or no hint, was presented at one of three different exposure durations. Participants benefited from (...) solution-relevant hints that were either unreportable or reportable, but showed a cost only for unrelated hints that were reportable. Participants' ratings of their insight experiences showed that unreportable solution and semantically related hints produced more insight-like experiences than did unrelated hints. The results suggest that unreportable processing of solution-related information is important for the insight experience. (shrink)

The kernel of this volume is an English translation of Jan Łukasiewicz’s classic work on the concept of cause (1906). It is the starting point for analytical considerations on causality of two generations of philosophers belonging to the tradition of the Lvov-Warsaw School.

The traditional separation of philosophy, psychiatry, and neuroscience into distinct academic disciplines has led to several discrete approaches to the mind. In an in-depth discussion of major theories from all of these, and related, disciplines, the author progressively reveals fundamental links between these previously unconnected approaches to human thought and experience. The result is a single, unified theory, perhaps the first to integrate all these fields of thought.

On the basis of his acquaintance with theoretical elementary particle physics, and following the lead of Thomas Torrance, John Polkinghorne maintains that the data upon which a science is based, and the method by which it treats those data, must respect the idiosyncratic nature of the object with which the science is concerned. Polkinghorne calls this the "accommodation" (or "conformity") of a discipline to its object. The question then arises: What should we expect religious experience and theological method to be (...) like if they are accommodated to the idiosyncratic nature of God? Polkinghorne's methodological program is typical of postcritical positions in the theology-science dialogue in holding that the fiduciary element in theological method is simply a species of the fiduciary element that is a de facto part of all knowing—in other words, theological method does not differ in fundamental kind from the methods of the natural sciences. But this program may contain the seeds of an alienation of theological method from the transcendence of God similar to the double self-alienation of theology described by Michael Buckley in At the Origins of Modern Atheism. I contend that something like Bernard Lonergan's position on how the method of faith seeking understanding is related to the methods of the natural sciences is exactly the sort of thing that one should expect on the supposition of Polkinghorne's principle of accommodation, at least if the God who is the object of theological science is transcendent. The way in which the divine differs from all other objects ought to be disclosed or reflected in religious experience and theological method. Polkinghorne charts the course for an accommodated theology, but it seems to be Lonergan who is more intent on following it. (shrink)

One of the most ingenious arguments in all of Attic oratory is to be found in the speech Lysias wrote for Euphiletus to deliver at his trial for the murder of Eratosthenes . In his speech Euphiletus first describes to the court how his wife was seduced by Eratosthenes, then recounts how he discovered the affair, caught the adulterer in the act, and, despite an offer to pay compensation, slew him. Euphiletus defends his action by citing the law of the (...) Areopagus that whoever kills an adulterer caught in flagranti with his wife cannot be convicted of murder. Euphiletus further points out that the same exemption applies to the man who catches someone seducing his pallakē. If the lawgiver regarded the seduction of a pallakē as so serious that it merited the death penalty, Euphiletus argues, he must have regarded the seduction of a wife as even more reprehensible, deserving a penalty worse than death. (shrink)

Epistemology — the study of knowledge — is a philosophical discipline with close ties to psychiatry. When epistemologists address specific questions about how knowledge is actually realized by human beings, their philosophy must be informed by empirical studies of the sort psychiatrists now take up in a variety of forms. As this paper describes, psychiatrists can likewise improve their understanding of human psychology through a deeper appreciation of philosophical analysis in epistemology.The aim of this article is to introduce a unifying (...) framework within which the experience from different approaches to psychiatry — (1) the conceptual schemas of cognitive psychiatry, (2) the mental structures of psychoanalytic psychiatry, (3) the categorical forms of existential psychiatry, and (4) the neural pathways of biological psychiatry — can all be applied productively to the central question of epistemology. By establishing a broad understanding of the problem of knowledge, this new view of epistemology is developed within the idiom of each psychiatric approach. In addressing themselves to a unitary problem, these diverse psychiatric approaches are themselves revealed, not as competing points of view, but as complementary views of a single subject. The result is a new epistemology that can not only bring the insights of psychiatry to philosophy, but can also contribute to the care of patients when psychiatrists bring this broader view to their clinical work. (shrink)

While corporate fiduciary duties in many jurisdictions are generally understood to be owed to shareholders, recent Canadian Supreme Court cases have held that directors owe their duties to the corporation, period, not to shareholders or any other stakeholders. This development has introduced significant indeterminacy to the law since it is not clear what such a conception of the duty requires. The Supreme Court did, however, make one clear statement: it held that directors owe a fiduciary duty to ensure that their (...) corporations obey statutory law. Such a duty encourages compliance with law, but may over-encourage compliance: individual directors do not necessarily gain personally from legal breaches, but may lose personally from them because of fiduciary liability, so they will have excessively strong incentives to avoid such breaches. The Article connects the fiduciary duty to obey law with recent developments in financial regulation that have increased the obligations on directors of financial institutions to oversee risk. By requiring directors to be engaged with risk at a governance level, regulators have enhanced the probability that directors will face liability under their fiduciary duties if their institutions do not comply with financial regulations. As the Article explains, the policy tradeoff between enhanced compliance benefits and over-compliance costs of fiduciary liability is different in the context of financial regulation from that in other settings. For example, significant corporate penalties, as opposed to penalties borne by individual directors, may be inconsistent with the prudential goals of regulation, perhaps because of toobig- to-fail concerns. The fiduciary duty to cause the corporation to obey financial regulation, and a stricter application of this duty than the highly deferential standard that exists in Delaware law, has advantages that do not exist in other legal and regulatory contexts. (shrink)