Mechanisms of selective attention exert a powerful influence on visual perception. We examined whether attentional selection is necessary for generation of the vivid colours experienced by individuals with grapheme-colour synaesthesia. Twelve synaesthetes and matched controls viewed rapid serial displays of nonsense characters within which were embedded an oriented grating (T1) and a letter-prime (T2), forming a modified attentional blink (AB) task. At the end of the stream a coloured probe appeared that was either congruent or incongruent with the synaesthetic colour (...) elicited by the letter-prime. When the prime was attended, synaesthetes showed a reliable effect of prime-probe congruency. In contrast, when the prime appeared at 350 ms following T1 (during the AB), the congruency effect was eliminated. Our findings suggest that focused attention is crucial for inducing letters to elicit colours in synaesthesia. © 2009 Elsevier B.V. All rights reserved. (shrink)

This book is a fundamental and unique masterpiece which reflects the discussions on business and economic ethics over decades in German-speaking countries, and ...

Mechanisms of attention play a crucial role in filtering sensory inputs from the external world, allowing information to be prioritised for goal directed behaviour. To what extent might these same capacity-limited processes influence grapheme-colour synaesthesia, in which letters, numbers or words evoke concurrent experiences of colour? Asking synaesthetes themselves whether attention seems important in their experiences has provided a range of answers. On the one hand, for some synaesthetes, diverting attention can diminish the quality of their synaesthetic colours. On the (...) other, there are suggestions that synaesthetic experiences can themselves alter the manner in which attention is allocated to sensory stimuli in the environment. Here, we review a range of empirical investigations that have examined the role of attention in grapheme-colour synaesthesia. A particular focus of these studies has been the extent to which an inducing stimulus - such as an achromatic letter or digit - must be attended or consciously perceived to trigger a concurrent synaesthetic experience. In most cases, limiting attention or masking inducers tends to reduce or eliminate behavioural evidence of synaesthetic experiences. We also discuss how synaesthesia might improve performance in visual search tasks through post-attentive processes such as grouping, or by facilitating decision-making processes. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Body and Soul in the Philosophy of Plotinus AUDREY N. M. RICH BEFORE THE TIME Of Aristotle, there had been no serious philosophical enquiry into the relation existing between the body and the soul. Admittedly, in those Dialogues of Plato in which the problem of Motion begins to assume importance, something approaching a scientific interest in the question starts to emerge. In the Phaedrus, for instance, the soul is (...) considered as the source of all bodily movement and change,1 and in the Timaeus, the interaction of body and soul is given some attention and a special bodily organ allotted to each phase of the tripartite soul (69c-71a). But it is fair to say that on the whole, Plato does not give the impression of being vitally concerned about the soul-body relation. In fact, in the Phaedo, he makes it abundantly clear that he views such an association as morally regrettable rather than scientifically interesting; at this stage of his thought, he prefers, like Socrates, to ignore such questions as those discussed by Empedocles and Alcmaeon, namely, "whether we think with the blood, or whether it is the brain that is the seat of sensation" (96b). Thus, to some extent Plato merits the censure of Aristotle who, in the De Anirna (I:1,407b15-18), ranks him among those who "associate the soul with and place it in the body without specifying why this is so and how the body is conditioned." In Aristotle's opinion, examination of the soul-body connection is essential: "for it is by this association that the one acts and the other is acted upon, that the one moves and the other is moved; and no such mutual relation is found in haphazard combinations" (407b 18-21). Now there is a strong likelihood that Aristotle's criticism of Plato on this point may have led Plotinus to take up the problem to some extent neglected by his master. He must have known the De Anima, probably through the commentaries of Alexander of Aphrodisias which, we know, were read in his school along with the writings of other Peripatetics like Aspasius and Adrastus2; and although he did not himself envisage the soul-body relation in Aristotelian terms, nevertheless his whole enquiry into the subject is deeply colored by the language and influence of the De Anirna. Of course, Plotinus is much too loyal a Platonist to remain untouched by the dualism of the t245c-e; cp. Laws X: 898c5. ~Porphyry, Life of Plotinus, c. 15. [q 2 HISTORY OF PHILOSOPHY Phaedo, and the undertone of suspicion and hostility toward the body which is lacking in the De Anima but present in much of Plato, runs right through the Enneads of Plotinus. In fact, almost the last words of his final treatise on psychology reveal that this uneasy attitude persists to the end: "Life in the body," he says, "is in itself evil.''~ Strictly speaking, however, the extreme dualism of a Dialogue like the Phaedo has no real place in Plotinus' system. In his view, both body and soul are alike descended from the primal Absolute or One; each represents a different stage in the evolution of plurality from unity; soul is an earlier stage, body, a later; and though soul does not require body in order to exist, nevertheless, without body, it could never come forth fTom the intelligible realm to display its powers in the visible universe (IV: 3.9). Thus, because body is, in a sense, necessary to soul, because, figuratively speaking, it is the only "place" appropriate for the soul's occupation (IV: 3.9), it is impossible to view the relation between body and soul as one of unmitigated hostility. For to some extent, body and soul imply each other. On the cosmic level indeed, they never exist apart. For though we may speak of the "ensoulment" (~Ft~c0oLg) of the cosmos, because the cosmos is, in fact, eternal and uncreated, there never was a time when its soul and its body were dissociated (IV : 3.9). In the case of the human soul and body, however, matters are rather different, since it is evident that the two were separate... (shrink)

1. Theologische Grundlegung.--2. Wirtschaftsethik. 2 v.--3. Politische Ethik (Staat und Revolution).

[Bd. 1.] Grundlagen in theologischer Perspektive -- Bd. 2. Marktwirtschaft, Planwirtschaft, Weltwirtschaft aus sozialethischer Sicht.