A number of recent studies have examined the effects of phonological variation on the perception of speech. These studies show that both the lexical representations of words and the mechanisms of lexical access are organized so that natural, systematic variation is tolerated by the perceptual system, while a general intolerance of random deviation is maintained. Lexical abstraction distinguishes between phonetic features that form the invariant core of a word and those that are susceptible to variation. Phonological inference relies on the (...) context of surface changes to retrieve the underlying phonological form. In this article we present a model of these processes in speech perception, based on connectionist learning techniques. A simple recurrent network was trained on the mapping from the variant surface form of speech to the underlying form. Once trained, the network exhibited features of both abstraction and inference in its processing of normal speech, and predicted that similar behavior will be found in the perception of nonsense words. This prediction was confirmed in subsequent research (Gaskell & Marslen-Wilson, 1994). (shrink)

A critical property of the perception of spoken words is the transient ambiguity of the speech signal. In localist models of speech perception this ambiguity is captured by allowing the parallel activation of multiple lexical representations. This paper examines how a distributed model of speech perception can accommodate this property. Statistical analyses of vector spaces show that coactivation of multiple distributed representations is inherently noisy, and depends on parameters such as sparseness and dimensionality. Furthermore, the characteristics of coactivation vary considerably, (...) depending on the organization of distributed representations within the mental lexicon. This view of lexical access is supported by analyses of phonological and semantic word representations, which provide an explanation of a recent set of experiments on coactivation in speech perception (Gaskell & Marslen–Wilson, 1999). (shrink)

The Oxford Handbook of Psycholinguistics brings together the views of 75 leading researchers in psycholinguistics to provide a comprehensive and authoritative review of the current state of the art in psycholinguistics. With almost 50 chapters written by experts in the field, the range and depth of coverage is unequalled.

Most words in English are ambiguous between different interpretations; words can mean different things in different contexts. We investigate the implications of different types of semantic ambiguity for connectionist models of word recognition. We present a model in which there is competition to activate distributed semantic representations. The model performs well on the task of retrieving the different meanings of ambiguous words, and is able to simulate data reported by Rodd, Gaskell, and Marslen‐Wilson [J. Mem. Lang. 46 (2002) 245] (...) on how semantic ambiguity affects lexical decision performance. In particular, the network shows a disadvantage forwords with multiple unrelated meanings (e.g., bark) that coexists with a benefit for words with multiple related word senses (e.g., twist). The ambiguity disadvantage arises because of interference between the different meanings, while the sense benefit arises because of differences in the structure of the attractor basins formed during learning. Words with few senses develop deep, narrow attractor basins, while words with many senses develop shallow, broad basins. We conclude that the mental representations of word meanings can be modelled as stable states within a high‐dimensional semantic space, and that variations in the meanings of words shape the landscape of this space. (shrink)

I respond to Norris et al.'s criticism of Gaskell and Marslen- Wilson (1997). When the latter's network is tested in circumstances comparable to the Merge simulations in the target article, it produces the desired pattern of results. In another area of potential feedback in spoken word processing, aspects of lexical content influence word recognition and our network provides a simple explanation of why such effects emerge. It is unclear how such effects would be accommodated by Merge.

Learning a mapping involves finding regularities in a training set and generalization to novel patterns. Clark & Thornton's type distinction has been discussed in terms of generalization, but has limited value in this respect. However, in terms of detection of regularities in the training set, the distinction is more valid, as it provides a measure of complexity and correlates with the size of search space.

With contributions from the fields of psychology, linguistics, cognitive neuroscience, attention, genetics, development, and neuropsychology divided into five themed sections, this new edition of The Oxford Handbook of Psycholinguistics is unparalleled in its breadth of coverage.

We address the notion of integration of new memory representations and the potential dependence of this phenomenon on sleep, in light of recent findings on the lexicalization of spoken words. A distinction is introduced between measures tapping directly into the strength of the newly acquired knowledge and indirect measures assessing the influence of this knowledge on spoken word identification.

We report on an interview-based study of decision-making capacity in two classes of patients suffering from depression. Developing a method of second-person hermeneutic phenomenology, we articulate the distinctive combination of temporal agility and temporal inability characteristic of the experience of severely depressed patients. We argue that a cluster of decision-specific temporal abilities is a critical element of decision-making capacity, and we show that loss of these abilities is a risk factor distinguishing severely depressed patients from mildly/moderately depressed patients. We explore (...) the legal and clinical consequences of this result. (shrink)

We tend to associate Henry David Thoreau with the renunciation of material possessions, projecting onto him our fantasies of a life lived beyond the modern obsession with "things." But Thoreau's practical philosophy held a special place for tools, artworks, Native American artifacts, and a variety of natural phenomena. In Mindprints, Ivan Gaskell focuses on the material items that were important to Thoreau, using them to reveal Thoreau's unique and profound aesthetics of everyday life and the environment. "Mindprint" was Thoreau's (...) term for a material object that has captured the presence of its maker and first user. Thoreau applied the term to ancient stone artifacts and other objects in an effort to capture something of the relationship between material items and humans. For Thoreau, these relationships contribute to the creation of "worlds." By looking at Thoreau's engagement with material worlds through his writings and his practical philosophical experiment at Walden Pond--but also, importantly, via his work as a designer of improved pencils, as a house builder, as a land surveyor, and as a collector--Gaskell reveals the aesthetics at the heart of Thoreau's thinking. (shrink)

SUMMARYThe nineteenth-century Orientalist and ethnologist, John Crawfurd, publicly rejected Charles Darwin’s theory of evolution in 1868. Crawfurd was a leading advocate of polygenesis but also a supporter of racial equality. In 1820 he published his History of the Indian Archipelago, where he advocated granting household suffrage to all races in the British colonies. After finishing a career in the East India Company in 1828 he became the foremost expert on South-East Asia in Britain. Crawfurd became a regular writer on ethnology (...) and Asian affairs for the Examiner newspaper and in the 1860s he was President of the Ethnological Society of London. Accounts of nineteenth-century anthropology in Britain characterise debate around race as falling into two camps: advocates of monogenesis and advocates of polygenesis. In the United States of America, advocates of polygenesis were often associated with advocates of slavery and racial inequality. Recent research has demonstrated that Charles Darwin’s hatred of slavery drove him to write Origin of the Species to demonstrate the unity of the human species and reject the polygenesis position. This paper explores Crawfurd’s ideas and demonstrates that a belief in polygenesis in the nineteenth century did not necessarily equate with a belief in racial inequality. (shrink)

With the waves of reform occurring in mental health legislation in England and other jurisdictions, mental capacity is set to become a key medico-legal concept. The concept is central to the law of informed consent and is closely aligned to the philosophical concept of autonomy. It is also closely related to mental disorder. This paper explores the interdisciplinary terrain where mental capacity is located. Our aim is to identify core dilemmas and to suggest pathways for future interdisciplinary research. The terrain (...) can be separated into three types of discussion: philosophical, legal and psychiatric. Each discussion approaches mental capacity and judgmental autonomy from a different perspective yet each discussion struggles over two key dilemmas: whether mental capacity and autonomy is/should be a moral or a psychological notion and whether rationality is the key constitutive factor. We suggest that further theoretical work will have to be interdisciplinary and that this work offers an opportunity for the law to enrich its interpretation of mental capacity, for psychiatry to clarify the normative elements latent in its concepts and for philosophy to advance understanding of autonomy through the study of decisional dysfunction. The new pressures on medical and legal practice to be more explicit about mental capacity make this work a priority. (shrink)

Theoria, EarlyView. -/- In his recent book Thin Objects, Øystein Linnebo (2018) argues for the existence of a hierarchy of abstract objects, sufficient to model ZFC, via a novel and highly interesting argument that relies on a process called dynamic abstraction. This paper presents a way for a nominalist, someone opposed to the existence of abstract objects, to avoid Linnebo's conclusion by rejecting his claim that certain abstraction principles are sufficient for reference (RBA). Section 1 of the paper explains Linnebo's (...) argument for RBA. It offers a reading of Linnebo's work upon which he has two arguments for RBA: one deductive and one abductive, and argues that whilst the deductive argument is unsound the abductive one is prima facie plausible. The nominalist must therefore find a way to respond to the abductive argument. Section 2 outlines just such a response, by offering an alternative explanation of the cases Linnebo wishes to argue from. Most interestingly, it shows that abstraction in Linnebo's most difficult case (the “reference to ordinary bodies” case) can be achieved using mereological means, rather than relying on RBA. (shrink)

‘A logical theory may be tested by its capacity for dealing with puzzles, and it is a wholesome plan, in thinking about logic, to stock the mind with as many puzzles as possible, since these serve much the same purpose as is served by experiments in physical science.’ This paper is an attempt to follow Russell’s advice by using a puzzle about the contingent a priori to test and explore certain theories of reference and modality. No one could claim that (...) the puzzle is of any great philosophical importance by itself, but to understand it, one has to get clear about certain aspects of the theory of reference; and to solve it, one has to think a little more deeply than one is perhaps accustomed about what it means to say that a statement is contingent or necessary. (shrink)

This volume collects thirteen papers by one of the leading philosophers of his generation, who died prematurely in 1980.

For phenomenological psychopathologists an important methodological question is which philosopher, or philosophical corpus, one is going to draw on to help organize and illuminate raw psychopathological data. For the main phenomenological psychopathologists of the past this involved selecting from among phenomenological philosophers and keeping close to them to varying degrees. For Minkowski it was Bergson, for von Gebsattel it was Scheler, and for Binswanger it was Heidegger and then Husserl. A question that arises is what makes the choice of philosopher (...) non-arbitrary?A pragmatist, or pluralist, answer to this question which I tend to favor is that psychopathologists... (shrink)

This article examines soldier performance optimisation, enhancement, and augmentation across the three dimensions of physical performance, cognitive performance, and socio-cultural understanding. Optimisation refers to combatants attaining their maximum biological potential. Enhancement refers to combatants achieving a level of performance beyond their biological potential through drugs, surgical procedures, or even gene editing. Augmentation refers to a blending of organic and biomechatronic body parts such as electronic or mechanical implants, prosthetics, and brain–machine interfaces. This article identifies that soldier optimisation is a necessity (...) to protect individual combatants and to give them the ability to make legal and morally justifiable decisions in battle. While enhancement and augmentation of military personnel can lead to accelerated and more destructive warfare, it can also be argued that there is an ethical and moral responsibility to provide combatants the best opportunity for survivability, and that better functioning, less fatigued, and better informed military personnel can make better decisions in battle. There is also a moral responsibility of the state for the combatants themselves, and short-term military success must be balanced against the short- and long-term health and wellbeing of the personnel. This article concludes that it is both the intent and the degree that decide the acceptability. (shrink)

It is occasionally tempting, after climbing a mountain, to use the elevation one has gained to dash up to the top of a connected peak which does not have sufficient interest to induce one to climb so high for its sake alone. It is in this spirit that I turn to Geach's Latin Prose theory of relative clauses. The matter itself is of no very great moment, and some new ground will have to be covered in dealing with Geach's arguments. (...) Nevertheless we shall primarily be applying the theory constructed in the body of the paper, and when one is in a position to expose bad arguments relatively rapidly, it is perhaps a good idea not to leave them unchallenged, especially when they appear to be gaining currency. (shrink)

Some philosophers, notably Professors Quine and Geach, have stressed the analogies they see between pronouns of the vernacular and the bound variables of quantification theory. Geach, indeed, once maintained that ‘for a philosophical theory of reference, then, it is all one whether we consider bound variables or pronouns of the vernacular'. This slightly overstates Geach's positition since he recognizes that some pronouns of ordinary language do function differently from bound variables; he calls such pronouns ‘pronouns of laziness'. Geach's characterisation of (...) pronouns of laziness has varied from time to time, but the general idea should be clear from a paradigm example: A man who sometimes beats his wife has more sense than one who always gives in to her.The pronouns ‘one’ and ‘her’ go proxy for a noun or a noun phrase in the sense that the pronoun is replaceable in paraphrase by simple repetition of its antecedent. (shrink)

Gareth Matthews suggests that we can better understand the nature of philosophical inquiry if we recognize the central role played by perplexity. The seminal representation of philosophical perplexity is in Plato's dialogues; Matthews invites us to view this as a response to something inherently problematic in the basic notions that philosophy deals with. He examines the intriguing shifts in Plato's attitude to perplexity and suggests that this development may be seen as an archetypal pattern that philosophers follow even today. (...) So it is that one may be won over to philosophy in the first place by the example of a Socratic teacher who displays an uncanny gift at getting one perplexed about something one thought one understood perfectly well. Later, however, wanting like Plato to move beyond perplexity to produce philosophical 'results', one may be chagrined to discover that one's very best attempt to develop a philosophical theory induces its own perplexity. Then, like late Plato and like Aristotle, the philosopher may seek to 'normalize' perplexity in a way that both allows for progress and yet respects the peculiarly baffling character of philosophical questions. (shrink)

In this paper, I present an analysis of those aspects of Karl Polanyi's social and political thought that relate to environmentalism and ‘green’ politics today. I discuss whether or not he prefigured the degrowth movement, before focusing on his understanding of the New Deal (1933–1939). At the time of writing, the prospect appears likely of a return, at a global scale, of economic slump, mass unemployment and ecological crisis, the background conditions to which Franklin D. Roosevelt's New Deal was responding (...) on the national scale. The paper concludes by drawing lessons from this comparison for possible Green New Deals. (shrink)