Norris et al. argue against using evidence from phonetic decision making to support top-down feedback in lexical access on the grounds that phonetic decision relies on processes outside the normal access sequence. This leaves open the possibility that bottom-up connectionist models, with some contextual constraints built into the access process, are still preferred models of spoken-word recognition.

Overlaps in form and meaning between morphologically related words have led to ambiguities in interpreting priming effects in studies of lexical organization. In Semitic languages like Arabic, however, linguistic analysis proposes that one of the three component morphemes of a surface word is the CV-Skeleton, an abstract prosodic unit coding the phonological shape of the surface word and its primary syntactic function, which has no surface phonetic content (McCarthy, J. J. (1981). A prosodic theory of non-concatenative morphology, Linguistic Inquiry, 12 (...) 373-418). The other two morphemes are proposed to be the vocalic melody, which conveys additional syntactic information, and the root, which defines meaning. In three experiments using masked, cross-modal, and auditory-auditory priming we examined the role of the vocalic melody and the CV-Skeleton as potential morphemic units in the processing and representation of Arabic words. Prime/target pairs sharing the vocalic melody but not the CV-Skeleton consistently failed to prime. In contrast, word pairs sharing only the CV-Skeleton primed reliably throughout, with the amount of priming being as large as that observed between word pattern pairs sharing both vocalic melody and CV-Skeleton. Priming between morphologically related words can be observed when there is no overlap either in meaning or in surface phonetic form. (shrink)

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)

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)

This article examined the effects of body–object interaction (BOI) on semantic processing. BOI measures perceptions of the ease with which a human body can physically interact with a word's referent. In Experiment 1, BOI effects were examined in 2 semantic categorization tasks (SCT) in which participants decided if words are easily imageable. Responses were faster and more accurate for high BOI words (e.g., mask) than for low BOI words (e.g., ship). In Experiment 2, BOI effects were examined in a semantic (...) lexical decision task (SLDT), which taps both semantic feedback and semantic processing. The BOI effect was larger in the SLDT than in the SCT, suggesting that BOI facilitates both semantic feedback and semantic processing. The findings are consistent with the embodied cognition perspective (e.g., Barsalou's, 1999, Perceptual Symbols Theory), which proposes that sensorimotor interactions with the environment are incorporated in semantic knowledge. (shrink)

This article is guided by principles and practices of bioethics and public health ethics focused on health care reform within the context of promoting Optimal Health. The Tuskegee University National Center for Bioethics in Research and Health Care is moving beyond the traditions of bioethics to incorporate public health ethics and Optimal Health. It is imperative to remember the legacy of the ill-fated research entitled Tuskegee Study of Untreated Syphilis in the Negro Male. Human participant research and health care must (...) be connected to principles of bioethics and public health ethics if the Affordable Care Act is expected to positively impact on the health of people living in the United States. Optimal Health describes a strategy to achieve individual and population health. Health care reform offers an opportunity to shift from the traditional pathology focus of managing diseases to target disease prevention and health promotion with a new set of tools. Transformational change is possible if the lessons learned from the U.S. Public Health Service Syphilis Study at Tuskegee are considered and strategies in bioethics and public heath ethics are employed. (shrink)

I have before me a letter dated January 5, 2000 from Bradford Wilson, the executive director of the NAS. It begins, “I really enjoyed your contribution to the recent symposium in the January issue of First Things, so much so that I’ve also decided to invite you to join the NAS. Many of your fellow contributors including Robert George, Jeffrey Satinover, and Father Neuhaus are among our current members, and I think you’d find it well worth your while if (...) you joined ranks with us yourself.”. (shrink)

I have before me a letter dated January 5, 2000 from Bradford Wilson, the executive director of the NAS. It begins, “I really enjoyed your contribution to the recent symposium in the January issue of First Things, so much so that I’ve also decided to invite you to join the NAS. Many of your fellow contributors including Robert George, Jeffrey Satinover, and Father Neuhaus are among our current members, and I think you’d find it well worth your while if (...) you joined ranks with us yourself.”. (shrink)

Group selection is increasingly being viewed as an important force in human evolution. This paper examines the views of R.D. Alexander, one of the most influential thinkers about human behavior from an evolutionary perspective, on the subject of group selection. Alexander's general conception of evolution is based on the gene-centered approach of G.C. Williams, but he has also emphasized a potential role for group selection in the evolution of individual genomes and in human evolution. Alexander's views are internally inconsistent and (...) underestimate the importance of group selection. Specific themes that Alexander has developed in his account of human evolution are important but are best understood within the framework of multilevel selection theory. From this perspective, Alexander's views on moral systems are not the radical departure from conventional views that he claims, but remain radical in another way more compatible with conventional views. (shrink)

The contributors to _The Anomie of the Earth_ explore the convergences and resonances between Autonomist Marxism and decolonial thinking. In discussing and rejecting Carl Schmitt's formulation of the nomos—a conceptualization of world order based on the Western tenets of law and property—the authors question the assumption of universal political subjects and look towards politics of the commons divorced from European notions of sovereignty. They contrast European Autonomism with North and South American decolonial and indigenous conceptions of autonomy, discuss the legacies (...) of each, and examine social movements in the Americas and Europe. Beyond orthodox Marxism, their transatlantic exchanges point to the emerging categories disclosed by the collapse of the colonial and capitalist frameworks of Western modernity. Contributors. Joost de Bloois, Jodi A. Byrd, Gustavo Esteva, Silvia Federici, Wilson Kaiser, Mara Kaufman, Frans-Willem Korsten, Federico Luisetti, Sandro Mezzadra, Walter D. Mignolo, Benjamin Noys, John Pickles, Alvaro Reyes, Catherine Walsh, Gareth Williams, Zac Zimmer. (shrink)

Working memory limits are best defined in terms of the complexity of the relations that can be processed in parallel. Complexity is defined as the number of related dimensions or sources of variation. A unary relation has one argument and one source of variation; its argument can be instantiated in only one way at a time. A binary relation has two arguments, two sources of variation, and two instantiations, and so on. Dimensionality is related to the number of chunks, because (...) both attributes on dimensions and chunks are independent units of information of arbitrary size. Studies of working memory limits suggest that there is a soft limit corresponding to the parallel processing of one quaternary relation. More complex concepts are processed by or In segmentation, tasks are broken into components that do not exceed processing capacity and can be processed serially. In conceptual chunking, representations are to reduce their dimensionality and hence their processing load, but at the cost of making some relational information inaccessible. Neural net models of relational representations show that relations with more arguments have a higher computational cost that coincides with experimental findings on higher processing loads in humans. Relational complexity is related to processing load in reasoning and sentence comprehension and can distinguish between the capacities of higher species. The complexity of relations processed by children increases with age. Implications for neural net models and theories of cognition and cognitive development are discussed. (shrink)

The core issue of our target article concerns how relational complexity should be assessed. We propose that assessments must be based on actual cognitive processes used in performing each step of a task. Complexity comparisons are important for the orderly interpretation of research findings. The links between relational complexity theory and several other formulations, as well as its implications for neural functioning, connectionist models, the roles of knowledge, and individual and developmental differences, are considered.

Theoretical Perspective on Smell is the first collection of scholarly articles to be devoted exclusively to philosophical research on olfaction. The essays, published here for the first time, bring together leading theorists working on smell in a format that allows for deep engagement with the emerging field, while also providing those new to the philosophy of smell with a resource to begin their journey. The volume’s 14 chapters are organized into four parts: -/- I. The Importance and Beauty of Smell (...) II. Smell in Time and Space III. What We Perceive through Smell IV. Smell and Other Senses -/- The collection solidifies the area as an important emerging branch of perceptual philosophy by presenting the cutting edge research being done by innovative early career researchers, as well as by those more senior and established within the field. -/- Table of Contents 1. Introduction Andreas Keller and Benjamin Young -/- Part I: The Importance and Beauty of Smell -/- 2. The Role of Smell in Consciousness Barry C. Smith -/- 3. The metacognitive gap: Why we both trust and mistrust our sense of smell Ophelia Deroy -/- 4. Perfumes and the Aesthetic Appreciation of Nature Chiara Brozzo -/- 5. Aesthetics, Olfaction, & Environment Michael Aaron Lindquist -/- Part II: Smell in Time and Space -/- 6. Smell and the Space Between Us Clare Batty -/- 7. The Temporal Structure of Olfactory Experience Keith A. Wilson -/- Part III: What We Perceive through Smell -/- 8. How Biology Perceives Chemistry: A Causal Analysis of the Stimulus in Olfaction and its Implications for Scientific and Philosophical Theorizing Ann-Sophie Barwich -/- 9. The Accuracy Conditions of Olfactory Perception Andreas Keller -/- 10. Maybe We Don't Smell Molecular Structure Benjamin D. Young -/- 11. Stuff & Nonsense: Against Mizrahi on Olfaction Harry Sherwood -/- 12. The Layering of Smell William G. Lycan -/- Part IV: Smell and the Other Senses -/- 13. From Odors to Flavors: Perceptual organization in the chemical senses Becky Millar -/- 14. Seeing and hearing flavors Błażej Skrzypulec -/- 15. Smelling Gustatory Qualities Louise Richardson. (shrink)

Previously published: Tokyo: Kodansha International, 2010.

This paper discusses using the Chernobyl Incident as a case study in engineering ethics instruction. Groups of students are asked to take on the role of a faction involved in the Chernobyl disaster and to defend their decisions in a mock debate. The results of student surveys and the Engineering and Science Issues Test indicate that the approach is very popular with students and has a positive impact on moral reasoning. The approach incorporates technical, communication and teamwork skills and has (...) many of the features suggested by recent literature. (shrink)