11,585 research outputs found

    On Experiencing Meaning: Irreducible Cognitive Phenomenology and Sinewave Speech

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    Upon first hearing sinewaves, all that can be discerned are beeps and whistles. But after hearing the original speech, the beeps and whistles sound like speech. The difference between these two episodes undoubtedly involves an alteration in phenomenal character. Oā€™Callaghan (2011) argues that this alteration is non-sensory, but he leaves open the possibility of attributing it to some other source, e.g. cognition. I discuss whether the alteration in phenomenal character involved in sinewave speech provides evidence for cognitive phenomenology. I defend both the existence of cognitive phenomenology and the phenomenal contrast method, as each concerns the case presented here

    Decline and fall:a biological, developmental, and psycholinguistic account of deliberative language processes and ageing

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    Background: This paper reviews the role of deliberative processes in language: those language processes that require central resources, in contrast to the automatic processes of lexicalisation, word retrieval, and parsing. 10 Aims: We describe types of deliberative processing, and show how these processes underpin high-level processes that feature strongly in language. We focus on metalin- guistic processing, strategic processing, inhibition, and planning. We relate them to frontal-lobe function and the development of the fronto-striate loop. We then focus on the role of deliberative processes in normal and pathological development and ageing, 15 and show how these processes are particularly susceptible to deterioration with age. In particular, many of the commonly observed language impairments encountered in ageing result from a decline in deliberative processing skills rather than in automatic language processes. Main Contribution: We argue that central processing plays a larger and more important 20 role in language processing and acquisition than is often credited. Conclusions: Deliberative language processes permeate language use across the lifespan. They are particularly prone to age-related loss. We conclude by discussing implications for therapy

    An Efficient Probabilistic Context-Free Parsing Algorithm that Computes Prefix Probabilities

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    We describe an extension of Earley's parser for stochastic context-free grammars that computes the following quantities given a stochastic context-free grammar and an input string: a) probabilities of successive prefixes being generated by the grammar; b) probabilities of substrings being generated by the nonterminals, including the entire string being generated by the grammar; c) most likely (Viterbi) parse of the string; d) posterior expected number of applications of each grammar production, as required for reestimating rule probabilities. (a) and (b) are computed incrementally in a single left-to-right pass over the input. Our algorithm compares favorably to standard bottom-up parsing methods for SCFGs in that it works efficiently on sparse grammars by making use of Earley's top-down control structure. It can process any context-free rule format without conversion to some normal form, and combines computations for (a) through (d) in a single algorithm. Finally, the algorithm has simple extensions for processing partially bracketed inputs, and for finding partial parses and their likelihoods on ungrammatical inputs.Comment: 45 pages. Slightly shortened version to appear in Computational Linguistics 2

    Amodal Atypical Neural Oscillatory Activity in Dyslexia: A Cross-Linguistic Perspective

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    First Published December 21, 2016It has been proposed that atypical neural oscillations in both the auditory and the visual modalities could explain why some individuals fail to learn to read and suffer from developmental dyslexia. However, the role of specific oscillatory mechanisms in reading acquisition is still under debate. In this article, we take a cross-linguistic approach and argue that both the phonological and orthographic specifics of a language (e.g., linguistic rhythm, orthographic depth) shape the oscillatory activity thought to contribute to reading development. The proposed theoretical framework should allow future research to test cross-linguistic hypotheses that will shed light on the heterogeneity of auditory and visual disorders and their underlying brain dysfunction(s) in developmental dyslexia, and inform clinical practice by helping us to diagnose dyslexia across languages.This research was funded by the European Research Council (ERC Advanced Grant, BILITERACY Project, to M.C.), and the Spanish government (Plan Nacional-PSI2012-32128 and PSI2015-65338-P to M.L., Plan Nacional-PSI2012-32350 and PSI2015-65694-P to N.M., and Plan Nacional-PSI2015-67353-R to M.C.). The Basque Center on Brain Cognition and Language acknowledges funding from Ayuda Centro de Excelencia Severo Ochoa SEV-2015-0490

    Parsing the Plagiary Scandals in History and Law

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    [Excerpt] ā€œIn 2002 the history of History was scandal. The narrative started when a Pulitzer Prize winning professor was caught foisting bogus Vietnam War exploits as background for classroom discussion. His fantasy lapse prefaced a more serious irregularityā€”the author of the Bancroft Prize book award was accused of falsifying key research documents. The award was rescinded. The year reached a crescendo with two plagiarism cases ā€œthat shook the history profession to its core.ā€ Stephen Ambrose and Doris Kearns Goodwin were ā€œcrossoverā€ celebrities: esteemed academicsā€”Pulitzer winnersā€”with careers embellished by a public intellectual reputation. The media nurtured a Greek Tragedy ā€”two superstars entangled in the labyrinth of the worst case academic curseā€”accusations that they copied without attribution. Their careers dangled on the idiosyncratic slope of paraphrasing with its reefs of echoes, mirroring, recycling, borrowing, etc. As the Ambrose-Kearns Goodwin imbroglio ignited critique from the History community, a sequel engulfed Harvard Law School. Alan Dershowitz, Charles Ogletree, and Laurence Tribe were implicated in plagiarism allegations; the latter two ensnared on the paraphrase slope. The New York Times headline anticipated a new media frenzy: When Plagiarismā€™s Shadow Falls on Admired Scholars. Questioned after the first two incidents, the President of Harvard said: ā€œIf you had a third one then I would have said, ā€˜Okay, you get to say this is a special thing, a focused problem at the Law School.ā€™ā€ There was no follow up comment after the Tribe accusation. The occurrence of similar plagiarism packages in two disciplines within an overlapping time frame justifies an inquiry. The following case studies of six accusation narratives identify a congeries of shared issues, subsuming a crossfire of contention over definition, culpability, and sanction. While the survey connects core History-Law commonalities, each case is defined by its own distinctive cluster of signifiers. The primary source for the explication of each signifier cluster is the media of newspaper, trade journal, television, and internet. The media presence is the Articleā€™s motifā€”each case study summarizes a media construct of a slice of the plagiarism debate. By authorā€™s decree the debate is restricted to ā€œpureā€ plagiarism: the appropriation of anotherā€™s text without attribution. The survey is conducted according to chronological order, beginning with History. Ward Churchillā€™s sui generis smutch from plagiarism continues to agitate media coverage. His argument that a dismissal by the University of Colorado for academic misconduct would constitute a cover for a First Amendment protected essay on 9/11 adds more challenge to the plagiary abyss. This Article concludes with up-to-date coverage of the Churchill narrative.

    Probabilistic parsing

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