The finding of fractal scaling (FS) in behavioral sequences has raised a debate on whether FS is a pervasive property of the cognitive system or is the result of specific processes. Inferences about the origins of properties in time sequences are causal. That is, as opposed to correlational inferences reflecting instantaneous symmetrical relations, causal inferences concern asymmetric relations lagged in time. Here, I integrate Granger‐causality with inferences about FS. Four simulations illustrate that causal analyses can isolate distinct FS sources, whereas (...) correlational techniques cannot. I then analyze three simultaneous sequences of responses from a database of word‐naming trials. I find that two, or perhaps three, distinct sources account for the presence of FS in these sequences, but FS is not a general property of the system. This suggests that FS arises due to the properties of a limited number of identifiable psychological and/or neural processes. Finally, I reanalyze a previously published dataset of acoustic frequency spectra using the new tools. The causality/criticality combination introduced here offers a new important perspective in the study of cognition. (shrink)

Understanding the changes in our language abilities along the lifespan is a crucial step for understanding the aging process both in normal and in abnormal circumstances. Besides controlled experimental tasks, it is equally crucial to investigate language in unconstrained conversation. I present an information-theoretical analysis of a corpus of dyadic conversations investigating how the richness of the vocabulary, the word-internal structure, and the syntax of the utterances evolves as a function of the speaker's age and sex. Although vocabulary diversity increases (...) throughout the lifetime, grammatical diversities follow a different pattern, which also differs between women and men. Women use increasingly diverse syntactic structures at least up to their late fifties, and they do not deteriorate in terms of fluency through their lifespan. However, from age 45 onward, men exhibit a decrease in the diversity of the syntactic structures they use, coupled with an increased number of speech disfluencies. (shrink)

The finding of fractal scaling (FS) in behavioral sequences has raised a debate on whether FS is a pervasive property of the cognitive system or is the result of specific processes. Inferences about the origins of properties in time sequences are causal. That is, as opposed to correlational inferences reflecting instantaneous symmetrical relations, causal inferences concern asymmetric relations lagged in time. Here, I integrate Granger-causality with inferences about FS. Four simulations illustrate that causal analyses can isolate distinct FS sources, whereas (...) correlational techniques cannot. I then analyze three simultaneous sequences of responses from a database of word-naming trials. I find that two, or perhaps three, distinct sources account for the presence of FS in these sequences, but FS is not a general property of the system. This suggests that FS arises due to the properties of a limited number of identifiable psychological and/or neural processes. Finally, I reanalyze a previously published dataset of acoustic frequency spectra using the new tools. The causality/criticality combination introduced here offers a new important perspective in the study of cognition. (shrink)

Comparisons across languages have long been a means to investigate universal properties of the cognitive system. Although differences between languages may be salient, it is the underlying similarities that have advanced our understanding of language processing. Frost is not unique in emphasizing that the interaction among linguistic codes reinforces the inadequacy of constructing a model of word recognition where orthographic processes operate in isolation.

We agree with Branigan & Pickering that structural priming experiments should supplant grammaticality judgments for testing linguistic representation. However, B&P overlook a vast linguistic literature that converges with – but extends – the experimental findings. B&P conclude that syntax is functionally independent of the lexicon. We argue that a broader approach to priming reveals cracks in the façade of syntactic autonomy.

Abstract In the last 20 years the ruthless competition for natural resources, political instability, armed conflicts, and the terrorist attacks of 9/11 have paved the way for private military and security companies (PMSCs) to operate in areas which were until recently the preserve of the state. PMSCs, less regulated than the toy industry, commit grave human rights violations with impunity. The United Nations has elaborated an international binding instrument to regulate their activities but the opposition of the U.S., U.K., and (...) other Western governments?and from PMSCs, which prefer self-regulation?have prevented any advancement. (shrink)

Si prescindiéramos de la composición acto-potencial entre «essentia» y «esse» en la línea del ente creado, necesariamente nos veríamos arrojados al monismo spinozista, esto es, a admitir que solamente hay una substancia (a) única, (b) infinita, (c) increada, (d) necesariamente existente, (e) acto puro, (f) identificada, en último término, con la misma substancia de Dios. En el capítulo LII del segundo libro de la Summa contra gentiles, Santo Tomás obtiene esos atributos divinos a partir de siete argumentos que tienen como (...) objetivo probar que, en el caso que no se aceptara la diferencia real entre essentia y esse en el ente finito —tanto material como inmaterial—, necesariamente deberíamos reconocer que sólo hay una substancia con los seis atributos anteriormente mencionados (cada argumento da lugar a un atributo distinto, exceptuando los dos primeros que desembocan en el mismo, a saber, el de la unicidad). En el artículo presente, siguiendo la interpretación de Norberto del Prado, nos proponemos exponer cómo puede refutarse el monismo spinozista desde la doctrina de Santo Tomás en dos etapas: la primera viene representada por el ya citado capítulo de la Summa contra gentes; la segunda, por la cuarta vía (Summa Theologiae, I, q.2, a.3). (shrink)

The article presents the results of an investigation about Africa should be one of the political, economic and social priorities for Europe because of its strategic location, its high birth rate and its natural wealth, but the reality we are faced with is very different. Spain as the border of North Africa and due to its position as the southern border of the European Union is not only a destination country for significant non-EU migratory flows, but also a country of (...) transit of emigrants to other European Community States, being one of the great challenges that you have to face. Our country, through its cooperation policies by both the Head of State and the government, have had and have the primary objective of strengthening its diplomatic, political and business presence and contributing to its economic transformation and political development. (shrink)

The Blackwell Guide to Feminist Philosophy is a definitive introduction to the field, consisting of 15 newly-contributed essays that apply philosophical methods and approaches to feminist concerns. Offers a key view of the project of centering women’s experience. Includes topics such as feminism and pragmatism, lesbian philosophy, feminist epistemology, and women in the history of philosophy.

This anthology provides the definitive theoretical sources of contemporary thinking about identity, including explorations of race, class, gender, and nationality. Explores the long and rich tradition of philosophical analysis and debate over the genesis, contours, and political effects of identity categories. Provides the definitive theoretical sources and contemporary debates by leading theorists such as selections from Hegel, Marx, Freud, DuBois, Beauvoir, Lukács, Fanon, Hall, Guha, Hobsbawm, Wittig, Butler, Halperin, R. Robertson, Said, and LaClau. Combines general and specific analyses of particular (...) identity categories: race/ethnicity, gender/sexuality, class, nationality. Allows for a comparative study of identities through multiple theoretical frameworks. (shrink)