Sustained vs. transient cognitive control: Evidence of a behavioral dissociation

This study assessed whether two well known effects associated with cognitive control, conflict adaptation (the Gratton effect) and conflict context (proportion congruent effects), reflect a single common or separate control systems. To test this we examined if these two effects generalized from one kind of conflict to another by using a combined-conflict paradigm (involving the Simon and Spatial Stroop tasks) and manipulating the proportion of congruent to incongruent trials for one conflict (Simon) but not the other (Spatial Stroop). We found that conflict adaptation effects did not generalize, but the effect of conflict context did. This contrasting pattern of results strongly suggests the existence of two separate attentional control systems, one transient and responsible of online regulation of performance (conflict adaptation), the other sustained and responsible for conflict context effects.     

Deweyan Multicultural Democracy,Rortian Solidarity,and the Popular Arts: Krumping into Presence

Curiously, while the efficacy of the arts for the development of multicultural understandings has long been theorized, empirical studies of this effect have been lacking. This essay recounts our combined empirical and philosophical study of this issue. We explicate the philosophical considerations that shaped the development of the arts course we studied, which was grounded in rather traditional humanist educational thought, informed by Deweyan considerations for pedagogy and multiculturalism. We also provide an overview of the course and of the study design: the ways in which the course worked to teach aesthetic theory through a combination of popular and canonical works, and the ways in which it sought to instill a sense of cross-cultural appreciation and solidarity among students through the inclusion of art from different cultures and generations. We then share our research findings and our return to the realm of philosophy to interpret them. Our postcolonial analysis incorporates emerging discussions of the arts as a tool for resistance and dialogue within the system of public education, and revisit and reconsider the very concept of education for pluralistic democracy. This approach problematizes traditional conceptions of pluralism, in which an attempt is made to dissolve difference in a common understanding, and instead advocates that works from among the contemporary popular arts and works drawn from the artistic “canon” alike must be considered and employed for their instrumental value to the educational process—especially for their ability to prompt an intersubjectivity that is accompanied by a heightened awareness of difference.     

Structural relaxation and rejuvenation in a metallic glass induced by shot-peening

The metallic glass Pd₄₀Cu₃₀Ni₁₀P₂₀ in as-cast or pre-annealed states was shot-peened successively at room temperature or at 77 K. The structural state of the glass was characterized by the relaxation spectrum measured in a differential scanning calorimeter. Mechanically induced relaxation of the as-cast glass and mechanically induced rejuvenation of pre-annealed samples are both more evident at 77 K than at 298 K, enabling deductions about the underlying mechanisms. The relaxation spectrum of the glass as a function of temperature displays two broad maxima, which occurring at the higher temperature is attributed to the part of the free-volume distribution associated with flow defects. In samples shot-peened at 77 K, the stored energy after deformation can be as high as 20% of the cold work. Shot-peening simultaneously generates flow defects within shear bands and destroys them in the matrix between bands: whose effect dominates is principally dependent on the initial state of relaxation of the glass. Shot-peening of partially crystallized samples appears capable of breaking up and dispersing crystallites without inducing any further significant crystallization.     

Louis Couturat,modern logic,and the international auxiliary language

ABSTRACT

To some extent, the early twentieth century revival of universal languages was the work of logicians and mathematicians. Pioneers of modern logic such as Frege, Russell and Peano wanted to overcome the diversity and deficiencies of natural languages. Through the rigour of formal logic, they aimed at providing scientific thinking with a reliable medium free from the ambiguity and inconsistencies of ordinary language. This article shows some interconnections between modern logic and the search for a common tongue that would unite scientists and people of all nations. The French mathematician and philosopher Louis Couturat is a key figure in understanding the interplay between these two movements. Through his work in composing the Ido language as an alternative to Esperanto, Couturat gave a new life to the Leibnizian idea of a universal characteristics. In addition, his multifaceted work provides a valuable insight into some political implications of early analytic philosophy.     

The Many Senses of Imagination and the Manifestation of Fiction: A View from Husserl’s Phenomenology of Phantasy

The systematic importance of the eidetic account of phantasy for Husserlian phenomenology in general is undisputed, but whether this account can be relevant for Aesthetics has often been put into question. In this paper I argue that Husserl’s rich phenomenology of phantasy, and in particular his account of perceptual phantasy, can nevertheless significantly enhance our understanding of how we recognize and imaginatively participate in artistic fictions. Moreover, I show how Husserl’s peculiar formulation of a non-intuitive phantasy at stake in artistic representation anticipates some uses of the imagination in Aesthetics suggested by Ernst Gombrich and Kendall Walton.     

Individual differences in willingness to become an organ donor: A decision tree approach to reasoned action

The promotion of organ donation requires a better understanding of the attributes associated with willingness to donate. This entails revealing complex interactions among personality attributes related to intentions and behaviors. In the present study, survey data from young adults (N = 367) were analyzed using decision tree algorithms to identify these interactions within the reasoned action framework. Within this structure, donation attitudes, intentions, and behaviors were examined in relation to individual differences such as conscientiousness, empathy, time orientation, religiosity, and interpersonal trust.     

Entrevista con J. D. Frank

RESUMEN

Jerome Frank, posiblemente el autor más provocativo en la línea de considerar que las psicoterapias pueden ser placebos o que éstos deben considerarse como auténticas terapias, responde en la entrevista a algunas de las cuestiones que su reconocimiento de los factores comunes a todas las terapias han planteado a otros profesionales. Comienza explicando que desde la publicación de Persuasion and Healing se han acumulado más datos a favor de su hipótesis de la desmoralización, e introduce algunas clarificaciones terminológicas en relación con el “efecto placebo”. Seguidamente aborda, entre otras, cuestiones tales como las características que se deben considerar al diseñar un grupo control placebo, cómo deben emplearse éstos en el campo de la psicología clínica o su defensa del terapeuta ecléctico, finalizando con algunos comentarios acerca de la eficacia de varias formas de psicoterapia.     

How Should We Assess the Fit of Rasch-Type Models? Approximating the Power of Goodness-of-Fit Statistics in Categorical Data Analysis

We investigate the performance of three statistics, R ₁, R ₂ (Glas in Psychometrika 53:525–546, 1988), and M ₂ (Maydeu-Olivares & Joe in J. Am. Stat. Assoc. 100:1009–1020, 2005, Psychometrika 71:713–732, 2006) to assess the overall fit of a one-parameter logistic model (1PL) estimated by (marginal) maximum likelihood (ML). R ₁ and R ₂ were specifically designed to target specific assumptions of Rasch models, whereas M ₂ is a general purpose test statistic. We report asymptotic power rates under some interesting violations of model assumptions (different item discrimination, presence of guessing, and multidimensionality) as well as empirical rejection rates for correctly specified models and some misspecified models. All three statistics were found to be more powerful than Pearson’s X ² against two- and three-parameter logistic alternatives (2PL and 3PL), and against multidimensional 1PL models. The results suggest that there is no clear advantage in using goodness-of-fit statistics specifically designed for Rasch-type models to test these models when marginal ML estimation is used.