Sistemas expertos y psicología cognitiva: una visión general

Resumen

El presente trabajo intenta ofrecer una visión sintética del tema de los sistemas expertos que trata de hacer hincapié en aquellos aspectos de este campo que pudieran resultar más relevantes para el psicólogo interesado en la cognición. Se traza un breve esbozo del marco científico-técnico de la inteligencia artificial en general, a partir del cual se intenta caracterizar a los sistemas expertos desde dos puntos de vista principales: en primer lugar, el tipo de problemas y tareas a los que se destinan dichos sistemas y, en segundo lugar, la estructura computacional subyacente que ha permitido abordarlos con éxito. Se discute la relación histórico-científica entre la inteligencia artificial y la psicología cognitiva, observándose que se ha producido un flujo constante y bidireccional de conceptos teóricos, métodos y problemas conceptuales de una a otra, especialmente en el actual marco interdisciplinar de la ciencia cognitiva. Dado este contexto, se argumenta que es muy posible que los sistemas expertos aporten novedades conceptuales y metodológicas significativas para la Psicología. Por último, se especula sobre algunas cuestiones en las que podría tener lugar tal contribución.     

Hacia una estructuración teórica de la Psicología Diferencial

RESUMEN

Los autores enmarcan en sus coordenadas temporales y teóricas la obra de Royce y Powell, analizando en profundidad sus implicaciones. Consideran que el análisis estadístico multivariado, especialmente factorial, que la psicología diferencial ha adoptado desde hace algunos años resulta particularmente adecuado a la hora de desglosar inductivamente los contenidos y datos de la realidad. Sugieren que Royce y Powell presentan la esencia del nuevo enfoque, recogiendo aportaciones de la Teoría de la Información y de la Teoría General de Sistemas. Destacan, entre otras cuestiones, que la Teoría multifactorial-sistemática incluya el concepto de tipo, enfatice tanto las derivaciones cognitivas como afectivas y posibilite una evaluación comprehensiva de la persona en función de los perfiles en cada uno de los subsistemas. Sin embargo, encuentran susceptible de discusión el recurrir a un modelo jerárquico para estructurar el supra-sistema (la personalidad) y cada sub-sistema. Los autores consideran que la psicología diferencial, a través de estructuraciones como la de Royce y Powell, muestra que la validez ecológica nunca ha estado al margen de sus objetivos y presupuestos, y terminan afirmando que esta disciplina sintoniza con los nuevos paradigmas en psicología fiel a sus métodos y herramientas, pero abierta a desafíos tanto teóricos como empíricos.     

Revisión del constructo lugar de control a partir de sus instrumentos de evaluación sobre poblaciones infantiles

Resumen

Se realiza una revisión de las principales escalas de evaluación de las Expectativas de Lugar de Control existentes para niños y adolescentes, tanto en lo concerniente a sus características formales como a su fiabilidad y validez de constructo. El objetivo doble que se persigue reside, en primer lugar, en ofrecer una información que permita al lector escoger la escala más apropiada en función de los intereses que persiga. En segundo lugar, analizar el constructo a partir del cumplimiento de las predicciones realizadas por los autores de las mismas. Se discuten, al final, los hallazgos revisados en el contexto de la teoría del Aprendizaje Social y de la naturaleza y capacidad predictiva del constructo.     

Subclinical social anxiety and academic performance in adolescence: analysis of theoretical and practical implications / Ansiedad social subclínica y rendimiento académico en la adolescencia: análisis de sus implicaciones teórico-prácticas

Abstract

This study analyses the relationship between self-reported social anxiety and academic performance in a sample of 1,616 Spanish students (52.1% males) in compulsory secondary education, aged 12 to 16 years old. Social anxiety was assessed by the Social Phobia and Anxiety Inventory (SPAI) and academic performance was measured with school grades and failing grades. Results reveal that adolescents with social anxiety show a similar academic performance to adolescents without social anxiety. Although t tests found some significant differences in academic grades and number of failing grades, the effect size analysis showed that these differences had no empirical relevance. These findings are discussed considering the gender and grade levels and their theoretical and practical implication.     

Priming the trait category “hostility”: The moderating role of trait anxiety

Recent studies on affective priming with the naming task have revealed an influence of trait anxiety on the direction of affective priming effects (e.g., Berner & Maier, 2004 Berner, M. P. and Maier, M. A. 2004. The direction of affective priming as a function of trait anxiety when naming target words with regular and irregular pronunciation. Experimental Psychology, 51: 180–190. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). This moderating role of trait anxiety was further investigated in a study employing a conceptual priming task. After masked presentation of either hostile or neutral primes, participants performed a person judgment task. As expected, the direction of the hostility rating difference score, defined as the difference between hostility ratings of a target person in the hostility priming condition and in the neutral priming condition, changed from positive to negative with increasing levels of self-reported trait anxiety. The findings are interpreted in terms of salience-dependent overcorrection processes (Glaser & Banaji, 1999 Glaser, J. and Banaji, M. R. 1999. When fair is foul and foul is fair: Reverse priming in automatic evaluation. Journal of Personality and Social Psychology, 77: 669–687. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Implications for our understanding of the cognitive functioning in high trait anxiety are discussed.     

Weibull analysis of the biaxial fracture strength of a cast p-type LAST-T thermoelectric material

This is the first study applying Weibull statistics to the strength distribution of a thermoelectric (TE) material and to determine the fracture strength of a member of the LAST-T (lead–antimony–silver–tellurium–tin) family of high-temperature TE compounds. The p-type TE material Ag_0.9Pb₉Sn₉Sb_0.6Te₂₀ was cast from the melt and specimens cut from the resulting ingot were fractured in a ball-on-ring biaxial fracture test. The Weibull parameters (characteristic strength and Weibull modulus) were obtained from the fracture data. Implications of the Weibull analysis on the fabrication of TE devices are discussed.     

Entitlement to Self‐Knowledge and Brute Error

Abstract

I discuss Burge’s argument that our entitlement to self‐knowledge consists in the constitutive relation between the second‐order review of thoughts and the thoughts reviewed, and defend it against Peacocke’s criticism. I then argue that though our entitlement to self‐knowledge is neutral to different environments, as Burge claims, the consideration of Burge’s own notion of brute error shows that Burge’s effort to reconcile externalism and self‐knowledge is not successful.     

Virtual Reality Based Treatments in Eating Disorders and Obesity: A Review

Since the late 1990s the use of virtual reality (VR) has expanded in the field of mental disorders. During this time, several VR-based applications have been developed for the treatment of eating disorders (ED) and obesity. Both these pathologies involve disturbances related to eating behavior, weight, and body image. Although effective and well-established protocols are now available for the treatment of ED and obesity, relapses are frequent and a proportion of patients do not improve after intervention. In this context, VR has been shown to be a useful technology for enhancing traditional cognitive-oriented therapies. The main objective of this review was therefore to examine the evidence regarding the efficacy of VR-based treatments as a component of therapeutic interventions for ED and obesity. To this end, three databases (PsycInfo, Medline, and PsycArticles) were searched for the period 1986–2012. Only research articles and case studies were selected. Although several methodological deficiencies were detected in the reviewed studies, there is fair evidence for the effectiveness of VR-based treatments in ED and obesity. VR-based interventions usually combine exposure to VR environments with cognitive therapies. The VR component seems to be especially suitable for reducing body image disturbances, such as body image dissatisfaction, and for increasing self-esteem and self-efficacy. The rationale for the use of VR in these areas is also presented and discussed.     

Kinesthetic Aftereffects and Individual Differences in Carryover effects

There is disagreement among researchers about the distinction between dynamic and static spatial performance. Given that dynamic spatial performance is supposed to be important for some occupations, such as air traffic control (ATC), it is germane to have evidence about the likelihood of that distinction. In the present study, a battery of printed static spatial and reasoning tests were applied to 480 applicants for an ATC training course. Two dynamic spatial tests were also applied. Confirmatory factor analyses were performed for testing three models. In Model A, static and dynamic spatial tests were grouped, whereas in Model B, spatial tests were separated according to their static or dynamic character, and in Model C, spatial tests were segregated according to the construct they tapped (visualization or spatial relations). The authors found that Model B, which distinguished static and dynamic spatial tests, showed the best fit. They also discuss some implications of the findings.