Individual differences in the Behavioral Inhibition System are associated with orbitofrontal cortex and precuneus gray matter volume

The Behavioral Inhibition System (BIS) is described in Gray's Reinforcement Sensitivity Theory as a hypothetical construct that mediates anxiety in animals and humans. The neuroanatomical correlates of this system are not fully clear, although they are known to involve the amygdala, the septohippocampal system, and the prefrontal cortex. Previous neuroimaging research has related individual differences in BIS with regional volume and functional variations in the prefrontal cortex, amygdala, and hippocampal formation. The aim of the present work was to study BIS-related individual differences and their relationship with brain regional volume. BIS sensitivity was assessed through the BIS/BAS questionnaire in a sample of male participants (N = 114), and the scores were correlated with brain regional volume in a voxel-based morphometry analysis. The results show a negative correlation between the BIS and the volume of the right and medial orbitofrontal cortices and the precuneus. Our results and previous findings suggest that individual differences in anxiety-related personality traits and their related psychopathology may be associated with reduced brain volume in certain structures relating to emotional control (i.e., the orbitofrontal cortex) and self-consciousness (i.e., the precuneus), as shown by our results.     

The relationship of clinical, cognitive and social measures in schizophrenia: a preliminary finding combining measures in probands and relatives

This study examines performance of schizophrenia patients, unaffected relatives and controls in social cognition, cognitive and psychiatric scales looking for possible markers of vulnerability in schizophrenia. Performance of schizophrenia patients from multiplex families, first-degree relatives, and matched controls was compared and, subsequently, discriminant analysis method was used for identifying the best predictors for group membership. By using Multigroup Discriminant Analyses on the three groups, the best predictors were PANSS, Premorbid Adjustment Scale, Faux Pas test, and a face/emotion categorizing task. This model obtained 82% correct global classification, suggesting that the combination of psychiatric scales and neuropsychological/social cognition tasks are the best approach for characterizing this disease. Although preliminary, our results suggest that social cognition tasks are robust markers of schizophrenia family impairments, and that combining clinical, social and neuropsychological measures is the best approach to asses patients and relatives vulnerability.     

Behavioural factors underlying innovative problem-solving differences in an avian predator from two contrasting habitats

Animal Cognition - Innovative behavior is considered one of the main factors facilitating the adaptation of animals to urban life. However, the relationship between urbanization and innovativeness...     

Behavioral and Emotional Problems on the Teacher’s Report Form: A Cross-National,Cross-Clinic Comparative Analysis of Gender Dysphoric Children and Adolescents

For gender dysphoric children and adolescents, the school environment may be challenging due to peer social ostracism and rejection. To date, information on the psychological functioning and the quality of peer relations in gender dysphoric children and adolescents has been studied via parental report, peer sociometric methods, and social interactions in laboratory play groups. The present study was the first cross-national investigation that assessed behavior and emotional problems and the quality of peer relations, both measured by the Teacher’s Report Form (TRF), in a sample of 728 gender dysphoric patients (554 children, 174 adolescents), who were referred to specialized gender identity clinics in the Netherlands and Canada. The gender dysphoric adolescents had significantly more teacher-reported emotional and behavioral problems than the gender dysphoric children. In both countries, gender dysphoric natal boys had poorer peer relations and more internalizing than externalizing problems compared to the gender dysphoric natal girls. Furthermore, there were significant between-clinic differences: both the children and the adolescents from Canada had more emotional and behavioral problems and a poorer quality of peer relations than the children and adolescents from the Netherlands. In conclusion, gender dysphoric children and adolescents showed the same pattern of emotional and behavioral problems in both countries. The extent of behavior and emotional problems was, however, higher in Canada than in the Netherlands, which appeared, in part, an effect of a poorer quality of peer relations. Per Bronfenbrenner’s (American Psychologist, 32, 513–531, 1977) ecological model of human development and well-being, we consider various interpretations of the cross-national, cross-clinic differences on TRF behavior problems at the level of the family, the peer group, and the culture at large.     

Harms and deprivation of benefits for nonhuman primates in research

The risks of harm to nonhuman primates, and the absence of benefits for them, are critically important to decisions about nonhuman primate research. Current guidelines for review and practice tend to be permissive for nonhuman primate research as long as minimal welfare requirements are fulfilled and human medical advances are anticipated. This situation is substantially different from human research, in which risks of harms to the individual subject are typically reduced to the extent feasible. A risk threshold is needed for the justification of research on nonhuman primates, comparable to the way risk thresholds are set for vulnerable human subjects who cannot provide informed consent. Much of the laboratory research conducted today has inadequate standards, leading to common physical, psychological, and social harms.     

Entrevista con Alan Baddeley

RESUMEN

Tras presentar a este profesor inglés -director de la Applied Psychology Unit- como uno de los investigadores más importantes en psicología cognitiva, la entrevista se centra en la denominada “memoria operativa” o “memoria de trabajo” (working memory) y alguna de sus implicaciones. En primer lugar el autor nos habla de sus estudios sobre el desarrollo de la lectura, afirmando que se puede caracterizar el retraso en el lenguaje como un déficit en la memoria operativa. Seguidamente trata el tema del aprendizaje humano desde la perspectiva de la psicología cognitiva, así como la relación entre su enfoque y el de los procesos automáticos y controlados de Shiffrin y Schneider o el de asignación de recursos de procesamiento de Navon y Gopher. Esta entrevista finaliza analizando las relaciones entre aprendizaje y memoria operativa.     

El segundo sistema de funciones como marco definitorio de la escala psicológica

RESUMEN

El presente trabajo es de naturaleza filosófica y no psicológico-científico y apenas se habla del procesamiento de información. Los intereses de este artículo son de naturaleza filosófica muy general y, por descontado, de filosofía de la ciencia o epistemología, y en particular de epistemología de la psicología. Se intenta esbozar aquí algunas reflexiones epistemológicas conducentes a esclarecer ciertas características, a juicio del autor, esenciales del campo de la psicología científica, precisamente como un campo ya dado a la reflexión epistemológica. Estas reflexiones son de carácter general, aunque puedan parecer alejadas de muchos problemas específicos de los psicólogos actuales, lo cierto es que sólo en el contexto de tales problemas puede ser contrastado el valor que las ideas presentadas puedan tener. El presente trabaja comienza con un extenso desarrollo que pone en tela de juicio el concepto kuhniano de paradigma, así como el uso que de él viene haciéndose en gran parte de la comunidad psicológica misma, para seguir planteando después otra serie de reflexiones sobre la epistemología de la psicología.     

An Enlightened Revolt: on the Philosophy of Nicholas Maxwell

This paper is a reaction to the book “Science and the Pursuit of Wisdom”, whose central concern is the philosophy of Nicholas Maxwell. I distinguish and discuss three concerns in Maxwell’s philosophy. The first is his critique of standard empiricism (SE) in the philosophy of science, the second his defense of aim-oriented rationality (AOR), and the third his philosophy of mind. I point at some problematic aspects of Maxwell’s rebuttal of SE and of his philosophy of mind and argue in favor of AOR.     

Semantic Processing of Foveally and Parafoveally Presented Words in a Lexical Decision Task

Using a lexical decision task in which two primes appeared simultaneously in the visual field for 150 msec followed by a target word, two experiments examined semantic priming from attended and unattended primes as a function of both the separation between the primes in the visual field and the prime-target stimulus-onset asynchrony (SOA). In the first experiment significant priming effects were found for both the attended and unattended prime words, though the effect was much greater for the attended words. In addition, and also for both attention conditions, priming showed a tendency to increase with increasing eccentricity (2.3°, 3.3°, and 4.3°) between the prime words in the visual field at the long (550 and 850 msec) but not at the short (250 msec) prime-target SOA. In the second experiment the prime stimuli were either two words (W-W) or one word and five Xs (W-X). We manipulated the degree of eccentricity (2° and 3.6°) between the prime stimuli and used a prime-target SOA of 850 msec. Again significant priming was found for both the attended and unattended words but only the W-W condition showed a decrement in priming as a function of the separation between the primes; this decrement came to produce negative priming for the unattended word at the narrow (2°) separation. These results are discussed in relation to the semantic processing of parafoveal words and the inhibitory effects of focused attention.