La falacia de la validación personal: Más efectos placebo

RESUMEN

En este artículo se pone a prueba la influencia de efectos placebo en la aceptación de informes evaluativos y diagnósticos por los sujetos. Tras introducir brevemente el tema y plantear las hipótesis, los autores describen el método y los resultados de su investigación. En la discusión explican que estos resultados sugieren que la aceptación del diagnóstico que ofrece un profesional es un fenómeno general independiente de las características personales de los individuos que lo reciben, poniendo en entredicho el fenómeno de la validación personal y, al mismo tiempo, interactúa con determinadas características profesionales de los sujetos, ligadas a imágenes de personalidad a las que son más propensos. Los autores también analizan una limitación importante de su trabajo, el tamaño reducido de la muestra, y finalizan destacando que es el contenido del informe, más que el tipo de pruebas o profesionales, lo que parece afectar diferencialmente a distintos grupos profesionales.     

Nature over nurture: temperament, personality, and life span development

Temperaments are often regarded as biologically based psychological tendencies with intrinsic paths of development. It is argued that this definition applies to the personality traits of the five-factor model. Evidence for the endogenous nature of traits is summarized from studies of behavior genetics, parent-child relations, personality structure, animal personality, and the longitudinal stability of individual differences. New evidence for intrinsic maturation is offered from analyses of NEO Five-Factor Inventory scores for men and women age 14 and over in German, British, Spanish, Czech, and Turkish samples (N = 5,085). These data support strong conceptual links to child temperament despite modest empirical associations. The intrinsic maturation of personality is complemented by the culturally conditioned development of characteristic adaptations that express personality; interventions in human development are best addressed to these.     

Desensibilización sistemática,inoculación de estrés y terapia inespecífica en el tratamiento de la ansiedad a las matemáticas

RESUMEN

Las autoras comienzan ofreciendo una panorámica general de las investigaciones sobre el síndrome de fobia a las matemáticas y la ansiedad ante los exámenes, explicando a continuación que el objetivo general de su estudio es desarrollar procedimientos de modificación de conducta que ayuden a estudiantes de Psicología, con una historia previa de conductas de evitación a los exámenes, a enfrentarse a las pruebas de psicología matemática. Más específicamente, se quiere comparar la eficacia de la Desensibilización Sistemática tradicional con un paquete cognitivo complejo desarrollada por ellas siguiendo el modelo de Inoculación de Estrés, y el valor de estas dos intervenciones específicas se compara, a su vez, con un grupo de terapia no orientado al problema. Tras describir el método y resultados, las autoras destacan en la discusión la eficacia de las tres intervenciones y el hecho de que se lograse afectar al rendimiento y no sólo a la ansiedad en matemáticas. Finalmente afirman que sus resultados apoyan la actualidad de la obra de Frank (1973, 1982), quien señala que una parte muy importante de los efectos psicoterapéuticos se debe a factores comunes a todas las terapias, en los que habitualmente no recae el peso explicativo.     

The effects of counting blessings on subjective well-being: a gratitude intervention in a Spanish sample

This study examined a gratitude intervention repeating Emmons and McCullough study (2003) in a Spanish sample, Participants were randomly assigned to one of three conditions (gratitude, hassles and any event) and kept daily records during 2 weeks of gratitude, affect, quality of relationships, physical and subjective well-being. We added design features to assess the intervention long-term impact (follow-up measures), and to improve the design control (pre-treatment measures). Following the cited authors' analysis, i.e., comparing groups only in the post-test, we replicated their results, finding differences in positive affect and gratitude between the gratitude condition and the hassles condition. However, when including both the pre and the follow-up measures in the analysis, results were replicated only partially, as the difference in gratitude disappeared. Moreover, the difference in positive affect between groups in the post-test seemed to be influenced mainly by a decrease in positive affect in the hassles group. Post-test differences between groups in positive affect disappeared in the follow-up. Gratitude interventions may have an effect on well-being, but we consider other methods to promote gratitude besides gratitude journals should be tested.     

Prediction of differences in Rorschach protocols from the Personality Assessment System

The Personality Assessment System (PAS) is derived from certain subtest scores on any Wechsler test by rather simple calculations. It purports to measure, among other personality attributes, developmental changes in the Internalized-Externalized (I-E) dimension of personality, which is akin to the Introversion-Extroversion construct reflected by some Rorschach measures. PAS scores from a tightly defined sample of normal adults were contrasted with Experience Balance (EB) and Body-image (B) scores derived from Rorschach protocols by "blind" scorers. Significant relations were found between EB ratios produced via the Exner and Klopfer scoring systems and the primitive (early childhood) I-E scores from the PAS. The B scores produced by the Body Image scoring system were related to the basic (adolescent) I-E PAS scores. Although significant, the PAS-Rorschach correlations were relatively poor, in part because it was difficult to define the center of the internalization-externalization continuum in terms of the Rorschach protocols. It is, nevertheless, provocative that traditional scorings of the Rorschach responses of adults assess differences not only in this personality trait, but also in its development, as determined from scaled scores on Wechsler subtests.     

Topological interlocking of protective tiles for the space shuttle

We propose a new concept of design of heat- and impact-resistant tile covering for space shuttles based upon topological interlocking of tiles. The key features of this type of tiling are as follows: firstly, the tiles are kept in place by virtue of the geometry of their contacting surfaces alone, so that no binding agent needs to be used; secondly, failure of an individual element does not compromise the structural integrity of the tile assembly and, moreover, a failed tile will be kept in place by its neighbours, thus maintaining its thermal protection function; thirdly, topological interlocking removes the need for connectors or other stress concentrators deleterious in extreme conditions of space flight and re-entry. Topological interlocking is scale and material independent, which permits combining tiles made from different materials in any proportion.     

Los efectos placebo en la psicología experimental y clínica

RESUMEN

Este trabajo comienza planteando que el término “placebo” se ha convertido en un cajón de sastre en el que los autores engloban diferentes, y a menudo opuestas y dispares, concepciones. Después de destacar la atención creciente a los efectos placebo en la psicología actual y la tendencia a la convergencia entre distintos enfoques en psicoterapia, la autora aborda las divergencias y dificultades para definir placebo aludiendo a concepciones de diferentes autores y centrándose en el planteamiento de Grünbaum (1985). Avia coincide con Brody (1985) en que el problema de nuestro desconocimiento sobre qué sea placebo afecta, recíprocamente, a nuestra falta de conocimiento sobre lo que debe considerarse terapia, ofreciendo algunas reflexiones en torno a posibles explicaciones de este fenómeno y destacando la débil frontera que separa éstas de las explicaciones sobre ciertas variables cognitivas. La autora concluye la presentación de este dossier afirmando que será a partir de la elaboración teórica y el trabajo de investigación como podremos profundizar en el conocimiento del fenómeno placebo.     

Uncertainty and risk during the COVID-19 pandemic: A latent profile analysis

In the present study, we examine how subgroups of people are characterized by different profiles of uncertainty surrounding COVID-19, susceptibility, and recovery. Participants (N = 199) were U.S. residents recruited online for a longitudinal study during the summer of 2020. We first, identified groups using latent profile analysis (LPA) and then examined whether these profiles predicted differences in COVID-related risky and preventative behaviors. LPA identified five distinct profiles of people representing a combination of low and high uncertainty and low, moderate, and high risk perceptions. Results revealed that latent-profile group membership predicted intention to interact with others outside of the household, intention to engage in non-essential shopping, intention to attend an in-person religious gathering, intention to wear a mask in public, and self-reported physical distancing in the past week. Profile membership did not predict intentions to: dine out, go to the nail/hair salon, go to the gym, nor physically distance from others in the future, nor did it predict handwashing in the past week.