ResumenSe presenta una propuesta metodológica desde la perspectiva de la Neurociencia Social, utilizando la actividad electrodérmica (EDA) Electrodermal signal using Sociograph: Methodology to measure group activity Abstract A Social Neuroscience approach is adopted to present a methodology proposal using electrodermal activity (EDA) as a somatic marker in order to measure group behaviour. Sociograph is an unobtrusive instrument providing technological innovation, which allows researchers to study and measure the group's attentional and emotional behaviour during its activity. The biopsychosocial model, basis of neuroscience, requires adequate methodological instrumentation for its conceptualization and analysis. Sociograph allows the recording of attentional (EDLg) and emotional (EDRg) levels of activation through a somatic indicator (EDA), applied to the group activity (EDAg). With Sociograph it is possible to carry out continuous real-time and digitized format monitoring of psychophysiological registry of group activity during the interaction, interdependence and

The influence of conventional tillage (CT) and reduced tillage (RT) on leaching of clopyralid (3,6‐dichloropyridine‐2‐carboxylic acid) and metamitron (4‐amino‐4,5‐dihydro‐3‐methyl‐6‐phenyl‐1,2,4‐triazin‐5‐one) was monitored in a laboratory experiment with undisturbed soil columns from two plots where CT or RT practices have been used. Herbicides were applied at the rate of 5 kg ha−1 to duplicate water‐saturated columns that were leached with 600, 1200, or 1800 mL or 4000 mL of water. Clopyralid leaches more rapidly than metamitron due to its lower sorption. Higher amounts of clopyralid were detected in leachates from RT columns than in leachates from CT columns. Breakthrough of clopyralid occurred earlier in RT columns due to preferential flow, although the total amounts leached (78%) were lower than in CT columns (94%). Residual clopyralid in soil was only slightly lower in RT than in CT. Metamitron rendered similar BTCs in RT and CT although the total recovery in leachates were higher in CT columns (10%) than in RT columns (5%). Metamitron residues in soil were much lower in RT than in CT columns. Additional experiments with handpacked soil columns showed no differences in RT and CT for clopyralid, but higher leaching of metamitron in CT (16%) than in RT (8%). The lower recoveries (soil residue and leachates) observed for both herbicides under RT has been attributed to more rapid degradation in this system. These differences were much more pronounced for metamitron due to higher sorption and degradability in soil.

Se constata la existencia de racismo aversivo (Gaertner y Dovidio, 1986) hacia los inmigrantes en nuestro entorno social y se trata de identificar algunas características diferenciales en comparación con los estudios realizados en el contexto norteamericano. Se utilizan las escalas de Pettigrew y Meertens (1995) para distinguir entre sujetos igualitarios y prejuiciosos, y, posteriormente, se sitúa a los sujetos en una situación experimental de jurado simulado virtual. Se utiliza un diseño factorial 2x3x3 (etnia del acusado, tipo de pruebas y composición-veredicto del jurado). Los resultados indican que el racismo aversivo, característico de sujetos igualitarios, sólo se manifiesta en situaciones donde la estructura normativa es ambigua y/o existen argumentos para racionalizar sus respuestas prejuiciosas. Su mayor tiempo de respuesta en tomar decisiones hacia los inmigrantes, especialmente cuando éstas son negativas, parece reflejar su resistencia a ser considerados racistas. Las pruebas inculpatorias y exculpatorias influyen en el veredicto de manera diferente según la etnia del acusado. En el caso del inmigrante, las pruebas que le perjudican se tienen en cuenta y las que le benefician no. Ocurre lo contrario cuando se trata de un miembro del endogrupo.