Emergent Power Hierarchies and Group Performance

In newly formed groups, informal hierarchies emerge automatically and readily. In this study, we argue that emergent group hierarchies enhance group performance (Hypothesis 1) and we assume that the more the power hierarchy within a group corresponds to the task‐competence differences of the individual group members, the better the group performs (Hypothesis 2). Twelve three‐person groups and 28 four‐person groups were investigated while solving the Winter Survival Task. Results show that emerging power hierarchies positively impact group performance but the alignment between task‐competence and power hierarchy did not affect group performance. Thus, emergent power hierarchies are beneficial for group performance and although they were on average created around individual group members' competence, this correspondence was not a prerequisite for better group performance.     

Neuroethical and Social Implications of Using Transcranial Electrical Stimulation to Augment Creative Cognition

Recent research indicates that transcranial electrical stimulation (tES) of specific brain regions can successfully improve various forms of creative cognition. Although the endeavor to increase human creative capacity is intriguing from a neuroscientific perspective, and of interest to the general public, it raises numerous neuroethico-legal and social issues (NELSI). This review explores these issues by considering (a) whether using brain stimulation to improve creative cognition qualifies as a ‘treatment’ or an ‘enhancement,’ (b) how direct-to-consumer (DTC) and do-it-yourself (DIY) use of tES should be regarded and regulated, and (c) what the developing landscape of creativity-related neurostimulation could (and should) become.     

Infrahumanization or familiarity? Attribution of uniquely human emotions to the self, the ingroup, and the outgroup

People attribute more secondary emotions to their ingroup than to outgroups. This effect is interpreted in terms of infrahumanization theory. Familiarity also could explain this differential attribution because secondary emotions are thought to be less visible and intense than primary ones. This alternative explanation to infrahumanization was tested in three studies. In Study 1, participants attributed, in a between-participants design, primary and secondary emotions to themselves, to their ingroup, or to an outgroup. In Study 2, participants answered for themselves and their ingroup or for themselves and an outgroup. In Study 3, participants made attributions to the ingroup or a series of outgroups varying in terms of familiarity. The data do not support an explanation in terms of familiarity. The discussion centers on conditions not conducting to infrahumanization.     

Acculturation and mental health status among Hispanics. Convergence and new directions for research

Acculturation, the process whereby immigrants change their behavior and attitudes toward those of the host society, is a fundamental part of migration-induced adaptations to new sociocultural environments. A rapidly expanding research literature on acculturation has accompanied the growth of international migrations. In response to the need to integrate the growing literature on acculturation and mental health status among Hispanics in the United States, and to identify points of convergence and new directions for research, 30 publications were examined. Points of convergence are identified, as are problems and limitations. The research needs new directions, proceeding from but not constricted by the assumptions and procedures in the work already done.     

One-year prediction of cognitive decline following cognitive-stimulation from real-world data

Clinical evidence based on real-world data (RWD) is accumulating exponentially providing larger sample sizes available, which demand novel methods to deal with the enhanced heterogeneity of the data. Here, we used RWD to assess the prediction of cognitive decline in a large heterogeneous sample of participants being enrolled with cognitive stimulation, a phenomenon that is of great interest to clinicians but that is riddled with difficulties and limitations. More precisely, from a multitude of neuropsychological Training Materials (TMs), we asked whether was possible to accurately predict an individual's cognitive decline one year after being tested. In particular, we performed longitudinal modelling of the scores obtained from 215 different tests, grouped into 29 cognitive domains, a total of 124,610 instances from 7902 participants (40% male, 46% female, 14% not indicated), each performing an average of 16 tests. Employing a machine learning approach based on ROC analysis and cross-validation techniques to overcome overfitting, we show that different TMs belonging to several cognitive domains can accurately predict cognitive decline, while other domains perform poorly, suggesting that the ability to predict decline one year later is not specific to any particular domain, but is rather widely distributed across domains. Moreover, when addressing the same problem between individuals with a common diagnosed label, we found that some domains had more accurate classification for conditions such as Parkinson's disease and Down syndrome, whereas they are less accurate for Alzheimer's disease or multiple sclerosis. Future research should combine similar approaches to ours with standard neuropsychological measurements to enhance interpretability and the possibility of generalizing across different cohorts.     

The automaticity of infra‐humanization

This research tested the infra‐humanization hypothesis that uniquely human emotions (e.g., love, sorrow) are automatically more linked in memory with the in‐group than with the out‐group. No such difference is expected for non‐uniquely human emotions (e.g., joy, sadness) which pertain to everybody, including animals. Two studies using semantic primes followed by visual person categorization task (PCT) and lexical (lexical decision task, LDT) targets were conducted. Results supported infra‐humanization theory. Reaction times were faster for the in‐group/secondary emotions associations than for out‐group/secondary emotions ones. As predicted, no difference in latency times appeared for primary emotions as a function of the groups. These findings elucidate the ambiguity present in Paladino et al. ( 2002 ). Theoretical and practical implications are suggested. Copyright © 2006 John Wiley & Sons, Ltd.     

Quantitative depictions of threatening phenomena in news reports. The scary world of frequency data

Two experiments addressed the question of whether news reports depicting base‐rate data indicative of increasing population size over time would assuage the apprehension and victimization risk associated with another news story depicting frequency increases in a threatening phenomenon during the same time period. Men exposed to the population data manifested lower levels of apprehension and victimization risk than men not exposed to such data, but women showed no reduction in either apprehension and victimization risk than men not exposed to such data, but women showed no reduction in either apprehension or victimization risk after exposure to population data. This interaction was replicated in both experiments. Experiment 2 demonstrated that the same interaction can be produced using base‐rate data other than that depicting population increases over time and that the effects of the base‐rate stories are not merely a product of distraction from the threatening story. Differences in apprehension levels, information processing styles, mathematical problems solving skill, and sex role response sets were considered as alternative explanations for the interaction.     

Epitaxial growth of electrodeposited cadmium selenide on (111) gallium arsenide

Epitaxial growth of CdSe has been achieved on (111) GaAs by electrodeposition from an aqueous electrolyte. The structure of the film corresponds to the cubic modification of CdSe. The quality of epitaxy has been investigated by reflection high-energy electron diffraction, transmission electron microscopy and X-ray diffraction techniques.     

Emotional prejudice,essentialism, and nationalism The 2002 Tajfel lecture

In explaining differences between groups, people ascribe the human essence to their ingroup and consider outgroups as less human. This phenomenon, called infra‐humanization, occurs outside people's awareness. Because secondary emotions (e.g. love, hope, contempt, resentment) are considered uniquely human emotions, people not only attribute more secondary emotions to their ingroup than to outgroups, but are reluctant to associate these emotions with outgroups. Moreover, people behave less cooperatively (in terms of altruism, imitation, and approach) with an outgroup member who expresses himself through secondary emotions. Infra‐humanization occurs for high and low status groups, even in the absence of conflict between groups. It does not occur when the outgroup target is adequately individualized, by a complete name or through perspective taking, for instance. The differential familiarity with the ingroup and the outgroup cannot explain infra‐humanization. Yet, preliminary results show that subjective essentialism and ingroup identification may mediate the effects of infra‐humanization. A connection is made between nationalism and infra‐humanization. Copyright © 2003 John Wiley & Sons, Ltd.