Caffeine modulates attention network function

The present work investigated the effects of caffeine (0 mg, 100 mg, 200 mg, 400 mg) on a flanker task designed to test Posner’s three visual attention network functions: alerting, orienting, and executive control [Posner, M. I. (2004). Cognitive neuroscience of attention. New York, NY: Guilford Press]. In a placebo-controlled, double-blind study using a repeated-measures design, we found that the effects of caffeine on visual attention vary as a function of dose and the attention network under examination. Caffeine improved alerting and executive control function in a dose–response manner, asymptoting at 200 mg; this effect is congruent with caffeine’s adenosine-mediated effects on dopamine-rich areas of brain, and the involvement of these areas in alerting and the executive control of visual attention. Higher doses of caffeine also led to a marginally less efficient allocation of visual attention towards cued regions during task performance (i.e., orienting). Taken together, results of this study demonstrate that caffeine has differential effects on visual attention networks as a function of dose, and such effects have implications for hypothesized interactions of caffeine, adenosine and dopamine in brain areas mediating visual attention.     

Acute caffeine consumption enhances the executive control of visual attention in habitual consumers

Recent work suggests that a dose of 200–400 mg caffeine can enhance both vigilance and the executive control of visual attention in individuals with low caffeine consumption profiles. The present study seeks to determine whether individuals with relatively high caffeine consumption profiles would show similar advantages. To this end, we examined the effects of four caffeine doses (0 mg, 100 mg, 200 mg, 400 mg) on low- and high-level visual attention in individuals with high consumption profiles (n = 36), in a double-blind study using a repeated measures design. Results from the Attention Network Test indicated that caffeine enhanced both vigilance and the executive control of visual attention, but only at the highest administered dose (400 mg). We demonstrate that in habitual consumers high doses of caffeine can produce beneficial changes in visual attention. These results carry implications for the theorized interactions between caffeine, adenosine and dopamine in brain regions mediating visual attention.     

Group‐based evaluations for pupil‐on‐teacher violence: The impact of teacher intervention strategy

Although extreme violence to teachers is rare, the fact remains that in the UK, 29% of teachers report having been physically assaulted by a pupil (ATL, 2008a ). The ways in which responsibility for such assaults are attributed can have legal, educational and managerial implications. In the current study, teachers (N = 66), pupils (N = 68) and parents (N = 64) from a large secondary school in the UK read an incident report form outlining an incident depicting a pupil physically assaulting a teacher. The incident report was manipulated such that, prior to being assaulted, the teacher had either separated the assailant pupil from another pupil using a physical or non‐physical intervention. Results revealed that participating parents' and teachers' evaluations of the assailant's parents and the teacher differed from those of pupils in several ways. The results are discussed in terms of group‐based responsibility for deviant behaviour and implications for teacher behaviour in response to pupil on teacher violence. Copyright © 2010 John Wiley & Sons, Ltd.     

想象未来的认知加工成分及其脑网络

合理预期和想象未来事件或场景, 有利于个体做出适应性反应, 促进生存与发展。近年来, 研究者对想象未来的认知加工成分和神经机制进行了深入探讨, 提出了想象未来的相关概念和理论。我们首先概述了想象未来实验常用的思维采样范式和词语-线索范式, 接着介绍了想象未来的自我参照加工、心理场景构建等认知加工成分。此外, 特别介绍了想象未来的默认网络模型以及与之相关的其他大尺度脑网络, 并进一步提出了想象未来的脑网络研究框架。未来的研究可从想象未来的动态脑网络、复杂脑网络以及与疾病的关系等角度入手, 深入探究想象未来的神经机制。     

Never quite good enough: The paradox of sticky developmental relationships for elite university graduates

Drawing on the mentoring, education, and social psychology literatures, this longitudinal study examines how the persistence of developmental relationships from an elite graduate school influences subjective career outcomes during early career. Participants (n = 136) were surveyed about their developmental networks—a group of individuals who take an active interest in and action to advance a focal individual’s career—and subjective career outcomes over the 10 years (1996-2006) post graduation. Results show that although receiving mentoring from one’s entire developmental network was positively related to career-related self-efficacy and perceptions of career success, this was not the case for ties retained from graduate school. Continuing to receive mentoring support from developers from graduate school and further, from peers from graduate school, was negatively related to perceptions of career success. These findings offer insight into the dynamics and potentially negative consequences of developmental networks and highlight the significance of social comparison during early career.     

Effects of Attention on the Strength of Lexical Influences on Speech Perception: Behavioral Experiments and Computational Mechanisms

The effects of lexical context on phonological processing are pervasive and there have been indications that such effects may be modulated by attention. However, attentional modulation in speech processing is neither well documented nor well understood. Experiment 1 demonstrated attentional modulation of lexical facilitation of speech sound recognition when task and critical stimuli were identical across attention conditions. We propose modulation of lexical activation as a neurophysiologically plausible computational mechanism that can account for this type of modulation. Contrary to the claims of critics, this mechanism can account for attentional modulation without violating the principle of interactive processing. Simulations of the interactive TRACE model extended to include two different ways of modulating lexical activation showed that each can account for attentional modulation of lexical feedback effects. Experiment 2 tested conflicting predictions from the two implementations and provided evidence that is consistent with bias input as the mechanism of attentional control of lexical activation.     

Locus of control and the flow experience: An experimental analysis

The present research addresses the notion that the compatibility of skills and task demands involved in a given activity elicits a flow experience that renders the respective activity rewarding. The study employed an experimental paradigm to document the causal impact of skills–demands compatibility on the emergence of flow and revealed that participants characterized by a strong internal locus of control (LOC) were most sensitive to the manipulation of skills–demands compatibility and experienced flow under conditions of a fit of skills and task demands, whereas individuals with a weak internal LOC did not enter the state of flow. In line with previous findings, this suggests that distinct personality attributes are of critical relevance for the experience of flow to emerge. Copyright © 2008 John Wiley & Sons, Ltd.     

Beijing Calling... Mobile Communication in Contemporary China

Subsequently, with the recent wave of industrialization, China has become the “factory” of the globalized world. The modernization of this country, however, is not confined to the provision of production at a low added value: It also entails technological appropriation and innovation. In particular, China represents the biggest world market for mobile phones and will soon dominate the Internet market. In this country, the total number of mobile and fixed-line subscribers exceeds 750 million, and the total number of Internet users is more than 162 million. The present study focuses on how, after a decade of mobile phone use, the inhabitants of Beijing evaluate the changes in the social and communicative sphere as a result of the introduction of the mobile phone. In this paper, we present some results of a quantitative research, specifically focused on mobile communication. Based on face-to-face questionnaires administered to a convenient sample of 487 respondents, this study addresses the following research questions: After a decade of mobile phone use, how do Chinese people perceive the importance of this device? To what extent do the adoption and use of mobile phones increase or decrease social connectivity in contemporary China? To what extent does the use of mobile phones in everyday life enhance or reduce the communications – do they make you feel closer to or more distant from other people? What are the variables that predict users’ attitudes toward mobile phones in China?     

Social psychology and social networks: Individuals and social systems

Social psychology and social network research are both centrally concerned with human sociality. Despite some historically significant interactions between the two, these areas of investigation have not been usefully deployed together in recent research endeavours. The present paper attempts to bring out some points of both theoretical and methodological contentions, to characterize the gap between them, to traverse briefly the trajectories of their historical development, and to provide some concrete instances of these differences. Intellectual resources available to Asian social psychology are reviewed, which may help bridge the gap between the two areas of research. We conclude by calling for a greater integration of social psychology and social network perspectives in future research.     

对称场景中朝向一致性对内在参照系的影响

采用部分场景再认范式研究了对称场景中物体朝向的一致性对内在参照系建立的影响。被试在实验1中沿对称轴方向学习无朝向物体组成的场景; 实验2中沿对称轴方向学习有朝向物体组成的场景; 实验3中沿对称轴与物体朝向方向学习与实验2相同的场景。结果表明：(1)物体朝向一致性影响了对称场景中内在参照方向的选择; (2)无论是否存在观察视点的干扰, 观察者选择对称轴和物体的一致朝向作为内在参照方向的可能性没有显著差异。