受欺负与青少年外化问题关系的“健康环境悖论”：敌意性归因的中介作用

“健康环境悖论”是指在总体受欺负水平较低的环境中, 受欺负的个体会表现出更多适应问题。本研究以来自47个班级的1764名5年级到8年级学生为被试(男生956人, 平均年龄14.46岁), 考察了班级平均受欺负水平在个体受欺负经历与外化问题间的调节作用及敌意性归因的中介作用。结果发现：(1)受欺负与外化问题的关系存在“健康环境悖论”现象, 即班级平均受欺负水平能调节个体受欺负经历与外化问题的关系, 在班级平均受欺负水平较低的班级中受欺负经历与外化问题的关联更强; (2)班级平均受欺负水平对受欺负与外化问题的调节作用通过敌意性归因的中介作用实现。本研究证实了受欺负与外化问题的健康环境悖论现象, 并首次揭示了敌意性归因的中介作用机制。     

班级环境如何影响受欺负者的适应？健康环境悖论及其发生机制

“健康环境悖论”是指在受欺负水平相对较低的环境中,受欺负个体有更多的适应问题。通过梳理相关实证研究,本文从人际与认知两大方面分析健康环境悖论的发生机制。人际机制强调健康环境会影响同伴群体对于受欺负者的态度和受欺负者的友谊,这些不良的人际关系进一步加剧受欺负者的适应困难。认知机制认为健康环境会通过向上的社会比较和消极归因方式,影响受欺负者的适应问题。最后,我们讨论了中国文化背景下“健康环境悖论”的适用性问题、未来研究的发展方向和对于干预实践的建议。     

Bilateral Transcranial Direct Stimulation Over the Primary Motor Cortex Alters Motor Modularity of Multiple Muscles

Abstract

Transcranial direct current stimulation (tDCS) over the primary motor cortex (M1) has been demonstrated to modulate the motor performance of both healthy individuals and patients with neuromuscular disorders. However, the effect of tDCS on motor control of multiple muscles, which is a prerequisite to change in motor performance, is currently unknown. Using dimensionality reduction analysis, we investigated whether bilateral tDCS over M1 modulates the coordinated activity of 12 muscles. Fifteen healthy men participated in this randomized, double-blind crossover study. Each participant received a 20-min sham and 2-mA stimulation bilaterally over M1 (anode on the right M1 and cathode on the left M1), with a minimum washout period of 4?days. Muscle activation and end-point kinematics were evaluated during a task where participants reached out to a marked target with non-dominant hand as fast as possible, before and immediately after tDCS application. We found decreased similarity in motor modularity and significant changes in muscle activation in a specific motor module, particularly when reaching out to a target placed within arm’s length and improved smoothness index of movement only following 2-mA stimulation. These findings indicate that clinicians and researchers need to consider the simultaneous effect of bilateral tDCS over M1 on multiple muscles when they establish tDCS protocol to change in motor performance of patients with neuromuscular deficits.     

左侧眶额皮层在自动情绪调节下注意选择中的作用：来自经颅直流电刺激的证据

前人研究表明自动情绪调节能够自上而下地影响情绪及情绪性注意过程。近来有研究提示自动情绪调节与眶额皮层(orbitofrontal cortex, OFC)有关。也有研究表明左侧OFC的激活影响负性注意偏向。本研究采用经颅直流电刺激技术, 考察阈下启动情绪控制目标条件下, 抑制左侧眶额皮层兴奋性是否影响负性注意偏向。结果发现, 使用阴极刺激抑制左侧OFC活动可以加快被试对与恐惧刺激位置一致的探测点的反应。该结果提示左侧眶额皮层是自动情绪调节下情绪性注意选择相关的重要脑区。     

Le harcèlement : évolution du droit français et problématiques de l’évaluation des victimes

Medical doctors are often asked by patients victim of harassment, or even by the authorities, to establish medical certificate. Harassment is a complex phenomenon, covering a wide range of behaviours occurring in multiple situations. The writing of such a certificate can prove to be difficult, can be a cause of legal proceedings for clinicians, especially at a disciplinary level. Moreover, the evaluation is all the more complex since the qualification of harassment by the judge sometimes requires an evaluation of the impact on the victims under the form of a Total Work Incapacity (TWI) duration, but not under all the circumstances existing in French law. In this article, we first propose to address general consideration towards the writing of the certificate, before doing a systematic review of the successive evolutions of French penal and labour law regarding harassment in its most frequent forms. Finally, we propose to address the matter of victims evaluation, especially towards TWI duration evaluation, which does not seem to us an adapted tool regarding the fact that harassment is usually a chronical and durable phenomenon.     

Subtypes of Victims and Aggressors in Children's Peer Groups

This study reports an investigation of the behavioral profiles and psychosocial adjustment of subgroups of victims and aggressors in elementary school peer groups. Peer nomination scores for aggression and victimization were used to classify 354 inner-city children (mean age of 10.3 years) into one of four subgroups: aggressive victims, nonaggressive victims, nonvictimized aggressors, and normative contrasts. Subgroup comparisons were then conducted using multi-informant assessment of social behavior, social acceptance-rejection, behavioral regulation, academic functioning, and emotional distress. Children in each of the victim-aggressor subgroups were characterized by a degree of social and behavioral maladjustment. However, impairments in behavioral and emotional regulation were most evident for the aggressive victim subgroup. Aggressive victims were also characterized by academic failure, peer rejection, and emotional distress. The results of this investigation highlight the distinctive nature of the aggressive victim subgroup.     

Harcèlement moral au travail et pro/antisocialité du salarié victime : quels effets sur les jugements,les émotions et les intentions d’aide des témoins ?

Bullying at work is characterized by negative, repetitive and frequent acts towards a person, bearing reached with her physical and psychic health (Einarsen, Hoel, Zapf, & Cooper, 2003; Leymann, 1996). On the basis of research of Weiner (1996) and Rudolph, Roesch, Greitemeyer, and Weiner (2004), we postulated that the bullying acts, the behaviors of the bullied employee and it revictimisation would influence the judgments and the emotions of the witnesses. Research was carried out within the framework of the paradigm of the judges of 72 participants. The variance analyses show that the gravity of the acts decreases the feeling of equity, increases the attribution of responsibility towards the harcelor, decreases the attribution of responsibility to the victim and increases the help. The bullying acts always interact with the victim’s pro or antisocial behaviors. The emotions of the judges are mainly positive with regard to the victim and negative towards the harcelor except when bullied employee has emitted an antisocial behavior. The gravity of the bullying acts increases on the one hand sympathy, fear and sadness towards the victims, on the other hand, anger and dislike towards the harcelor.     

Cross-contextual stability of bullying victimization: a person-oriented analysis of cyber and traditional bullying experiences among adolescents

Using a person-oriented approach the study examined whether bullying victimization at school continued into cyberspace victimization in a large sample of high school students in Lithuania (N = 1667, 58% girls), age 15-19 (M = 17.29, SD = 0.95). Three forms of traditional bullying (verbal, physical and relational) and seven forms of cyberbullying victimization through cell phones and computers were included in the analysis. The findings revealed that 35% of traditional bullying victims were also bullied in cyberspace. In particular, adolescents who experienced predominantly verbal and relational bullying at school, showed a higher risk of victimization in cyberspace a year later, while this was not observed for predominantly physical forms of traditional bullying. The findings point to the importance of a cross-contextual perspective in studies on stability of bullying victimization.