预期错误与急性应激对不同强度恐惧记忆提取消退的影响

在条件性恐惧记忆再巩固模型下, 预期错误被证明是引发记忆不稳定的必要条件, 但其在不同强度恐惧记忆下的作用尚不明确。对于高强度可能导致的提取无效, 缺乏相应的探索以寻找解决办法, 而应激(stress)在其中发挥的作用值得探索。本研究考察人类被试中, 预期错误在不同强度恐惧记忆下的作用, 以及提取之后施加外源性应激对于消退进程的影响。结果发现, 对于较弱的恐惧记忆, 单个预期错误提取后消退可显著抑制恐惧自发恢复; 而对于较强恐惧记忆, 单个预期错误不能提取恐惧记忆进入再巩固, 已消退的记忆还会复发; 且在该种情况下, 如果在提取后施加外源性急性应激, 会进一步增大恐惧恢复。     

风险来源与决策:背信规避现象及人际联结需求的作用

经典的风险决策研究及相关理论模型关注人们如何对以不同概率出现的损益结果进行评价与选择,但很少区分和探究在相同概率和损益值下不同风险来源对决策的影响。事实上,决策情境中的风险既可能源自客观因素,也可能源自人为因素。与相同大小的客观风险相比,人们更规避人为风险,这种现象被称为"背信规避"。本研究采用信任博弈任务,通过最小可接受概率法和决策选择法两种方式探讨风险来源对决策冒险性的影响。结果发现:(1)中国被试存在"背信规避"现象,即对人为风险的规避程度高于客观风险;(2)当恐惧情绪被唤起时,被试对人为风险的规避程度降低,使得背信规避现象消失,甚至出现"反背信规避"倾向;(3)人际联结需求影响背信规避,人为风险下人际联结需求中介了恐惧情绪对决策冒险性的影响。上述结果有助于加深我们对风险来源影响决策的现象及其机制的理解。     

Death anxiety among New Zealanders: the predictive role of gender and marital status

The aim of this cross-sectional study was to investigate attitudes of New Zealanders towards death and dying. We administered an online version of Collett–Lester Fear of Death Scale and Concerns About Dying Instrument subscales to a representative sample of the New Zealand population. In total, 1001 people responded to the survey. Women reported more anxiousness concerning their own death (p?=?.001) and dying at a young age (p?>?.001). Women also showed more agreement towards spiritual aspects of dying (p?>?.001). Single female respondents worry more about dying (p =?.02) especially when young (p?=?.003). Single participants (p >?.001) aged 18 and 29 (p?>?.001) reported higher anxiety for Items relating to the death of others especially concerning never being able to communicate with the person again. Our findings show that marital status and gender strongly predict higher levels of death anxiety among New Zealanders. This is probably due to the cultural identity of those sampled.     

预期错误在复合恐惧记忆提取消退中的作用

基于记忆再巩固理论的提取消退范式被证明是一种有效和颇有前景的消除不良记忆的方法。本研究将预期错误(Prediction Error, PE)应用于提取消退范式中, 采用多感官复合刺激模型(声音 + 图片)作为条件刺激, 以皮电反应作为恐惧反应指标, 考察在提取阶段不同的预期错误设置(无PE、单个负性PE、单个正性PE和多重PE)对条件性恐惧记忆提取消退效果有何差异。结果表明：无PE组和多重PE组出现了恐惧的自发恢复和重建效应, 而负性PE组和正性PE组均没有出现恐惧的自发恢复和重建效应。说明了在对复合恐惧记忆进行提取消退时, 提取阶段适当的PE才能使记忆进入再巩固过程, 随后传统消退达到抑制恐惧返回效果, 提取阶段没有PE或PE量过多都不能达到恐惧消退效果。     

睡眠对恐惧学习的影响及其认知神经机制

睡眠问题可能会诱发恐惧相关情绪障碍(焦虑、创伤性应激障碍、恐怖症等),研究睡眠影响恐惧学习的认知神经机制,有助于增强对恐惧相关情绪障碍的预测、诊断和治疗。以往研究表明睡眠剥夺影响恐惧习得和消退主要是通过抑制vmPFC活动,阻碍其与杏仁核的功能连接,从而导致恐惧习得增强或是消退学习受损。进一步研究发现睡眠不同阶段对恐惧学习相关脑区有独特的影响:剥夺(缺乏)快速眼动睡眠会抑制vmPFC活动、增强杏仁核、海马激活,导致恐惧习得增强,消退学习受损,此外边缘皮层的功能连接减少破坏了记忆巩固(恐惧记忆和消退记忆);而慢波睡眠主要与海马变化有关,慢波睡眠期间进行目标记忆重激活可促进恐惧消退学习。未来研究需要增加睡眠影响恐惧泛化的神经机制研究、及昼夜节律中断对恐惧消退的影响,以及关注动物睡眠研究向人类睡眠研究转化中存在的问题。     

Cognitive Bias for Pictorial and Linguistic Threat Cues in Children

The present study was designed to test the conditions under which threat-related cognitive bias can be observed in anxious children. Measures of cognitive bias for threatening words and pictures were obtained from spider fearful children (N = 55) and non-fearful children (N = 58) aged 8–11 in the first experiment, and from spider fearful children (N = 44), and two control groups (N = 41; N = 36) aged 8 in the second experiment. Cognitive bias was assessed by the emotional Stroop task. In line with our previous findings, all children aged 8 showed a bias for spider words, but not for spider pictures. However, a relation between spider fear and bias was observed when age was taken into account: bias for spider words decreased with age in the non-fearful children whereas this bias maintained in the fearful group. This differential age effect too replicated earlier findings (Kindt, Bierman, & Brosschot, 1997). It is suggested that a bias for threat words is a normal characteristic in children aged 8. During development, normal children learn to inhibit this processing bias, whilst fearful children fail to learn this ability.     

卵巢激素影响女性恐惧情绪加工的神经机制

大脑结构和功能的性别差异导致恐惧情绪加工的两性差别。女性对恐惧情绪加工受到体内雌激素和孕激素浓度的影响。近年来, 人类脑成像技术、遗传学和分子生物学的综合研究发现了卵巢激素影响女性恐惧情绪加工的神经机制。其中, 雌激素水平升高导致杏仁核活动增强, 使女性对恐惧面孔识别的准确性增加, 而孕激素水平则相反。这与女性在月经周期不同阶段对社会交往的需求和妊娠期间的自我保护机制有关。     

Fear and avoidance of driving among drivers involved in a road traffic crash. The role of traumatic fear and driving cognitions

Fear and avoidance of driving are possible consequences of involvement in road traffic crashes (RTCs). Few studies have assessed the factors associated with fear and avoidance of driving after an RTC. The aim of this present study is to investigate the relations among trauma appraisals of fear, negative driving cognitions, fear and avoidance of driving in a sample of people who experienced vehicle crashes. Further, the mediating role of negative driving cognitions in the relation between trauma appraisals, fear of driving and avoidance of driving was assessed. The sample was comprised of 116 drivers who had been involved in an RTC in the past two years. Negative driving cognitions positively predicted fear of driving and avoidance of driving. Moreover, negative driving cognitions mediated the relation among trauma appraisals of fear with fear of driving and avoidance of driving. The theoretical and practical implications of these results are discussed.     

错失恐惧与社交网站成瘾：有调节的中介模型

为探讨错失恐惧、自我损耗及关系型自我构念对社交网站成瘾的影响及作用机制,本研究基于有限自制力模型,采用问卷法调查了526名微信朋友圈或QQ空间的大学生用户。结果发现：（1）在控制性别的条件下,错失恐惧能显著正向预测社交网站成瘾;（2）错失恐惧还通过自我损耗的中介作用间接预测社交网站成瘾;（3）关系型自我构念调节错失恐惧通过自我损耗预测社交网站成瘾的前半路径。具体来说,相比于低关系型自我构念个体,高关系型自我构念个体的错失恐惧更多地通过自我损耗影响其社交网站成瘾。     

The role of fantasies and dreams in the TV viewing—aggression relationship

The TV viewing habits of 391 8-year-old and 10-year-old Finnish children were related to their aggression, their aggressive and fear fantasies, and their dreams and fantasies about TV. Two measurements of aggression were made: peer-nominated aggression and self-rated aggression. TV viewing habits were measured by the amount of TV seen during a week and violence viewing, that is, how regularly violent TV serials were watched. Hypothetically, in addition to a direct relationship between TV viewing and aggression, there could also be an indirect relationship; for example, fantasizing might provide a link in the TV viewing-aggression relationship. There were significant positive correlations for the boys between TV viewing variables and aggression. There were also significant positive correlations between the amount of TV and televised violence viewing and fear and aggressive fantasies in general and with dreams and fantasies about actual TV programs seen. The correlations were less frequent for the girls. The same tendencies were evident for age groups and education. More frequent positive correlations were found with older children and regular classes than with younger children and music classes. The use of fantasy was also correlated positively with both peer-nominated and self-rated aggression. The results of the present study support the information-processing theory, which suggests that the more a child watches TV the more he or she has fantasies about the programs and rehearses the scenes viewed which, in turn, results in explicit aggressive behavior.