移动支付对大学生冲动性消费行为的影响——来自ERP的实验证据

为寻找移动支付影响冲动性消费的电生理证据,实验采用两难选择的虚拟购物任务,通过2(支付方式)×2(产品类型)被试内实验设计,结合ERP技术比较移动支付和现金支付下的冲动消费及相关电生理指标。实验数据显示:(1)移动支付下参与者的购买意愿高于现金条件;(2)对享乐品的购买,移动支付下的购买意愿、购买率高于现金支付,而对实用品两种支付下无差异;(3)决策阶段头皮左侧发现,移动支付下享乐品的LPP波幅正于实用品,而现金支付下二者LPP波幅无差异;(4)N2波幅上存在Buy/No Buy效应。结果表明:移动支付促进了享乐品的冲动性消费,决策阶段左侧脑区的LPP波幅可作为其电生理指标,N2波幅表征买与不买。     

Within‐person Relationship between Creative Self‐efficacy and Individual Creativity: The Mediator of Creative Process Engagement and the Moderator of Regulatory Focus

Integrating the dynamic self‐regulatory framework with the motivational self‐regulation perspective, we theorize and test how and when creative self‐efficacy increases individual creativity at the within‐person level. Conceptualizing creative process engagement as a self‐regulation effort, we theorize that creative process engagement mediates the within‐person effect of creative self‐efficacy on individual creativity. We further explore how creative self‐efficacy and chronic regulatory focus interact to affect the within‐person mediating effect. A sample of 145 R&D workers provided two monthly reports for their creative activities and experiences over 8 months. The findings provide empirical support for the hypothesized mediating mechanism. At the within‐person level, creative process engagement mediates the relationship between creative self‐efficacy and individual creativity. The results also show that chronic regulatory focus moderated the mediated relationship. Specifically, creative self‐efficacy is positively related to individual creativity for employees with a strong prevention focus and negatively related to individual creativity for employees with a strong promotion focus.     

Altered behavioral and neural responsiveness to counterfactual gains in the elderly

Counterfactual information processing refers to the consideration of events that did not occur in comparison to those actually experienced, in order to determine optimal actions, and can be formulated as computational learning signals, referred to as fictive prediction errors. Decision making and the neural circuitry for counterfactual processing are altered in healthy elderly adults. This experiment investigated age differences in neural systems for decision making with knowledge of counterfactual outcomes. Two groups of healthy adult participants, young (N = 30; ages 19–30 years) and elderly (N = 19; ages 65–80 years), were scanned with fMRI during 240 trials of a strategic sequential investment task in which a particular strategy of differentially weighting counterfactual gains and losses during valuation is associated with more optimal performance. Elderly participants earned significantly less than young adults, differently weighted counterfactual consequences and exploited task knowledge, and exhibited altered activity in a fronto-striatal circuit while making choices, compared to young adults. The degree to which task knowledge was exploited was positively correlated with modulation of neural activity by expected value in the vmPFC for young adults, but not in the elderly. These findings demonstrate that elderly participants’ poor task performance may be related to different counterfactual processing.     

细胞死亡概念的发展及启示

随着生物医学技术的发展,人们对细胞死亡的研究不断深入,从组织学水平到细胞学水平再深入到分子生物学水平,有关细胞死亡的概念也经历了坏死,凋亡与坏死,胀亡、凋亡与坏死等几个阶段.认识具有反复性和无限性,人们对细胞死亡的认识体现了认识的辨证发展过程,细胞死亡理论的发展会像死亡自身一样不可避免.     

知觉信息先期呈现下两可图的命名和相似判断

在实物图片或轮廓图先期呈现的条件下研究了6岁、9岁、12岁及成人被试对两可图形的命名或相似判断。结果表明：（1）命名项目或相似判断与线索项目有关时,各年龄被试对判断项的命名或相似判断均表现出与线索项目一致的倾向。（2）轮廓图作为线索项目时．命名或相似判断反应时较长;实物作为线索项目时,命名或相似判断反应时较短。无关项目作为为线索项目时．被试命名或相似判断的反应时居中;命名项目或相似判断项目均与线索项目一致时反应时较短;命名项目或相似判断项目均与线索项目不一致时反应时延长。（3）被试命名或相似判断的反应时随其年龄的增长而下降,6岁和9岁儿童的反应时较长;12岁儿童的反应时较短;成人的反应时最短。     

中学生学习倦怠与人格关系

采用问卷调查法,对1136名高中学生的学习倦怠进行分析,考察了人口学变量之间的差异,并探讨了学习倦怠各因子与人格之间的关系。结果发现:⑴影响学生学习倦怠的人口学变量有家庭所在地、性别、年级和学校类型。其中家庭所在地单独影响学习倦怠,且是学习倦怠的有效预测变量。性别、学校类型和年级相互作用影响学生的学习倦怠。⑵精神质、内外向、神经质与学习倦怠的各个因子及总分有极其显著的相关,其中N、P是学习倦怠有效的预测变量。     

ICU患者外出检查风险分析与对策

为了探讨ICU危重患者外出检查风险的原因,从而降低ICU危重患者外出检查风险,本文通过对312例ICU患者外出检查风险因素进行讨论分析,研究降低风险的对策,即在规范ICU患者外出检查流程、做好检查前准备和注意途中安全及返回后的护理,结果提示285例患者无意外发生,安全返回病房,其余27例患者存在一定风险,但在相应处理措施下均安全返回病房。     

记忆监控的准确性与有效记忆

以大学生为被试,采用2（记忆方式：自我调控、程序预设）×2（测试间隔：5分钟、3天）的混合设计,考察记忆监控的准确性对有效记忆的影响。结果发现：（1）在即时测试中,“自我调控”组的回忆成绩与“程序预设”组之间的差异未达显著水平,但在延时测试中,后者的成绩显著高于前者;（2）“自我调控”条件下被试的学习判断相对准确,未出现高估;（3）“自我调控”未导致记忆的有效保持,可能是由于被试低估了程序预设那些可暂时提取的词对的作用。     

慢性束缚应激对大鼠脑内Fas、FasL含量的影响

为探讨慢性束缚应激对大鼠脑内不同部位Fas/FasL系统表达的不同影响。将24只雄性SD大鼠随机分为束缚应激组、装置对照组和正常对照组（n=8）。分别对三组大鼠给予相应的干预14天,用Western-blotting方法测定应激后大鼠大脑前脑皮质、内嗅皮质以及海马区域Fas、FasL蛋白含量。结果表明,应激后各脑区三组大鼠Fas含量差异具有统计学意义（p < 0.01）,束缚应激组明显高于正常对照组或装置对照组（p < 0.01）。在海马区域,三组大鼠FasL含量差异具有统计学意义（p < 0.01）,束缚应激组大鼠FasL蛋白水平显著高于正常对照组或装置对照组(p < 0.01)。三组大鼠自身大脑前脑皮质、内嗅皮质以及海马Fas含量的差异比较均无统计学意义( p > 0.05) 。束缚应激组大鼠海马的FasL含量高于前脑皮质和内嗅皮质(p < 0.05);正常对照组或装置对照组自身不同脑区间FasL含量的变化无统计学意义。提示慢性束缚应激能诱导大鼠脑内Fas/FasL系统表达水平的改变,对不同的脑区,其影响程度明显不同     

小概率权重问题及其市场应用

探讨了决策制定中有关“小概率权重”的理论问题和市场应用问题。若干实验结果表明概率的权重大小不是绝对的,而是背景依赖的,在决策问题中价值对比降低或不存在时,小概率事件权重不太可能被高估。然而,对小概率的权重也会因决策人所处的目前状况有关,个体在财富状况等方面的差异会对小概率事件的赋权产生影响。实验结果还证明有关小概率权重问题的理论发现对彩票价格制定、保险费用确定以及选择有效的有奖促销策略具有重要的启示