Bidirectional Mediating Role of Loneliness in the Association Between Shyness and Generalized Pathological Internet Use in Chinese University Students: A Longitudinal Cross-Lagged Analysis

Abstract

This 1-year longitudinal study examined the bidirectional mediating role of loneliness in the association between shyness and generalized pathological Internet use (GPIU) in a sample of 291 Chinese university students (143 men, mean age =?19.07?years). A fully cross-lagged panel design was used in which shyness, loneliness, and GPIU were assessed at 3 time points separated by 6-month intervals (named T1, T2, and T3). The results indicated that relationships among shyness, loneliness, and GPIU were dynamic and bidirectional. Specifically, T1 shyness positively predicted increased T2 loneliness, T2 shyness positively predicted increased T3 loneliness, and T2 loneliness positively predicted increased T3 shyness. Additionally, T1 GPIU positively predicted increased T2 loneliness, T2 GPIU positively predicted increased T3 loneliness, and T2 loneliness positively predicted increased T3 GPIU. Loneliness was found to play a bidirectional mediating role in the association between shyness and GPIU. Specifically, T1 shyness and T3 GPIU were mediated through increased loneliness at T2, and T1 GPIU and T3 shyness were mediated through increased loneliness at T2. Furthermore, relationships among shyness, loneliness, and GPIU were the same across the 2 groups, with the strength of relationships being stronger for men.     

Exposure to violence reduces empathetic responses to other’s pain

Past researches showed that empathy for pain not only triggers a resonance mechanism between other and self, but also is modulated by contextual factors. Using functional magnetic resonance imaging, the present study demonstrated that short-term media violence exposure reduced both pain ratings and also the activation of anterior insula and anterior mid-cingulate cortex to other’s pain. Thus, violence exposure modulated empathic responses to other’s pain based on a physiological desensitization.     

Morphological study of micropits formed by anodic etching of an Al-Pd-Mn icosahedral quasicrystal

Faceted micropits obtained by electrochemical etching of a single quasicrystal of an Al-Pd-Mn icosahedral phase have been examined by optical and electron microscopy. Anodic etching of the flat surface of a fivefold plane in a solution composed of CH₃OH and HNO₃(3:1 in volume ratio) reveals a variety of icosahedrally faceted micropits which originated from pre-existing microvoids and etch pits of pentagonal pyramid shape due to the other origins, probably structural defects inside the specimen. As the dissolution progresses, the micropits make successive changes in their shapes, ending in pentagonal pyramids before they vanish.     

生存加工的编码和提取双重优势效应:ERP证据

生存加工比控制条件有更好的记忆表现,产生稳定的记忆优势,这就是记忆生存优势.已有研究多采用行为学实验验证了此现象的存在,但没有确定该优势发生在记忆的何种阶段.本研究采用ERP技术和“间接学习-再认”实验范式,比较被试在生存情境、迁徙情境和愉悦判断中对词汇编码和提取过程的记忆加工,结果发现:在500-700ms时间段,生存情境的相继记忆效应显著大于迁徙情境和愉悦判断:在400-600ms时间段,生存情境的新旧效应显著大于迁徙情境和愉悦判断.表明生存加工具有编码和提取双重优势.     

融合反应时的多级评分IRT模型开发及其应用研究

当前大多数融合反应时的IRT模型仅适用于0-1评分数据资料,极大的限制了IRT反应时模型在实际中的应用。本文在传统的二级计分反应时IRT模型基础上,拟开发一种多级评分反应时模型。在层次建模框架下,分别采用拓广分部评分模型(GPCM)和对数正态模型构建融合反应时的多级评分IRT模型(本文记为JRT-GPCM),并采用全息贝叶斯MCMC算法实现新模型的参数估计。为验证新开发的JRT-GPCM模型的可行性及其在实践中的应用,本文开展了两项研究:研究1为模拟实验研究,研究2为新模型在大五人格-神经质分量表中的应用。研究1结果表明,JRT-GPCM模型的估计精度较高,且具有较好的稳健性。研究2表明,被试的潜在特质与作答速度具有一定的正相关,且本研究结果支持Ferrando和Lorenzo-Seva(2007)提出的“距离-困难度假设”,即当被试的潜在特质与项目的难度阈限距离越远,那么被试会花费更多的时间对项目进行作答。总之,本研究为拓展反应时信息在心理测量及教育中的应用提供新的方法支持。     

高中生创造性思维发展特点的研究

选取110名高中生为被试,采用自编“中学生创造性思维测验”,考察了高中生创造性思维水平的年龄特点、性别差异以及学科成绩与创造性思维水平之间的相关.结果表明:(1)从创造性思维总分上看,高中生的创造性思维水平发展比较平缓,各年级间差异不显著;其中创造性思维最重要的品质——独特性:从高一到高二年级处于较为平稳的水平,二者无显著差异;高三比高二(P<001)和高一(P<0001)有显著提高;(2)高中学生的创造性思维不存在显著的性别差异;(3)中学生语文成绩与创造性思维总得分及部分项目得分有一定相关,与创造性思维的独特性及各项目上的独特性均无显著相关.数学成绩与创造性思维的诸方面均无显著相关.     

风险偏好预测中的性别差异和框架效应

11 8名大学生被试在得益和损失两种任务框架下对自己、其他男性和女性的风险偏好进行了预测。结果发现 ,被试在损失框架下对各类对象风险偏好的预测均高于得益框架 ,且都高估了男性的风险偏好 ,低估了女性的风险偏好。在损失框架下 ,女性被试对各类对象的风险偏好预测高于男性的预测。研究认为 ,性别原型知识、任务框架和即时情绪共同影响被试的风险偏好预测。     

当代情绪发展理论述评

本文从情绪的定义、情绪发展的实质、情绪在个体发展中的作用等方面,评述了当代比较有影响的情绪发展理论不同的情绪发展观。这些情绪发展理论有生物观点、机能主义观点、认知观点、组织观点和社会文化观点。     

再认中意识和无意识的贡献大小--兼论内隐记忆的抗老化现象

本研究以探索记忆中意识和无意识贡献大小为目的,采用年龄和材料两个自变量,年龄分中青年和老年两组,被试均为23人,材料分文字和非文字两种。实验通过PDP的包含和排除测验计算意识和无意识的贡献大小。结果发现：(1)意识在不同年龄和不同材料的记忆中所起作用的差异极为显著;(2)无意识在文字材料的记忆中所起作用的差异极为显著;(3)无意识在非文字材料和不同年龄的记忆中所起的作用的差异均不显著。由此推论,老年人记忆中无意识贡献并未下降。这似说明,老年人内隐记忆并未老化。     

儿童攻击和自我感知的关系

使用基于多水平分析技术的元分析方法对有关儿童攻击和自我感知相关的研究结果进行分析,并对计算结果用模拟方法进行模拟。结果显示现有研究中攻击和自感认知能力之间的相关为-0．01,攻击和自我总体感知间地相关为-0．08,相关结果为低度负相关但达到显性水平,攻击和自感社交能力之间的相关关系不显,模拟结果与此类似。现有关于儿童攻击和自我感知关系的研究数量还偏少。