The contrasting effects of negative word of mouth in the post-consumption stage

We explore the effects of negative word of mouth (NWOM) from worse-off or similar others in the post-consumption stage. In four experiments, we show that the ramifications of NWOM are more complex than portrayed in the literature. Specifically, we demonstrate that attribute-based NWOM has a negative (i.e., aggravating) effect on dissatisfied consumers, whereas experience-based NWOM has a positive (i.e., alleviating) effect. Thought-listing data reveal distinct processes underlying the contrasting effects. On one hand, these results are consistent with the predictions of attitude polarization and downward comparison research. On the other hand, they are explainable in terms of the disconfirmation model.     

Odor preference learning and memory modify GluA1 phosphorylation and GluA1 distribution in the neonate rat olfactory bulb: testing the AMPA receptor hypothesis in an appetitive learning model

An increase in synaptic AMPA receptors is hypothesized to mediate learning and memory. AMPA receptor increases have been reported in aversive learning models, although it is not clear if they are seen with memory maintenance. Here we examine AMPA receptor changes in a cAMP/PKA/CREB-dependent appetitive learning model: odor preference learning in the neonate rat. Rat pups were given a single pairing of peppermint and 2 mg/kg isoproterenol, which produces a 24-h, but not a 48-h, peppermint preference in the 7-d-old rat pup. GluA1 PKA-dependent phosphorylation peaked 10 min after the 10-min training trial and returned to baseline within 90 min. At 24 h, GluA1 subunits did not change overall but were significantly increased in synaptoneurosomes, consistent with increased membrane insertion. Immunohistochemistry revealed a significant increase in GluA1 subunits in olfactory bulb glomeruli, the targets of olfactory nerve axons. Glomerular increases were seen at 3 and 24 h after odor exposure in trained pups, but not in control pups. GluA1 increases were not seen as early as 10 min after training and were no longer observed 48 h after training when odor preference is no longer expressed behaviorally. Thus, the pattern of increased GluA1 membrane expression closely follows the memory timeline. Further, blocking GluA1 insertion using an interference peptide derived from the carboxyl tail of the GluA1 subunit inhibited 24 h odor preference memory providing causative support for our hypothesis. PKA-mediated GluA1 phosphorylation and later GluA1 insertion could, conjointly, provide increased AMPA function to support both short-term and long-term appetitive memory.     

论北周时期的民间佛教组织及其造像

北周时期的民间佛教信仰十分盛行.通过对遗存的造像记分析,当时以邑和邑义为名称的民闻佛教造像组织十分发达,其内部构成反映了当时社会的阶层结构,规模也与地域性基层村社有关.这些组织主要以造像为目的,兼顾修建寺院、建义井、栽树等.从造像题材看,北周民众的信奉对象以释迦最多,其次是观世音,与北齐民众信仰有明显不同,反映了二者文化和地域性的差异.     

Evaluating the performance of different procedures for constructing confidence intervals for coefficient alpha: A simulation study

Reliability is one of the most important aspects of testing in educational and psychological measurement. The construction of confidence intervals for reliability coefficients has important implications for evaluating the accuracy of the sample estimate of reliability and for comparing different tests, scoring rubrics, or training procedures for raters or observers. The present simulation study evaluated and compared various parametric and non-parametric methods for constructing confidence intervals of coefficient alpha. Six factors were manipulated: number of items, number of subjects, population coefficient alpha, deviation from essentially parallel condition, item response distribution and type. The coverage and width of different confidence intervals were compared across simulation conditions.     

用于情绪障碍研究的面部表情系统的初步建立

目的:建立一套情绪障碍研究用面部表情图片系统,为异常情绪的研究提供标准化刺激材料,增加情绪障碍研究的取材范围。方法:对85名被试拍摄喜悦、惊奇、轻蔑、厌恶、愤怒、恐惧、悲伤、平静、兴趣、羞愧、痛苦11种面部表情图片,拍摄强度分为强、中、弱三个等级,经过两次筛选,再由40名评定者对其进行类别、强度、愉悦度和优势度的判定。结果:获得一系列具有代表性的不同等级强度的8种面部表情图片520张,其中喜悦167张、惊奇78张、轻蔑67张、厌恶29张、愤怒46张、恐惧19张、悲伤65张、平静49张,每张图片都有其相应的一致率、强度、愉悦度和优势度分数。结论:面部表情图片系统为以后情绪障碍的研究提供了较好的标准化刺激材料;首次提供了轻蔑的表情图片;性别可能影响厌恶、恐惧表情的强度识别。     

网络游戏成瘾者的内隐攻击性研究

本研究通过IAT对网络游戏成瘾者的内隐攻击性进行了研究。研究表明:(1)与非网络游戏成瘾者相比,网络游戏成瘾者持有自我攻击性信念和对攻击性的更为积极的内隐态度;(2)网络游戏成瘾者与非网络游戏成瘾者在外显攻击性上没有表现出显著差异。     

人格维度与行为抑制的相关研究

本研究旨在探讨人格特点与行为抑制之间的关系。680名被试完成了中国人人格量表(QZPS)和行为抑制量表(BIS),回归和相关分析的结果表明,对七种行为的抑制都与多个人格因素显著相关,相关系数在0.10-0.57之间。控制人格因素间的相关之后,进入每个预测行为抑制回归方程的人格因素分别为6-10个,能够解释17%-51%的变异。文中还对本研究的局限及进一步研究的方向进行了讨论。     

三种攻角误差符的比较研究

本实验是通过计算机系统、平视显示器系统及歼-5模拟驾驶舱实现的。攻角误差符及背景画面都逼真地模拟了平视显示的动态情景。通过对被试者信号响应能力的测定,从中优选出较理想的显示方式。此外,在实验的基础上,又对飞行部队进行了调查,并取得了相似的结果。     

先述参与者的优势及句子不同成分的可提取性

考察了复合句中先述参与者在可提取性上的优势及句子连贯性因素对这种优势现象的影响。同时,采用系列一同时呈现的方式,考察了句子不同成分的可提取性。     

工作记忆,意思相对频率与汉语歧义句的加工

本研究选取高、低工作记忆能量两组被试,通过两个实验,考察了歧义句多种解释的相对使用频率和被试工作记忆能量在歧义句加工中的作用。结果表明：（１）意思相对频率在歧义句加工中有显著效应,主要意思比次要意思更易于提取;（２）工作记忆能量对歧义句的加工仅表现出一定程度的影响,材料难度增加时,该效应达到边缘性显著的水平。