经济不平等对阶层流动感知的影响及其机制

经济不平等是影响阶层流动感知的重要因素。研究发现,经济不平等可能抑制、也可能提升阶层流动感知。在梳理两者之间复杂关系的基础上,本文提出了经济不平等影响阶层流动感知的作用机制模型。经济不平等可能通过影响不同的心理过程,继而对阶层流动感知产生抑制或提升作用;此外,两者关系也会受到微观个体因素和宏观社会因素的调节,从而呈现出不同的关系模式。未来研究应进一步考察和完善经济不平等影响阶层流动感知的整合模型。     

公安民警的创伤后应激症状对执行功能的影响—基于Stroop范式的探究

公安民警常常身临应激和危险情境中,是创伤事件的易感人群,但其创伤后应激症状对执行功能的影响研究尚且缺乏。已有研究发现,具有创伤后应激症状的个体的执行功能存在缺陷,表现在对冲突信息的抑制能力受损以及对创伤相关信息的注意偏向和情绪唤起。本研究以公安民警为实验组被试,据其创伤后应激症状分为高低两组,在校大学生为对照组被试,采用Stroop范式探究创伤后应激症状对公安民警“冷”、“热”执行功能的影响。结果表明,具有创伤后应激症状的公安民警在“冷”、“热”执行功能上不存在缺陷,但仍在一定程度上受到创伤后应激症状的影响。启示对具有创伤后应激症状的公安民警进行干预时,应关注其症状的严重程度,在“热”执行功能上寻求更有效的干预方式。     

再谈十字军东侵

5年前,应《科学与无神论》杂志编辑部之约,我谈了十字军东侵的经过。今天我准备再谈谈它的原因、后果及对后世的深远影响。一、十字军东侵的起因十字军东侵的起因是多方面的,主要有以下几点:一是当时西欧封建主迫切要求新的领地和资源。他们从领地上的剥削所得,已经不能满足自己的欲望,希望得到东方的财富,因而积极支持十字军东侵活动。二是无领地的骑士收入微薄,往往债台高筑,依靠服军役和打劫商旅为生。因此他们把目光投向东方,希冀到那里去发财致富。三是西欧城市商人,特别是意大利的商人,热衷于十字军的东侵。他们为了商业利益,希望夺取…     

How do giant pandas (Ailuropoda melanoleuca) respond to varying properties of enrichments? A comparison of behavioral profiles among five enrichment items

This study investigated the responses of 14 giant pandas (Ailuropoda melanoleuca) to 5 enrichment items (3 manipulable objects, 2 feeding devices) that possess different properties affording varying behavioral opportunities. Enrichment items were quantitatively described by using 12 properties. Pandas displayed no preferences among the 5 enrichment treatments, all of which had similar positive effects on behavioral measures of well-being (behavioral diversity, stereotypy). However, each item promoted a distinct behavioral profile, readily mapped onto the enrichment's properties. These results suggest that it may be important to stimulate behavioral diversity but that specific behaviors or enrichment properties are not required. The unique behavioral topography seen with these enrichments also suggests that providing multiple enrichments with varying properties will maximize overall behavioral diversity.     

Cross- and within-cultural variations in children's understanding of distance, time, and speed interrelationships: a follow-up study

A problem with interpretations of differences in mathematic achievement between students from Asian countries and those from the United States is the seemingly implicit assumption of the cultural homogeneity of Asian societies. Researchers rarely measure the effects of variables within cultures that are hypothesized to be related to differences across cultures. In the present study, the authors examined the effects of socioeconomic status (SES) and quality of instruction on Chinese students' (1st, 3rd, and 5th grades) understanding of distance, time, and speed. The results indicated that (a) low SES in China can impede the development of children's mathematical cognition and (b) higher SES does not guarantee better performance. The implication is that the gap in mathematical performance between socioeconomically advantaged and disadvantaged children can be narrowed or even eliminated through instructional practices that focus on the systematic training of children's mathematical thinking.     

New lessons from knockout mice: The role of serotonin during development and its possible contribution to the origins of neuropsychiatric disorders

Serotonin (5-HT) modulates numerous processes in the central nervous system that are relevant to neuropsychiatric function and dysfunction. It exerts significant effects on anxiety, mood, impulsivity, sleep, ingestive behavior, reward systems, and psychosis. Serotonergic dysfunction has been implicated in several psychiatric conditions but efforts to more clearly understand the mechanisms of this influence have been hampered by the complexity of this system at the receptor level. There are at least 14 distinct receptors that mediate the effects of 5-HT as well as several enzymes that control its synthesis and metabolism. Pharmacologic agents that target specific receptors have provided clues regarding the function of these receptors in the human brain. 5-HT is also an important modulator of neural development and several groups have employed a genetic strategy relevant to behavior. Several inactivation mutations of specific 5-HT receptors have been generated producing interesting behavioral phenotypes related to anxiety, depression, drug abuse, psychosis, and cognition. In many cases, knockout mice have been used to confirm what has already been suspected based on pharmacologic studies. In other instances, mutations have demonstrated new functions of serotonergic genes in development and behavior.     

Relational scaffolding of school motivation: developmental continuities in students' and parents' ratings of the importance of school goals

The authors investigated whether parents and students are consistent, over grade levels, in the importance they assign to school goals. Elementary and high school students (n = 178) and their parents (n = 130) completed a questionnaire addressing the personal importance of students' school goals, defined in terms of school success. Parent-child consistencies in the rating patterns of school goals over grade levels were more common than were inconsistencies. These developmental consistencies support the position that students' school goals are embedded within the parent-child relationship (J. Youniss, 1980; J. Youniss & J. Smollar, 1985) and are scaffolded within it (J. S. Bruner, 1975; L. S. Vygotsky, 1978). Potential sources of relational and phenotypic influences on school goals are discussed, as is the need for effective friendship management and school performance in high school.     

Beyond the Obvious: Chronic Vividness of Imagery and the Use of Information in Decision Making

The authors investigate two competing hypotheses about how chronic vividness of imagery interacts with the vividness and salience of information in decision making. Results from four studies, covering a variety of decision domains, indicate that chronic imagery vividness rarely amplifies the effects of vivid and salient information. Imagery vividness may, in fact, attenuate the effects of vivid and salient information. This is because, relative to nonvivid imagers, vivid imagers rely less on information that appears obvious and rely more on information that seems less obvious. This tendency is so robust that vividness of imagery may amplify the effects of vivid information only when this information is the only information available in the decision field. The findings seem to reflect vivid imagers' tendency to totally immerse themselves in a decision problem and scrutinize the available information creatively.     

从中德儿童技术创造性跨文化研究结果看性别差异

研究者通过对中德儿童技术创造性跨文化研究结果的综合分析,着重讨论了在差异心理学领域一直十分受人关注的性别差异问题。结果发现,无论是中国儿童还是德国儿童,无论是超常儿童还是常态儿童,性别差异具有基本稳定的趋势,而且,在不同的方面具有不完全一致的表现形式。具体表现为：（１）在数字、图形和实用创造性思维方面,在中国和德国儿童中都没有发现创造性思维方面的性别差异;（２）在心理折叠、学习爱好、技术问题理解和     

Color filling-in under steady fixation: behavioral demonstration in monkeys and humans

Color filling-in is a phenomenon in which the color of an object appears to be filled-in by the color of the surrounding field. We have studied the question of whether monkeys perceive color filling-in with near-foveal stimuli under steady fixation. Two monkeys were trained to fixate steadily and to attend to a disk, surrounded by an annulus of the complementary color, in parafoveal vision. Using displays in which the color of the disk was gradually changed to that of the annulus, we trained the animals to signal when they perceived a uniform color field. During the experiment, we introduced a small percentage of trials in which the disk color remained constant, and looked for 'filling-in' responses in these trials. Three human subjects were also tested for comparison. All subjects produced 'filling-in' responses with frequencies that were significantly higher for static disks with blurred borders than for moving disks or disks with sharp borders. This indicates that the monkeys' responses reflected perceptual filling-in, rather than random behavior. The time course of filling-in was similar in monkeys and humans. For the blurred static disks, responses occurred first after 3-4 s of fixation, reaching a probability of 0.2-0.8 by the end of 6 s, depending on the subject.