The rational side of egocentrism in social comparisons

Prior work has found that when people compare themselves with others they egocentrically focus on their own strengths and achievements more than on the (equally relevant) strengths and achievements of the comparison group. As a consequence, people tend to overestimate their comparative standing when absolute standing is high and underestimate their comparative standing when absolute standing is low. The present research investigated a rational discounting explanation of this bias—namely, that people weight the target of the comparison (the self) more than the referent of the comparison (others) because they typically have more knowledge about the former than the latter. In three studies, we found that the tendency to focus on the target in social comparisons—and the over and underestimation of relative standing that tendency engenders—was reduced (but not eliminated) as people’s knowledge about the comparison group increased. These results suggest that there may be a rational side to egocentrism in social comparisons.     

Dare to compare: Fact-based versus simulation-based comparison in daily life

We examined the relative frequency of social, counterfactual, past-temporal, and future-temporal comparison in daily life using an experience-sampling method, in which participants were randomly prompted to record thought samples using palmtop computers carried for two weeks. Comparative thought accounted for 12% of all thoughts, and all four comparison types occurred with equivalent frequency. Comparisons may be either fact-based (i.e., based on actuality, as in social and past-temporal comparison) or simulation-based (i.e., based on imagination, as in counterfactual and future-temporal comparison). Because the latter are more “unbounded,” and because greater perceived opportunity invites greater self-improvement, we predicted and found that counterfactual and future-temporal comparison were more likely to be upward (vs. downward) than social and past-temporal comparison. All comparison types focused on approach more than avoidance motives, except for counterfactuals, which showed equivalent focus on both. These findings reveal the prominence of comparative thought in daily life, and underscore the value of an integrative theory that describes social, counterfactual, or temporal comparison using a common theoretical platform.     

Reasoning with Slippery Predicates

It is a commonplace that the extensions of most, perhaps all, vague predicates vary with such features as comparison class and paradigm and contrasting cases. My view proposes another, more pervasive contextual parameter. Vague predicates exhibit what I call open texture: in some circumstances, competent speakers can go either way in the borderline region. The shifting extension and anti-extensions of vague predicates are tracked by what David Lewis calls the “conversational score”, and are regulated by what Kit Fine calls penumbral connections, including a principle of tolerance. As I see it, vague predicates are response-dependent, or, better, judgement-dependent, at least in their borderline regions. This raises questions concerning how one reasons with such predicates. In this paper, I present a model theory for vague predicates, so construed. It is based on an overall supervaluationist-style framework, and it invokes analogues of Kripke structures for intuitionistic logic. I argue that the system captures, or at least nicely models, how one ought to reason with the shifting extensions (and anti-extensions) of vague predicates, as borderline cases are called and retracted in the course of a conversation. The model theory is illustrated with a forced march sorites series, and also with a thought experiment in which vague predicates interact with so-called future contingents. I show how to define various connectives and quantifiers in the language of the system, and how to express various penumbral connections and the principle of tolerance. The project fits into one of the topics of this special issue. In the course of reasoning, even with the external context held fixed, it is uncertain what the future extension of the vague predicates will be. Yet we still manage to reason with them. The system is based on that developed, more fully, in my Vagueness in Context, Oxford, Oxford University Press, 2006, but some criticisms and replies to critics are incorporated.     

Subjective relative income and lottery ticket purchases

Despite a return of only $.53 on the dollar, state lotteries are extremely popular, especially among the poor, who play the most but can least afford to play. In two experiments conducted with low‐income participants, we examine how implicit comparisons with other income classes increase low‐income individuals' desire to play the lottery. In Experiment 1, participants were more likely to purchase lottery tickets when they were primed to perceive that their own income was low relative to an implicit standard. In Experiment 2, participants purchased more tickets when they considered situations in which rich people or poor people receive advantages, implicitly highlighting the fact that everyone has an equal chance of winning the lottery. Copyright © 2007 John Wiley & Sons, Ltd.     

比较广告传播的作用机制及影响因素

比较广告是一种新异但颇具争议的广告形式。研究者们对比较广告的概念和传播效果已有较为统一的认识,新近研究的重点是比较广告传播的作用机制及影响其传播效果的因素。文章从比较广告的传播效果、传播机制和影响因素三方面进行了系统的考察,提出现有研究在机制探讨和影响因素控制上的一些不足,并展望了研究亚文化下比较广告的方向     

Effects of Physical Appearance Social Comparisons and Perceived Attainability of an Ideal Body on Body Dissatisfaction and Weight-Management Behaviors Among Young Japanese Women

This study was designed to test a model in which tendencies to engage in physical appearance social comparisons and perceived ideal body attainability interact to predict body dissatisfaction, and are associated with weight-control behaviors (WCBs) as past studies have rarely examined perceived attainability in their analytic models. College women (N = 297) from two universities in Japan completed a paper-and-pencil survey. A path analysis revealed that appearance comparisons were positively associated with body dissatisfaction over and above the effects of body mass index and self-esteem. Body dissatisfaction, in turn, was positively related to low-risk, moderate-risk, and high-risk WCBs. There was a significant interaction effect between appearance comparison and attainability, but the nature of the interaction was the opposite from our expectation: the positive association between appearance comparison and body dissatisfaction was more pronounced among women who reported higher confidence in attaining an ideal body, whereas this association was nonsignificant for those with low confidence in attaining an ideal body. Finally, perceived ideal body attainability was directly and positively related to low-risk and moderate-risk WCBs.     

Arbitrary social comparison,malicious envy,and generosity

Existing work on the effects of social comparison on envy and generosity typically involves manipulation of social comparison with respect to dimensions that carry personal meaning and reflect upon the self, for example, performance, ability, or achievement. In the current work, we examine the effects of social comparison based on a purely arbitrary, manipulated situation. We measure malicious envy via monetary decisions that have real consequences for the target of comparison, in place of a self-reported questionnaire. In addition, we test the effects of the preliminary social comparison on generosity in a subsequent and ostensibly unrelated situation. In Experiment 1 we demonstrate the effect of randomly manipulated upward social comparison on a monetary allocation decision, and we establish the link between this allocation decision and malicious envy. In Experiment 2 we show that upward comparison affects not only malicious envy towards the target of the comparison but also decreases generosity towards a third party in a subsequent, ostensibly unrelated situation. Experiment 3 shows the effect of this type of social comparison, beyond a specific direction, on reducing generosity towards a third party.     

Comparison of advantages and disadvantages among various algorithms in logistics path design—Taking H-group as an example

There are many kinds of VRP problems and there are many ways to solve them. In this paper, we use ant colony algorithm, genetic algorithm, and annealing algorithm to optimize the selection of the logistics path of H-group located at He Nan Province. It establishes an algorithm evaluation system, and analyzes the performance of the three algorithms in six dimensions from qualitative and quantitative perspectives. Through MATLAB data calculation, we found that the ant colony algorithm performs equally well on the solution quality, solution efficiency, code storage, robustness, adaptability, and optimality.     

差距知觉的泛化效应：我和你之间的差距有多大?

当知晓自己和他人的表现,即自己与他人在某方面表现上的差距已经明确时,人们对自我-他人差异的知觉准确吗?本研究发现了差距知觉的泛化效应：人们将自身的绝对表现(自己的表现与零相比的结果)泛化到对自身相对表现(自己与他人相比的结果)的判断上。在7个研究中, 被试(N = 2766)得知自己的绝对表现和相对于他人的表现,并判断自己与他人之间的差距。结果显示,绝对获益时,人们在相对获益时感知到的自我-他人差距大于相对损失时;绝对损失时,人们在相对获益时感知到的自我-他人差距小于相对损失时;当泛化难以进行时,上述效应消失。研究揭示了差距知觉的泛化效应及其联结机制。     

微信朋友圈使用对大学生抑郁的影响:负面社会比较和自我概念清晰性的作用

为探讨社交网站（微信朋友圈）使用对大学生抑郁的影响及其内在机制——负面社会比较的中介作用和自我概念清晰性的调节作用,采用社交网站使用强度问卷、负面社会比较量表、自我概念清晰性问卷和流调中心用抑郁量表,对武汉某高校 997名在校大学生进行调查,结果发现：（1）社交网站使用与负面社会比较和抑郁均呈显著正相关,而自我概念清晰性与负面社会比较和抑郁均呈显著负相关;（2）负面社会比较在社交网站使用对抑郁影响中的中介作用显著;（3）负面社会比较的中介效应受到自我概念清晰性的调节,且该中介效应在低自我概念清晰性群体中更为显著。