What makes a girl (or a boy) popular (or unpopular)? African American children's perceptions and developmental differences

Open-ended questions were used to obtain narrative accounts of what makes a girl (or a boy) popular (or unpopular) at school. The participants were 489 African American students in Grades 1, 4, and 7 recruited from high-risk inner-city neighborhoods. Appearance and self-presentation were mentioned the most in Grades 4 and 7. Prosocial characteristics were especially relevant for popularity in Grade 1, as were studentship in Grade 4 and peer affiliations in Grade 7. Deviant behaviors were nominated for popularity more frequently in Grade 7 than in the younger grades and more for boys' popularity than for girls'. The mean deviance scores were negative in all grade levels, suggesting a normative peer culture. Male groups in Grade 7 showed significant homophily in reports of deviant behaviors.     

对从HSK题库中计算机自动生成试卷稳定性的试验检验

由计算机从题库中自动生成的试卷能否保持难度的相对稳定？根据IRT进行的等值误差范围有多大？为了回答这些问题,本文以共同组等值作为标准,对基于IRT之上的共同题等值误差进行了试验检验。试验中,采取一定措施保证了考生的动机水平。结果显示,IRT等值的校正方向都是正确的。在4个分测验中有3个分测验的的等值校正效果较理想,1个分测验的等值校正效果不够理想。计算机自动生成的试卷与原有人工命制的试卷在得分方面比较一致,分数相关达到0.931,获得证书的情况也是比较一致的。     

Microwave-induced heating of a single glassy phase and a two-phase material consisting of a metallic glass and Fe powder

Metallic glasses exhibit low viscosity in a temperature range between the glass transition and the crystallization temperature, a feature that allows successful sintering of glassy powders. Microwave heating, being volumetric, has significant advantages over conventional heating in materials processing, such as substantial energy savings, high heating rates and process cleanliness. In the present study, we investigate the stability of Cu₅₀Zr₄₅Al₅ glassy powders and the formation of a bulk two-component metallic glassy-crystal sample by microwave heating in a single-mode cavity (915 MHz) in an alternating magnetic field.     

Vagueness as closeness

This paper presents and defends a definition of vagueness, compares it favourably with alternative definitions, and draws out some consequences of accepting this definition for the project of offering a substantive theory of vagueness. The definition is roughly this: a predicate ‘F’ is vague just in case for any objects a and b, if a and b are very close in respects relevant to the possession of F, then ‘Fa’ and ‘Fb’ are very close in respect of truth. The definition is extended to cover vagueness of many-place predicates, of properties and relations, and of objects. Some of the most important advantages of the definition are that it captures the intuitions which motivate the thought that vague predicates are tolerant, without leading to contradiction, and that it yields a clear understanding of the relationships between higher-order vagueness, sorites susceptibility, blurred boundaries, and borderline cases. The most notable consequence of the definition is that the correct theory of vagueness must countenance degrees of truth.     

卡片数量和卡片比率对经典四卡问题解决的影响

两个实验分别操纵四卡问题中四类卡片(P、-P、Q、-Q)的数量或Q卡与-Q卡之间的比率,以探讨四类卡片的数量关系对经典四卡问题解决的影响,从而间接推断被试解决经典四卡问题时所采用的策略。实验一等比率地增加P卡、-P卡、Q卡、-Q卡的数量,结果发现,等比率地增加P卡、-P卡、Q卡、-Q卡的数量,使得P卡和Q卡被选择的比率减小,而-P卡和-Q卡被选择的比率不存在显著变化。实验二按不同比率操纵Q卡和-Q卡的数量,结果发现,当Q卡和-Q卡出现的比率不同时,Q卡数目越多,Q卡被选择的平均比率越小,但没有影响到P、-P卡和-Q卡被选择的比率。这些结果表明被试解决经典四卡问题时采用了"匹配偏向"策略。     

Double Reference Points: the Effects of Social and Financial Reference Points on Decisions Under Risk

The existing literature is inconsistent about how social comparison affects risk attitudes. We propose a framework where the total utility is composed of the social and financial utilities. The financial utility is consistent with prospect theory (i.e., an S‐shaped utility function with a financial reference point), whereas the social utility is affected by both social and financial reference points. Therefore, social risk attitudes are determined by interaction between gains/losses in both social and financial contexts. On the basis of safety‐first principle, we propose that when experiencing financial gains, individuals tend to seek upside potential and take social risks (i.e., a convex social utility function). In contrast, when facing financial losses, people would be more risk seeking in social gains but more risk averse in social losses to maximize security (i.e., an inverse S‐shaped utility function). We also propose that the relative importance of financial and social utilities depends on the saliency of the reference points and size of stakes. Studies 1 and 2 showed that individuals were risk seeking in both social gains and losses with social reference points alone. Studies 3 and 4 demonstrated that when both financial and social reference points were salient, participants were risk averse in both social gains and losses when facing financial gains, but risk seeking in social gains and risk averse in social losses when facing financial losses. The hypotheses derived from the theoretical framework were in general supported by our experiments. Copyright © 2015 John Wiley & Sons, Ltd.     

Approach or avoid? The effect of regulatory focus on consumer behavioural responses to personal selling attempts

While salespeople use adaptive influence tactics in interactions with consumers, consumers can act as goal-oriented individuals attempting to manage those interactions. Prior research has documented a repertoire of consumer response behaviours, but little is known about the motivational forces. The present research examines the effects of regulatory focus on consumer behavioural tendencies in response to personal selling attempts. The findings suggest that the more promotion-focused consumers are more likely to engage in goal-seeking behaviours. This research not only addresses a void in the literature, but more importantly, sheds light on motivational antecedents driving consumer behaviours in customer–salesperson interactions.     

潜在剖面分析在区分抑郁情绪患者的应用

目的：使用情绪启动的研究范式,探讨情绪启动对抑郁情绪患者的分类效果.方法：抽取35名抑郁情绪患者和35名正常被试,分别完成6种条件的实验任务,采用潜在剖面分析和logistic回归分析,分析6种条件对两组被试的分类结果.结果：两组被试在6种条件下对人脸表情判断的正确数和反应时存在显著差异,抑郁患者的反应时间明显延长,识别的正确数比正常被试少,潜在剖面分析的结果与真实结果具有较高的一致性.结论：潜在剖面分析能较好地区分正常组与抑郁组患者,为鉴别正常人与抑郁情绪患者提供新的途径.     

K-means、潜在类别模型和混合Rasch模型的比较

基于模拟研究比较了K-means方法、潜在类别模型和混合Rasch模型在二分外显变量情境下的聚类效果.结果表明：（1）潜在类别数量、变量数量、样本量、样本平衡和变量间相关对K-means方法、潜在类别模型和混合Rasch模型的分类准确性均有影响且因素间的交互作用存在;（2）除了在2个潜在类别的样本不平衡条件下K-means方法表现较差外,在其他条件下与潜在类别模型和混合Rasch模型的表现相当;（3）混合Rasch模型的分类一致性在2个潜在类别的情境下要好于潜在类别模型,但是在4个潜在类别的情境下要差于潜在类别模型.     

Correction to: Intrapersonal and Interpersonal Sources of Resilience: Mechanisms of the Relationship Between Bullying Victimization and Mental Health Among Migrant Children in China

Applied Research in Quality of Life -