Targets and tactics of agonistic and precopulatory behavior in montane and prairie voles: Their relationship to juvenile play-fighting

Play-fighting by juvenile montane and prairie voles involves attack and defense of the head, neck and shoulders. Since during play animals typically borrow behavior patterns from other functional contexts, two adult behavioral contexts were compared to juvenile play-fighting. These were serious fighting and sexual encounters. During serious fighting in a resident-intruder paradigm, most bites are directed at the rump and lower flanks. During sexual encounters, especially in precopulatory behavior, the head, neck and shoulders are gently contacted. Therefore, play-fighting by juveniles would appear to involve attack and defense of areas of the body contacted in adult precopulatory behavior, not adult fighting. Furthermore, the species-specific differences in juvenile play-fighting were also found to be matched by species-specific differences in precopulatory behavior. In both playful and precopulatory encounters, montane voles contacted the head and used upright defensive behaviors more often than prairie voles. In contrast, prairie voles made mutual contact more often and were more likely to rotate to supine in defense of contact to the nape and head. These findings support our hypothesis that juvenile play-fighting in muroid rodents involves the precocial expression of precopulatory, not agonistic behavior.     

Ratio Bias and Policy Preferences: How Equivalency Framing of Numbers Can Affect Attitudes

Numbers permeate modern political communication. While current scholarship on framing effects has focused on the persuasive effects of words and arguments, this article shows that framing of numbers can also substantially affect policy preferences. Such effects are caused by ratio bias, which is a general tendency to focus on numerators and pay insufficient attention to denominators in ratios. Using a population‐based survey experiment, I demonstrate how differently framed but logically equivalent representations of the exact same numerical value can have large effects on citizens' preferences regarding salient political issues such as education and taxes. Furthermore, the effects of numerical framing are found across most groups of the population, largely regardless of their political predisposition and their general ability to understand and use numerical information. These findings have significant implications for our understanding of framing effects and the role played by numbers in public opinion formation.     

劝捐策略和框架效应对个体捐赠决策的影响

采用两个3×2完全随机实验设计,考察劝捐策略和目标框架效应对个体捐赠决策的影响,结果表明：（1）劝捐策略和目标框架效应的主效应显著,信用劝捐被试捐赠更多,决策时间更短,损失目标框架比收益目标框架的被试决策时间更短,捐赠更多,被试在信用X损失框架情境中捐赠最多,反应时最短;（2）劝捐策略和框架效应的交互效应均显著,情感策略受框架效应影响较大,在损失框架下被试反应时更短,捐赠更多。     

Metadialogues for Resolving Burden of Proof Disputes

In this paper, a solution to the problem of analyzing burden of proof in argumentation is developed by building on the pioneering work of Erik C. W. Krabbe on metadialogues. Three classic cases of burden of proof disputes are analyzed, showing how metadialogue theory can solve the problems they pose. The solution is based on five dialectical requirements: (1) global burden of proof needs to be set at the confrontation stage of a dialogue, (2) there need to be special mechanisms for resolving disputes about burden of proof at all four stages of the dialogue, (3) they are especially significant during the argumentation stage, where burden of proof often shifts back and forth at each move, (4) such local shifts need to be partly regulated by the global burden of proof already set, and (5) the connection between burden of proof and the speech act of making a presumption in a dialogue needs to be clarified.     

小儿巨大肾积水的循证诊疗策略与思考

通过典型的病例分析,分别从小儿巨大肾积水的概念、影像学诊断、无功能肾脏的判断以及治疗方式的选用等方面入手,结合循证医学实践的三大要素,包括利用最佳的临床研究证据、注重医生的专业技能和经验、尊重患者的期望和权利。简述临床上治疗小儿巨大肾积水时所应当采用的循证诊疗策略,以及从中引申出来的哲学思考。     

Socialization tactics, proactive behavior, and newcomer learning: Integrating socialization models

The purpose of the study was to examine how socialization processes (socialization tactics and proactive behavior) jointly affect socialization content (i.e., what newcomers learn) and adjustment. Longitudinal survey data from 150 business and engineering graduates during their first 7 months of work indicate that: (1) institutionalized socialization and proactive behavior are each associated with newcomer learning, (2) the socialization processes and learning are each associated with various forms of adjustment, and (3) the socialization processes are associated with adjustment, while controlling for learning. These findings suggest that how newcomers are socialized has substantive and symbolic value over and above what they actually learn.     

Effects of Gender, Education, and Age upon Leaders’ Use of Influence Tactics and Full Range Leadership Behaviors

Relationships of gender, age, and education to leadership styles and leaders’ influence tactics were examined with 56 leaders and 234 followers from a variety of organizations. Leadership behaviors were measured with the Multi-factor Leadership Questionnaire (MLQ—rater version). Influence tactics were measured with Yukl’s Influence Behavior Questionnaire (IBQ). Multivariate Analysis of Variance (MANOVA) was used to test behavioral differences attributed to leaders’ gender, age, and education groups, as well as the interaction of age and education with gender. Results show that gender produced a small direct effect on leadership behaviors. The interaction of gender and education produced consistent differences in leadership behaviors. Implications for future research are provided, and a call for re-analysis of previously published work is advised.     

情感广告的传播效果及作用机制

情感诉求在现代广告中运用非常广泛,并已成为西方广告心理研究的热点问题之一。研究者们重点探讨了情感诉求的作用机制、情感诉求所能达到的传播效果及影响其传播效果的相关因素。文章对这些研究进行了较系统的考察,并提出了现有研究依然存在的一些问题     

The organization of play fighting in the grasshopper mouse (Onychomys leucogaster): Mixing predatory and sociosexual targets and tactics

The body targets contacted, the type of contact made, and the patterns of defense and counterattack elicited by those attacks are examined in the play fighting of captive male and female pairs of grasshopper mice. The nape was the most frequently contacted body target, irrespective of the type of contact made, be it nosing, allogrooming, biting, or striking with a forepaw. The types of defense varied with both body area contacted and type of attack performed. Based on the topography and pattern of contact, it was concluded that grasshopper mice, as is the case for many other muroid rodents, primarily attack and defend targets otherwise contacted during precopulatory encounters. However, grasshopper mice, which are obligate carnivores, also attack and defend predatory targets, although less frequently than sociosexual targets. Surprisingly, predatory attacks were more likely to be counterattacked with predatory attacks, whereas sociosexual attacks were more likely to be counterattacked with sociosexual attacks. Conspecific aggression involves bites directed at the face, lower flanks, and dorsum. Neither the biting of these areas nor the tactics of attack and defense usually associated with such bites were observed during the juvenile interactions. There were no sex differences in either frequency or patterns of attack and defense in play fighting. The data presented for grasshopper mice shed light on the issue of mixing behavior patterns from multiple functional systems during play. Aggr. Behav. 26:319–334, 2000. © 2000 Wiley‐Liss, Inc.     

态度改变的睡眠者效应研究概述

睡眠者效应是态度改变研究中一个有趣而反常的现象,是指在态度改变过程中,说服效果随着时间的推移不降低反而提高的一种现象。从霍夫兰1949年首次命名以来,对睡眠者效应研究的范围不断扩大,数量不断增多,研究逐渐深入。三种具有影响力的理论解释得以提出：线索分离假说、差别衰退假说和有用性-有效性假说。睡眠者效应产生的条件也被反复探究。当前对睡眠者效应研究的趋势是探索睡眠者效应的内在机制,并将其整合到统一的态度改变研究中去,同时展开睡眠者效应的应用研究。该文沿着历史的脉络,叙述了睡眠者效应研究中提出的理论,存在的争议和未来研究的趋势。