Human social defeat and approach–avoidance: Escalating social-evaluative threat and threat of aggression increases social avoidance

Basic research on avoidance by Murray Sidman laid the foundation for advances in the classification, conceptualization and treatment of avoidance in psychological disorders. Contemporary avoidance research is explicitly translational and increasingly focused on how competing appetitive and aversive contingencies influence avoidance. In this laboratory investigation, we examined the effects of escalating social-evaluative threat and threat of social aggression on avoidance of social interactions. During social-defeat learning, 38 adults learned to associate 9 virtual peers with an increasing probability of receiving negative evaluations. Additionally, 1 virtual peer was associated with positive evaluations. Next, in an approach–avoidance task with social-evaluative threat, 1 peer associated with negative evaluations was presented alongside the peer associated with positive evaluations. Approaching peers produced a positive or a probabilistic negative evaluation, while avoiding peers prevented a negative evaluation (and forfeited a positive evaluation). In an approach–avoidance task with social aggression, virtual peers gave and took money away from participants. Escalating social-evaluative threat and aggression increased avoidance, ratings of feeling threatened and threat expectancy and decreased ratings of peer favorableness. These findings underscore the potential of coupling social defeat and approach–avoidance paradigms for translational research on the neurobehavioral mechanisms of social approach–avoidance decision-making and anxiety.     

Neuropharmacological aspects of adaptive pain inhibition in murine “victims” of aggression

This review outlines recent research on a subset of physiological responses in murine “victims” or aggression. In a typical resident-intruder paradigm, the detailed study of intruders has revealed that exposure to conspecific attack (and related stimuli) is associated with two forms of analgesia which appear to be integral components of the murine defensive repertoire. In response to intense/enduring attack, intruder mice display a profound, long-lasting and opioid-mediated analgesia. This reaction is highly correlated with defensive immobility and may function to reduce involuntary cues to further attack. In contrast, the inhibition of pain reactivity in mice tested immediately upon the display of defeat is less intense, shorter-lasting, non-opioid in nature and may function to facilitate active defenses such as escape. As this form of pain inhibition is also evident in intruders exposed to the scent of an aggressive male conspecific, a possible anticipatory defensive function linked to mechanisms of anxiety has been proposed. This hypothesis is supported by 1) the prevention of defeat analgesia by a range of antianxiety drugs (benzodiazepines, 5-hydroxytryptamine_1A [5-HT_1A] receptor agonists, and 5-HT₃ receptor antagonists) and 2) the effects of social defeat on behavior in the elevated plusmaze model of anxiety. These findings are discussed in relation to coping mechanisms in murine “victims” of aggression. © 1995 Wiley-Liss, Inc.     

Testosterone and cortisol responses to competitive fighting in human males: A pilot study

Serum testosterone and cortisol levels were measured by radioimmunoassay in 14 young male judo competitors, in samples taken 10 minutes before and 45 minutes after two different procedures. The first involved physical exercise and the second competitive fighting. Both procedures were of 5 minutes duration and sessions took place at the same time (between 10:00 A.M. and 12:00 P.M. local time) but on different days. Comparing the two situations over all subjects revealed that testosterone increased after exercise and decreased slightly after Competition. Between subject comparisons suggested that contrary to previous claims, winning or losing did not significantly change the testosterone and cortisol levels. Comparisons of subjects who were members of the Regional Team with individuals who were not part of that group confirmed that members increased their testosterone levels after competition, whereas the nonmembers showed a significant decrease. Moreover, success of the individuals, in their sporting record, correlated positively and significantly with the changes of testosterone observed during the competition. These preliminary results suggest that previous personal experience of success can influence the pattern of the psychoendocrine response to a contest situation.     

Anxiety,hormonal responses,and coping during a judo competition

Competitive situations induced hormonal changes, depending on the outcome, victory or defeat. This study aimed to investigate the salivary testosterone (T) and cortisol (C) and the mental state responses to a real judo championship. Data about individuals’ anxiety levels, strategies of coping, and patterns of behavior were thus collected. The relationship between hormonal changes and psychological variables were also analyzed. Our results showed a C response to competition, which was especially characterized by an anticipatory rise. Depending on outcome, results did not show statistically significant different C responses. The T values noted after the last fight were significantly greater in the losers than those obtained in the winners. Hormonal response did not show a relationship with psychological variables depending on the outcome. Losers showed just before the first fight an elevated cognitive anxiety, accompanied by low self‐confidence. Moreover, they were characterized by type B behavior. Types of coping strategies also differentiated losers from winners. Finally, even if no relationships between hormonal and psychological variables depending on the outcome were found, our results showed that state and trait psychological variables, as well as the coping strategies, must be taken into account to better understand the response to competitive situations. Aggr. Behav. 27:55–63, 2001. © 2001 Wiley‐Liss, Inc.     

中学生成就动机与成功恐惧的研究

运用成就动机问卷与投射测验研究了454名中学生的成就动机与成功恐惧,结果表明,中学生的成就动机存在显著的学校类型差异,重点中学学生的成就动机显著强于普通中学学生。男生和女生均存在着成功恐惧,其恐惧主要与学业、人际关系、家庭和事业有关。被试在女主人公身上投射出更多的成功恐惧。中学生追求成功的动机与成功恐惧呈显著的负相关,而避免失败的动机与成功恐惧呈显著的正相关。     

Androgen dynamics in the context of children's peer relations: an examination of the links between testosterone and peer victimization

Testosterone levels have been shown to decrease in the face of social defeat in several mammalian species. Among humans, the loss of social status has been studied primarily in the context of athletic competition, with winners having higher testosterone levels than losers. This study examined testosterone levels in relation to peer victimization (bullying) in a sample of 151 boys and girls aged 12–13. Statistically controlling for age and pubertal status, results indicated that on average verbally bullied girls produced less testosterone and verbally bullied boys produced more testosterone than their nonbullied counterparts. Similar trends were evident comparing social and physical bullying with testosterone. Sex differences are discussed in terms of empirically validated differences in coping styles, as girls tend to internalize, whereas boys tend to externalize, their abuse. Aggr. Behav. 35:103–113, 2009. © 2008 Wiley‐Liss, Inc.     

先秦兵家决策心理思想研究

先秦兵家具有丰富的决策心理思想,主要观点如下：1“知彼知己,百战不殆”──全面信息管理心理思想。2“校之以计,而索其情”──全方位收集分析信息;这段时期兵家提出的收集信息方法和手段可以概括为以下几点：（1）分析推断;（2）观察法;（3）用间法;（4）侦察法。3“多算胜,少算不胜”的决策心理思想：先秦兵家的决策心理思想是以“全胜而非战”为目标,以全面的信息管理为前提,并且包含有三条原则：“善之善者”的优选原则;“践墨随敌”的调控原则;“奇正相生”的变化原则。     

Aversive potency of urine from dominant and subordinate male laboratory mice (Mus musculus): Resolution of a conflict

The present study assessed the aversive potency of urine collected from male albino mice that had been clearly identified as dominants/winners or subordinates/losers of paired aggression tests and then housed either individually or in a quasi-paired situation in which only a wire-mesh divider separated the two mice. This divider permitted constant visual, olfactory, auditory, and some tactile contact. The responses of individually tested, group-housed males were recorded when half of the substrate in a test box was treated with either water or one of the four urine types; the other half remained untreated. Significant preferences for the untreated half were found when the urine of winners or losers housed in individual metabolism cages or that of pair-housed dominants was used as the test stimulus. On the other hand, neither water nor the urine of cohabiting subordinate males was avoided. The present findings confirmed our earlier reports that the urine of dominant male mice was aversive, whereas that of their cohabiting subordinate partners was not. They also identified Sawyer's [1978] procedure of housing winners and losers in individual cages, with the consequent interruption of social contact as the likely reason for his failure to replicate our reports that subordinate male urine lacked aversive properties. The territorial implications of the aversive factor and other urinary signals are discussed.     

The role of personality in defeat: a revised social rank model

This study sought to test the role of personality within the social rank theory of depression. Specifically, self‐criticism was hypothesised to be a risk factor for mechanisms underlying involuntary subordination, while self‐efficacy was hypothesised to have a protective function. Involuntary subordination has been implicated as an underlying cause of depression and it was therefore important to determine the personality variables and other intrapsychic mechanisms that lead to this condition. The sample consisted of 115 participants (average age of 20.2 years) who were involved in athletic competition. Participants were evaluated at baseline for personality and social rank variables and for mood immediately before and after a competitive match. Two models were tested: the first model showed that self‐criticism and neuroticism predicted a heightened perception of defeat following a loss. Self‐criticism also predicted an inability to accept defeat which was associated with a latent variable interpreted as involuntary subordination. The second model demonstrated that self‐efficacy was associated with a more adaptive response to defeat, being negatively related to the perception of defeat. Both models proved to be viable and suggest that different personality styles confer specific vulnerabilities to involuntary subordination in the context of defeating events. Copyright © 2007 John Wiley & Sons, Ltd.