The role of memory for compounds in cue competition

Revisions of common associative learning models incorporate a within-compound association mechanism in order to explain retrospective cue competition effects (e.g., [Dickinson, A., & Burke, J. (1996). Within-compound associations mediate the retrospective revaluation of causality judgements. Quarterly Journal of Experimental Psychology, 49B, pp. 60-80.]). These models predict a correlation between memory for compounds (as a measure for the strength of within-compound associations) and retrospective cue competition but not forward cue competition. This was indeed found in a study of [Melchers, K. G., Lachnit, H., & Shanks, D. (2004). Within-compound associations in retrospective revaluation and in direct learning: A challenge for comparator theory. Quarterly Journal of Experimental Psychology, 57B, pp. 25-54.]. We argue that a higher-order reasoning account of causal learning can also explain the evidence for the role of within-compound associations in cue competition. Moreover, this account predicts that if making inferences during the learning stage is impeded, a correlation between memory for compounds and forward cue competition should be found as well. The results of a new study confirmed this prediction.     

Personality Types and Development of Adolescents' Conflict with Friends

This study examined the development of adolescents' conflict frequency and conflict resolution with their best friends, and tested whether adolescents with different personality types differed in these developmental changes from early to middle adolescence. Dutch adolescents (N = 922, 468 boys; M_age = 12.4 years at first wave) annually filled in questionnaires for five consecutive years. Growth modelling revealed that, whereas adolescents' conflict frequency and hostile conflict resolution did not change, positive problem solving, withdrawal, and compliance during conflict with best friends increased from age 12 to 16 years. Adolescents with different personality types differed in the mean levels of conflict frequency and conflict resolution strategies. That is, resilients had less conflict with friends than undercontrollers and overcontrollers. During conflict, resilients used the least hostile conflict resolution and compliance, and employed the most positive problem solving. Undercontrollers adopted the least positive problem solving, and overcontrollers complied and withdrew the most. Using a person‐centred approach, three developmental conflict resolution types were identified based on different constellations of the four conflict resolution strategies over time. Adolescents with different personality types had different distributions on the conflict resolution types. Copyright © 2013 John Wiley & Sons, Ltd.     

肺微小浸润腺癌及浸润前病变HRCT影像特征

为总结肺微小浸润腺癌(MIA)、原位腺癌(AIS)及不典型腺瘤样增生(AAH)结节的HRCT影像特征,回顾性收集43例术前2周内行HRCT检查、经胸腔镜切除、组织病理学证实的50个肺结节,分析结节大小、成分及内部特征.结果显示所有AAH表现为纯磨玻璃结节(pGGN),且≤1.0cm,空气支气管征未见,空泡征少见;86％AIS表现为pGGN,71％的AIS≤1.0cm,且空泡征常见(相对于AAH);95％的MIA表现为混合磨玻璃结节(mGGN),其余为实性结节,90％的MIA＞1.0cm,空气支气管征常见(相对于AIS).因此结节的大小、成分、空泡征及空气支气管征在一定程度上有助于MIA、AIS及AAH的鉴别.     

The protective role of long-term meditation on the decline of the executive component of attention in aging: a preliminary cross-sectional study

Life expectancy is constantly increasing. However, a longer life not always corresponds to a healthier life. Indeed, even normal aging is associated with a decline in different cognitive functions. It has been proposed that a central mechanism that could contribute to this widespread cognitive decline is an ineffective inhibitory attentional control. Meditation, to the other hand, has been associated, in young adults, to enhancement of several attentional processes. Nevertheless, attention is not a unitary construct. An influent model proposed the distinction of three subsystems: the alerting (the ability to reach and maintain a vigilance state), the orienting (the capacity of focusing attention on a subset of stimuli), and the conflict resolution or executive component (the ability to resolve conflict or allocate limited resources between competing stimuli). Here, we investigated, employing the Attentional Network Task (ANT), the specific impact of age on these three subcomponents, and the protective role of long-term meditation testing a group of older adults naïve to meditation, a group of age-matched adults with long-term practice of meditation, and a group of young adults with no previous meditation experience. We reported a specific decline of the efficiency of the executive component in elderly that was not observed in age-matched meditators. Our results are encouraging for the investigation of the potential beneficial impact of meditation on other cognitive processes that decline in aging such as memory. Moreover, they could inform geriatric healthcare prevention and intervention strategies, proposing a new approach for cognitive remediation in elderly populations.     

Causal competition based on generic priors

Although we live in a complex and multi-causal world, learners often lack sufficient data and/or cognitive resources to acquire a fully veridical causal model. The general goal of making precise predictions with energy-efficient representations suggests a generic prior favoring causal models that include a relatively small number of strong causes. Such “sparse and strong” priors make it possible to quickly identify the most potent individual causes, relegating weaker causes to secondary status or eliminating them from consideration altogether. Sparse-and-strong priors predict that competition will be observed between candidate causes of the same polarity (i.e., generative or else preventive) even if they occur independently. For instance, the strength of a moderately strong cause should be underestimated when an uncorrelated strong cause also occurs in the general learning environment, relative to when a weaker cause also occurs. We report three experiments investigating whether independently-occurring causes (either generative or preventive) compete when people make judgments of causal strength. Cue competition was indeed observed for both generative and preventive causes. The data were used to assess alternative computational models of human learning in complex multi-causal situations.     

进化心理学视角下的两性冲突与缓和

进化心理学观点认为两性冲突是一个性别达到最佳适应的过程被另一个性别所阻碍,其根本原因是两性繁衍成功的根本进化利益存在冲突。从进化心理学的角度,根据两性敌对性选择理论,两性冲突可以分为基因座内的两性冲突与基因座间的两性冲突,前者可由性选择理论解释,后者涉及到两性的适应与反适应以及在军备竞赛中的协同进化。而两性冲突缓和则可以由费舍尔模型与基因复制理论、性别二态性和一夫一妻制度解释。两性冲突及缓和也分别具有进化心理学的相关实证依据支持。未来两性冲突领域的研究需要提升研究方法的客观性及两性冲突特质的多样性,并关注两性冲突缓和的现实有效途径以及婚配制度与评估方式对繁衍成功的交互作用。     

An Experimental Investigation of Election Promises

We analyze the effect of election promises on electoral behavior in a laboratory experiment. In the experiment, politicians can make nonbinding election promises about how to split an endowment between themselves and the group. We find that promises affect both voting and voter beliefs about how much the politician will contribute to the public fund. The relationship is inverted U‐shaped with decreasing credibility of higher promises. Contributions of politicians are correlated with their promises in a similar pattern. The election promises are generally credible unless particularly high. Politicians keep promises more often if a reelection is possible and if the politician came into power by vote rather than by random draw. Voters reward high contributions in the previous period and punish promise breaking even after controlling for the contribution in the previous period or voters' beliefs about future contributions. By controlling for voters' beliefs, we distinguish retrospective from prospective voting. Our results suggest that voters both use promises for prospective voting and retrospectively punish broken promises.     

Conflict Resolution and Peer Mediation in Middle Schools: Extending the Process and Outcome Knowledge Base

Abstract

Many professional educators are implementing school-based prevention focused on conflict resolution (CR) and peer mediation (PM). The authors conducted research on CR-PM in 3 middle schools. Specifically, they surveyed teachers and students, tracked disciplinary incidents across school years, collected mediation data, and compared mediators with a matched sample to determine attitudinal change as a result of PM training and experience. The authors also surveyed peer mediators and disputants about program satisfaction, as well as peer mediators and their parents about the generalization of PM skills. The authors conclude with implications for developing future CR programs, including a focus on mediation-process evaluation as well as schoolwide outcome measures and the use of peer mediation training as an intervention for students at risk.     

The influence of facial masculinity and voice pitch on jealousy and perceptions of intrasexual rivalry

The assessment of same-sex individuals as intrasexual competitors may depend in part on the perceived mate value of potential rivals. Men’s and women’s preferences for vocal and facial masculinity suggest that feminine women and masculine men may be perceived as more threatening intrasexual competitors. We tested the influence of men’s and women’s vocal and facial masculinity on preferences for who should accompany romantic partners on a weekend trip and on jealousy in response to imagined flirting. We found that men and women preferred their partners to be accompanied by people who had less masculine/feminine voices, and were more jealous in response to people who had relatively more masculine/feminine voices. Women, but not men, rated faces with exaggerated sex-typical characteristics as undesirable travel companions for their romantic partners and reported more jealousy in response to imagined flirting from such faces. We also found that participants who rated masculine male and feminine female stimuli as more attractive also perceived such stimuli as greater intrasexual threats, demonstrating individual differences in competition-related social perceptions. Our findings indicate that perceptions related to intrasexual competition are related to cues to underlying mate quality, which may aid in effective mate guarding.     

Conflict Resolution as a Dyadic Mediator: Considering the Partner Perspective on Conflict Resolution

So far, relationship research has only considered an intrapersonal perspective on links between adult attachment, conflict resolution and relationship satisfaction. This study investigated the mediating effects of partner‐reported conflict resolution styles among the attachment dimensions of avoidance and anxiety, and relationship satisfaction in a sample of 207 heterosexual couples. Dyadic and structural aspects of mediation were tested using the Actor–Partner Mediator Model with latent variables. Few significant partner‐related meditational pathways were found indicating compensating effects of positive problem solving and compliance. More frequent positive problem solving could improve relationship satisfaction, even when the partner showed higher scores on anxious attachment. In addition, the use of compliance could suppress the negative effects of attachment avoidance on partner's relationship satisfaction. Copyright © 2011 John Wiley & Sons, Ltd.