Snake mating systems, behavior, and evolution: the revisionary implications of recent findings

Sexual selection and mating systems profoundly influence the behavior and psychology of animals. Using their own studies of green anacondas (Eunectes murinus) and reviewing other recent studies, the authors conclude that incomplete data derived from a few well-studied snake species have led to general acceptance of polygyny as the dominant mating system in snakes. New data on behavior, paternity, and life history in a diverse taxonomic array of snakes support the view that polyandry is not only common in snakes but may have been the ancestral mating system. This interpretation helps to explain many seemingly paradoxical behavioral differences between lizards and snakes, such as the lack of territorial systems in most snakes and their frequent female-biased sexual size dimorphism.     

Not sensitive,yet less biased: A signal detection theory perspective on mindfulness,attention, and recognition memory

The practice of mindfulness has been argued to increase attention control and improve memory performance. However, it was recently suggested that the effect of mindfulness on memory may be due to a shift in response-bias, rather than to an increase in memory-sensitivity. The present study examined the mindfulness-attention-memory triad. Participants filled in the five-facets of mindfulness questionnaire, and completed two recognition blocks; in the first attention was full, whereas in the second attention was divided during the encoding of information. It was found that the facet of non-judging (NJ) moderated the impact of attention on memory, such that responses of high NJ participants were less biased and remained constant even when attention was divided. Facets of mindfulness were not associated with memory sensitivity. These findings suggest that mindfulness may affect memory through decision making processes, rather than through directing attentional resources to the encoding of information.     

Dopamine and serotonin systems modify environmental effects on human behavior: A review

The relative influences of genetic and environmental factors in the development of human behavior have been a long‐term topic for an intense debate. Recent behavioral genetic studies suggest focusing on the joint effect of genes and environment, and especially on the life‐course developmental interplay between nature and nurture. Vulnerability to environmental adversities and sensitivity to its benefits may be conditional on genetic background, and regarding psychological outcomes, these kinds of gene × environment interactions may be of higher importance than direct gene–trait associations. In our recent series of studies, we have shown that different variants of serotonergic and dopaminergic genes may moderate the influence of environmental conditions on a range of psychological outcomes, i.e. temperament, depression, hostility, and educational attainment. These studies suggest that depending on their genotype, people may be differentially sensitive to the environmental conditions they encounter. In the light of these results it seems highly plausible that the effects of genes may become evident only when studied in the context of environmental factors.     

Language and life history: a new perspective on the development and evolution of human language

It has long been claimed that Homo sapiens is the only species that has language, but only recently has it been recognized that humans also have an unusual pattern of growth and development. Social mammals have two stages of pre-adult development: infancy and juvenility. Humans have two additional prolonged and pronounced life history stages: childhood, an interval of four years extending between infancy and the juvenile period that follows, and adolescence, a stage of about eight years that stretches from juvenility to adulthood. We begin by reviewing the primary biological and linguistic changes occurring in each of the four pre-adult ontogenetic stages in human life history. Then we attempt to trace the evolution of childhood and juvenility in our hominin ancestors. We propose that several different forms of selection applied in infancy and childhood; and that, in adolescence, elaborated vocal behaviors played a role in courtship and intrasexual competition, enhancing fitness and ultimately integrating performative and pragmatic skills with linguistic knowledge in a broad faculty of language. A theoretical consequence of our proposal is that fossil evidence of the uniquely human stages may be used, with other findings, to date the emergence of language. If important aspects of language cannot appear until sexual maturity, as we propose, then a second consequence is that the development of language requires the whole of modern human ontogeny. Our life history model thus offers new ways of investigating, and thinking about, the evolution, development, and ultimately the nature of human language.     

组织公正氛围的理论机制、研究视角及研究框架

组织公正是员工对工作场所公正环境的心理感知, 研究层面有个体与群体之分。以往研究多集中在个体层面, 以致研究结果缺乏对群体现象的有效解释。进入新世纪学者们开始关注群体层面的公正氛围研究, 并在理论和实证方面取得了较大突破。通过回顾相关研究可以发现：(1)在理论机制上, 公正氛围的形成可以通过社会信息加工理论、吸引-选择-磨合模型、公正传染概念和公正启发理论来解释; (2)在研究视角上, 主要存在维度视角、整体视角、感知来源视角、氛围属性视角和第三方视角; (3)在研究主题上, 主要涉及领导、团队和组织三方面对公正氛围的影响, 以及公正氛围对个体、团队和组织三个层面的影响效果。未来研究可着重从多种领导行为对不同公正氛围影响的比较、其他领导因素对公正氛围的影响、不同公正氛围对结果变量影响的比较、新视角公正氛围测量方法的尝试, 以及文化因素对公正氛围的影响研究等方面入手。     

Choice, matching, and human behavior: A review of the literature

This review concerns human performance on concurrent schedules of reinforcement. Studies indicate that humans match relative behavior to relative rate of reinforcement. Herrnstein's proportional matching equation describes human performance but most studies do not evaluate the equation at the individual level. Baum's generalized matching equation has received strong support with humans as subjects. This equation permits the investigation of sources of deviation from ideal matching and a few studies have suggested variables which control such deviations in humans. While problems with instructional control are raised, the overall findings support the matching law as a principle of human choice.     

Sexual revictimization among women: A review of the literature focusing on empirical investigations

This article provides a review of the literature on sexual revictimization among women, focusing on empirical evaluations of theories of revictimization. Theories of revictimization can be categorized into eight major areas: spurious factors, situational or environmental variables, disturbed interpersonal relationships, cognitive attributions, self-blame and self-esteem, coping skills, perception of threat and trauma-related symptomatology, and general psychological adjustment. In general, none of these theories has received unequivocal empirical support. Situational variables and general psychological adjustment have received modest support as factors that differentiate revictimized women from non-revictimized women. Our ability to interpret this trend is limited, however, by the preponderance of retrospectively designed investigations in this area.     

Decisions and the evolution of memory: multiple systems, multiple functions

Memory evolved to supply useful, timely information to the organism's decision-making systems. Therefore, decision rules, multiple memory systems, and the search engines that link them should have coevolved to mesh in a coadapted, functionally interlocking way. This adaptationist perspective suggested the scope hypothesis: When a generalization is retrieved from semantic memory, episodic memories that are inconsistent with it should be retrieved in tandem to place boundary conditions on the scope of the generalization. Using a priming paradigm and a decision task involving person memory, the authors tested and confirmed this hypothesis. The results support the view that priming is an evolved adaptation. They further show that dissociations between memory systems are not--and should not be--absolute: Independence exists for some tasks but not others.     

Testosterone, cortisol, and serotonin as key regulators of social aggression: A review and theoretical perspective

In human and non-human animals the steroid hormones cortisol and testosterone are involved in social aggression and recent studies suggest that these steroids might jointly regulate this behavior. It has been hypothesized that the imbalance between cortisol and testosterone levels is predictive for aggressive psychopathology, with high testosterone to cortisol ratio predisposing to a socially aggressive behavioral style. In this review, we focus on the effects of cortisol and testosterone on human social aggression, as well as on how they might modulate the aggression circuitry of the human brain. Recently, serotonin is hypothesized to differentiate between impulsive and instrumental aggression, and we will briefly review evidence on this hypothesis. The aim of this article is to provide a theoretical framework for the role of steroids and serotonin in impulsive social aggression in humans.