Evolution and Two Popular Proposals for the Definition of Function

Summary  In the biological realm, a complete explanation of a trait seems to include an explanation in terms of function. It is natural to ask of some trait, “What is its function?” or “What purpose in the organism does the particular trait serve?” or “What is the goal of its activity?” There are several views concerning the appropriate definition of function for biological matters. Two popular views of function with respect to living things are Cummins’ organizational account and the Griffiths/Godfrey-Smith modern history account. Whereas Cummins argues that a trait functions so as to contribute to the general organization of some organism’s present structure, Griffiths, and Godfrey-Smith argue that a trait functions because of its fitness with respect to the organism’s recent evolutionary history. In this paper, I show how these accounts can be made compatible and compliment one another. Given that structure, organization, operational flexibility, function, and evolutionary history are all factors to be considered in an organism’s makeup, we should expect that the traits of an organism function the way they do because such traits presently contribute to the overall organization of the organism (Cummins) as well as were selected for in the organism’s species’ recent ancestry (Griffiths/Godfrey-Smith).     

Capturing the Naturally Occurring Superior Performance of Experts in the Laboratory: Toward a Science of Expert and Exceptional Performance

ABSTRACT— Expertise researchers have traditionally shied away from studying the highest levels of achievement in favor of studying basic cognitive processes, such as memory and categorization. In this article, we present a different approach that is focused on capturing superior (expert) performance on representative tasks that reveal the essential characteristics of expertise in a given domain. In domains where expert performance is measurable, acquisition is gradual and the highest levels are only attained after 10 years of intense preparation—even for the most "talented." Analyses of reproducibly superior performance show that it is mediated by physiological adaptations and cognitive skills acquired as a result of the cumulative effects of special practice activities (deliberate practice). It appears that the genes necessary to attain such adaptations and expert skills can be activated in healthy children—the only clear exceptions to date being genes that control body size and height. Our knowledge of how experts acquire their superior skills provides insights into the potential for human adaptation and skill acquisition and has important implications for theories of the structure of general and expert cognition, as well as for training interventions in applied psychology and education.     

Social neuroscience of child and adolescent depression

The social neuroscience of child and adolescent depression is inherently multidisciplinary. Depressive disorders beginning early in life can have serious developmental and functional consequences. Psychopathology research has described depression's defining clinical and contextual features, and intervention research has characterized its response to treatment and prevention programs. Neuroendocrine, electrophysiological, and neuroimaging studies have identified core neurobiological aspects of early-onset mood disorders. These areas are reviewed using a developmental social neuroscience perspective for integrating disparate observations. The paper introduces a dynamic adaptive systems framework, and it discusses hedonic capacity, stress sensitivity, ruminative self-focus, and attentional impairments as fundamental components of mood disorders.     

虚拟团队学习效能研究:社会认知因素的影响

本研究采用现场研究的方法,对21个虚拟团队学习的效能进行了实证研究。研究对社会认知因素中的效能感和目标取向对虚拟团队学习效能(技能改变、工作任务和团队健康水平)的影响进行了研究,并探讨了对虚拟团队的态度在中间所起的作用。研究发现,虚拟团队效能感和学习取向对虚拟团队的学习效能产生作用,而对虚拟团队学习的态度、团队信任对虚拟团队学习的效能起着中介或直接的作用。     

流动儿童社会适应的研究:现状、问题及解决办法

参照国外关于移民儿童社会适应研究的现状,对国内流动儿童社会适应的研究现状进行了回顾,指出了国内该研究领域存在的几个不足:(1)评估指标不全面;(2)评估存在缺陷取向;(3)忽视个体差异的问题;(4)研究设计与社会适应的过程理论相背离;(5)教育安置方式对流动儿童社会适应的影响未得到应有的重视。最后提出了解决以上问题的办法。     

自尊和心理控制源对留守儿童社会适应的影响研究

本研究以积极心理学理论为依据,采用量表法,对农村留守儿童和非留守儿童进行了比较研究。结果表明:留守儿童和非留守儿童在自尊、心理控制源以及社会适应性上都存在着显著性差异。在该研究结果上,深入分析了高自尊和内控归因这两种积极心理品质作为心理弹性的保护性因子对留守儿童社会适应性所发挥的作用。     

中国青少年心理健康素质·适应状况的研究

应用《青少年心理健康素质调查表·适应分量表》,对全国23个省、市、自治区44063名青少年的适应状况进行了调查。结果发现：（1）青少年的适应状况处于较好的水平。（2）青少年适应及情绪适应、学习适应、人际适应、社会适应和生活适应等各维度得分在小学五年级较高,从初中阶段开始呈下降趋势,高中阶段继续下降,到大学阶段又逐渐回升。生理适应维度得分在小学五年级、初中和高中阶段较高,大学阶段下降至最低。     

Autonomy and Relatedness among Chinese Sojourners and Applicants: Conflictual or Independent Predictors of Well-Being and Adjustment?

Self-Determination Theory argues that relatedness and autonomy represent innate and universally critical needs and that, when satisfied, both needs should yield an independent positive effect on well-being and adjustment for all individuals. In contrast, some cross-cultural perspectives suggest that the pursuit of autonomy hampers the development of satisfying relationships, and such conflicts might be especially problematic for the well-being of individuals in collectivistic societies that value social bonds over the pursuit of uniqueness and independence. The present study sampled Chinese students who had temporarily moved to Belgium to study (i.e., sojourners) and Chinese students involved in the application procedure to study in Belgium (i.e., applicants). Consistent with SDT, the present research shows that the basic psychological needs for autonomy, relatedness, and competence are positively interrelated, that the satisfaction of these three needs predicts unique variance in Chinese students’ psychological well-being, vitality, and depression (i.e., main effects), and that autonomy satisfaction yields a more beneficial effect on vitality and better protects against depressive feelings when relatedness satisfaction is low (i.e., an interaction effect). Finally, mean-level differences in well-being between Chinese sojourners and applicants could be fully accounted by differential need satisfaction.

Perceptual learning for speech: Is there a return to normal?

Recent work on perceptual learning shows that listeners' phonemic representations dynamically adjust to reflect the speech they hear (Norris, McQueen, & Cutler, 2003). We investigate how the perceptual system makes such adjustments, and what (if anything) causes the representations to return to their pre-perceptual learning settings. Listeners are exposed to a speaker whose pronunciation of a particular sound (either /s/ or /integral/) is ambiguous (e.g., halfway between /s/ and /integral/). After exposure, participants are tested for perceptual learning on two continua that range from /s/ to /integral/, one in the Same voice they heard during exposure, and one in a Different voice. To assess how representations revert to their prior settings, half of Experiment 1's participants were tested immediately after exposure; the other half performed a 25-min silent intervening task. The perceptual learning effect was actually larger after such a delay, indicating that simply allowing time to pass does not cause learning to fade. The remaining experiments investigate different ways that the system might unlearn a person's pronunciations: listeners hear the Same or a Different speaker for 25 min with either: no relevant (i.e., 'good') /s/ or /integral/ input (Experiment 2), one of the relevant inputs (Experiment 3), or both relevant inputs (Experiment 4). The results support a view of phonemic representations as dynamic and flexible, and suggest that they interact with both higher- (e.g., lexical) and lower-level (e.g., acoustic) information in important ways.     

A Tale of Two Cities: Replication of a Study on the Acculturation and Adaptation of Immigrant Adolescents From the Former Soviet Union in a Different Community Context

While a great deal of research has been conducted to understand acculturation and its relationship to adaptation in the new country, surprisingly little attention has been paid to the ways in which the characteristics of the local community impact these processes. The present study addresses this gap in the literature by exploring the potential role of community differences in the acculturation and adaptation processes of 269 refugee and immigrant adolescents from the former Soviet Union who resettled in two different community contexts. Specifically, a prior study on acculturation and adjustment among high school students (D. Birman, E. J. Trickett, & A. Vinokurov, 2002) was replicated with the same émigré population in a contrasting community within the same state. The contrast between these communities allowed us to test hypotheses emerging from an ecological perspective concerning (1) patterns of acculturation, (2) levels of discrimination and its effect on acculturative outcomes, and (3) community differences in the relationship between acculturation and outcomes. In addition to the focus on community differences, the study also employs a multidimensional measure of acculturation and assesses acculturation to both American and Russian culture. Furthermore, adaptation is assessed across different life domains; including peer relationships, family relationships, school adaptation, and psychological adaptation. Findings support the general ecological perspective, suggesting the importance of studying acculturation and adaptation as a reflexive process in which culture and context are very much intertwined.