歧视知觉对初中生的合作倾向与行为的影响

本文通过两个研究揭示歧视知觉对初中生合作倾向与行为的影响, 研究1采用问卷法对752名初中生进行为期一年的追踪, 运用潜变量交叉滞后结构方程模型分析歧视知觉与合作倾向之间的纵向预测关系; 研究2采用动态公共物品困境实验考察歧视知觉对合作行为的影响, 以及群体类型的调节作用。结果发现：(1)初中生的歧视知觉与合作倾向存在显著负相关; T1合作倾向可负向预测T2歧视知觉, T2歧视知觉可负向预测T3合作倾向; (2)在公共物品困境前三轮投资比和贡献率上, 歧视知觉和群体类型的交互效应显著; 而在后三轮仅发现歧视知觉在投资比和贡献率上的主效应, 以及群体类型在贡献率上的主效应。以上结果表明, 歧视知觉与合作倾向之间存在纵向螺旋式影响; 歧视知觉对前期合作行为的影响受到群体类型的调节, 但随着互动时间延长, 该调节作用消失。     

Dorsolateral prefrontal cortex mediates working memory processes in motor skill learning

Neuroimaging studies have shown that the dorsolateral prefrontal cortex (DLPFC) is recruited during motor skill learning, which suggests the involvement of the DLPFC in working memory (WM) processes, such as selection and integration of motor representations temporarily stored in WM. However, direct evidence linking activation of the DLPFC to WM storage and manipulation during motor skill learning in real-time is rare. In this study, we conducted two experiments to investigate the causal role of DLPFC activity in WM storage and manipulation during motor skill learning under low and high WM-demand conditions. Participants received continuous theta burst stimulation (cTBS) and sham stimulation (crossover design) over the left DLPFC (experiment 1) or right DLPFC (experiment 2). Before and after stimulation, participants in both experiments performed a sequential finger-tapping (SFT) task containing repeated sequence (low-WM demand) and non-repeated sequence (high-WM demand) conditions which are used to study WM processes. The number of correct sequences (NoCS) and reproduction error rate were analyzed. Learning gains in NoCS improved significantly with the practice for both sequence types in the presence of either stimulation type. Compared to sham stimulation, cTBS over the left DLPFC resulted in significantly reduced learning gains in NoCS for non-repeated sequences. These results suggest that the left DLPFC contributes to WM manipulation during motor skill learning.     

想象性群际接触对合作行为的影响：内隐性别偏见的中介作用

为考察想象性群际接触对内隐性别偏见与合作行为的影响,采用单类内隐联想测验（SC-IAT）和三种合作范式进行了两个实验。结果发现：与对照组相比,（1）积极想象性接触能显著降低不同性别个体对异性的内隐性别偏见。（2）积极想象性接触仅能显著增加个体在囚徒困境中的合作行为,内隐性别偏见起部分中介作用。结果表明,积极想象性接触既能减少个体对异性群体的内隐性别偏见,并可进一步促进两人情境中与异性间的合作行为。     

来自屏幕的纽带：视频聊天与儿童发展

随着近几年视频聊天的兴起, 越来越多的研究者开始探索视频聊天对儿童发展的影响。相较于传统通讯技术, 视频聊天具备了视听结合与即时互动的特征; 但同时, 作为数字媒体, 视频聊天仍然保持了传统屏幕媒体二维性的特征。汇总以往视频聊天与儿童学习的实证研究发现, 与录制视频教学比较, 视频聊天在婴幼儿词汇学习(d = 0.33)和动作学习(d = 0.90)上的教学效果更佳; 同时, 视频聊天也能够使婴幼儿在教学过程中保持较高的注意水平(d = 0.90)。视频聊天对儿童远距离亲子关系和同伴关系上均有一定的促进作用。视频聊天也可以作为一种辅助治疗手段应用于特殊儿童的干预中。未来研究仍需关注扩大视频聊天学习中儿童被试的年龄范围、共同观看者的不同支持行为对儿童视频聊天学习的效果产生的影响。     

阅读方式和学习次数对中文词汇的产生效应影响的发展研究

产生效应指朗读单词的记忆成绩要好于默读单词的记忆成绩。采用“学习-再认”的实验范式,以小学三年级、小学五年级、初一、初二和大学生为被试,采用2（阅读方式：朗读,默读）×2（学习次数：1次,3次）×5（年级：三年级,五年级,初一,初二,大学）的混合设计,探讨中文词汇产生效应的发展特点。结果发现：（1）年级的主效应显著,大学生的记忆成绩显著高于三年级、五年级和初一学生的;五年级、初一和初二学生的记忆成绩显著高于三年级学生的;（2）阅读方式的主效应显著,朗读的记忆成绩显著高于默读的;（3）学习次数的主效应显著,3次的记忆成绩显著高于1次的;（4）阅读方式和年级的交互作用显著,在朗读的记忆成绩上,小学三年级的与大学生的差异显著,但小学五年级、初一、初二学生的和大学生的差异均不显著,说明朗读的记忆成绩在小学五年级趋于成熟;在默读的记忆成绩上,小学三年级、五年级、初一学生的均与大学生的差异显著,初二学生的与大学生的无显著差异,表明默读的记忆成绩在初二年级趋于成熟。初一学生的产生效应大小与大学生的无差异。研究结果支持产生效应的特异观。     

The Shared Values of Humanity and Its Philosophical Implications: From the Perspective of Civilization

The concept of the shared values of humanity, embodying the spirit of putting people first and solving real-life problems, is of great significance for constructing a new global order and building a human community with a shared future. The shared values of humanity respect the differences in understanding and realization paths of different civilizations, and seek common grounds with an inclusive and open attitude. The core socialist values are an embodiment and an extension of the shared values of humanity. The fine traditional Chinese culture has also laid a profound cultural basis for the pursuit of the shared values of humanity, enabling us to make up a better scheme for building a human community with a shared future from the perspective of civilization.     

The function of wisdom dimensions in ego‐identity development among Chinese university students

This study investigates the relationship between wisdom and ego‐identity among university students in China. Using Marcia's ego‐identity statuses and Ardelt's wisdom dimensions as the theoretical and conceptual framework, the study investigates 356 university students in China. After exploratory and confirmatory factor analyses, four factors from wisdom and five factors from ego‐identity were retrieved. A structural equation model was then conducted to analyse the relationships. The findings were: (1) among wisdom dimensions, cognitive, and reflective wisdom, especially perspective‐taking best predicted achievement, (2) all three dimensions of wisdom predicted moratorium, but reflective wisdom was the most pronounced predictor, (3) all three dimensions of wisdom predicted diffusion, but resentment items from reflective wisdom were the most pronounced predictors, and (4) gender was a significant predictor of ego‐identity achievement and diffusion. These findings suggest that efforts to build reflective wisdom might contribute to healthier ego‐identity formation.     

Distributional learning has immediate and long-lasting effects

Evidence of distributional learning, a statistical learning mechanism centered on relative frequency of exposure to different tokens, has mainly come from short-term learning and therefore does not ostensibly address the development of important learning processes. The present longitudinal study examines both short- and long-term effects of distributional learning of phonetic categories on non-native sound discrimination over a 12-month period. Two groups of listeners were exposed to a two-minute distribution of auditory stimuli in which the most frequently presented tokens either approximated or exaggerated the natural production of the speech sounds, whereas a control group listened to a piece of classical music for the same length of time. Discrimination by listeners in the two distribution groups improved immediately after the short exposure, replicating previous results. Crucially, this improvement was maintained after six and 12 months, demonstrating that distributional learning has long-lasting effects.     

Conscious awareness of action potentiates sensorimotor learning

Many everyday skills are unconsciously learned through repetitions of the same behaviour by binding independent motor acts into unified sets of actions. However, our ability to be consciously aware of producing newly and highly trained motor skills raises the question of the role played by conscious awareness of action upon skill acquisition. In this study we strengthened conscious awareness of self-produced sequential finger movements by way of asking participants to judge their performance in terms of maximal fluency after each trial. Control conditions in which participants did not make any judgment or performance-unrelated judgments were also included. Findings indicate that conscious awareness of action, enhanced via subjective appraisal of motor efficiency, potentiates sensorimotor learning and skilful motor production in optimising the processing and sequencing of action units, as compared to the control groups. The current work lends support to the claim that the learning and skilful expression of sensorimotor behaviours might be grounded upon our ability to be consciously aware of our own motor capability and efficiency.     

A hierarchy of cortical responses to sequence violations in three-month-old infants

The adult human brain quickly adapts to regular temporal sequences, and emits a sequence of novelty responses when these regularities are violated. These novelty responses have been interpreted as error signals that reflect the difference between the incoming signal and predictions generated at multiple cortical levels. Do infants already possess such a hierarchy of violation-detection mechanisms? Using high-density recordings of event-related potentials during an auditory local–global violation paradigm, we show that three-month-old infants process novelty in temporal sequences at two distinct levels. Violations of local expectancies, such as perceiving a deviant vowel “a” after repeated presentation of another vowel i-i-i, elicited an early auditory mismatch response. Conversely, violations of global expectancies, such as hearing the rare sequence a-a-a-a instead of the frequent sequence a-a-a-i, modulated this early mismatch response and led to a late frontal negative slow wave, whose cortical sources included the left inferior frontal region. These results suggest that the infant brain already possesses two dissociable systems for temporal sequence learning.