Discriminating direction of motion trajectories from angular speed and background information

The effects of a background scene on the perception of the trajectory of an approaching object and its relation to changes in angular speed and angular size were examined in five experiments. Observers judged the direction (upward or downward) of two sequentially presented motion trajectories simulating a sphere traveling toward the observer at a constant 3-D speed from a fixed distance. In Experiments 1–4, we examined the effects of changes in angular speed and the presence of a scene background, with changes in angular size based either on the trajectories being discriminated or on an intermediate trajectory. In Experiment 5, we examined the effects of changes in angular speed and scene background, with angular size either constant or consistent with an intermediate 3-D trajectory. Overall, we found that (1) observers were able to judge the direction of object motion trajectories from angular speed changes; (2) observers were more accurate with a 3-D scene background, as compared with a uniform background, suggesting that scene information is important for recovering object motion trajectories; and (3) observers were more accurate in judging motion trajectories based on angular speed when the angular size function was consistent with motion in depth than when the angular size was constant.     

网络成瘾的认知神经科学研究述评

随着研究的深入,认知神经科学的技术和方法被越来越多地应用于网络成瘾的研究中.这些研究主要集中在对网络成瘾者的认知加工功能受损、注意偏向、认知加工倾向、抑制控制和感觉寻求以及网络成瘾的神经通路的研究.在此基础上指出了这些研究结果在探究网络成瘾的机制和实际应用中的价值,并提出未来的研究应该明确网络成瘾与高级认知功能损害的关系,整合现有的研究方法,扩大研究对象和研究指标,突出研究成果在网络成瘾鉴别和干预中的应用价值.     

情绪唤起对执行功能的作用

执行功能是对基本认知加工进行有意心理控制的所有高级认知过程.最近10年,情绪唤起对执行功能的作用机制吸引愈来愈多的研究兴趣,其中,消极情绪(尤其焦虑、抑郁)已被普遍证实损害执行功能的运行效率;积极情绪如何作用执行功能尚不明确.鉴于后者研究中的理论假设匮乏,近年兴起的积极情绪的扩展建构理论以及动机维度模型,能为理解积极情绪如何作用执行功能提供线索与启发.未来研究应深入探讨不同动机强度的积极及消极情绪对执行功能的作用机制,在这之中也应细致区分情绪唤起与情绪刺激的不同效应.     

类别学习中的认知学习机制

采用归类任务,比较不同知识条件、不同特征呈现方式下,对非定义特征维度的掌握,验证类别学习的认知学习机制。结果发现对非定义特征维度的掌握,在样例特征固定位置呈现条件下较多,而在样例特征随机呈现条件下较少;在知识定义特征维度条件下较多,而在机械定义特征维度条件下较少。研究结果支持了类别学习的认知学习机制。     

Self-Concept and Sociometric Outcomes: A Comparison of Only Children and Sibling Children From Urban and Rural Areas in the People's Republic of China

We investigated differences in self-concept between 360 only children and 555 sibling children in the sixth grade of three urban schools and three rural schools in the People's Republic of China. Peer perceptions and teacher perceptions were also collected using sociometric measures. Self-concept was determined by the Self-Perception Profile for Children (Harter, 1985). Comparisons of sibling children and only children showed no differences on self-concept; however, urban residents had higher self-concept scores than children from rural areas, and boys scored higher than girls. No significant interaction effects between sibling status, gender, and residence were found.     

An Idiographic Examination of Day-to-Day Patterns of Substance Use Craving,Negative Affect,and Tobacco Use Among Young Adults in Recovery

Psychological constructs, such as negative affect and substance use cravings that closely predict relapse, show substantial intraindividual day-to-day variability. This intraindividual variability of relevant psychological states combined with the “one day at a time” nature of sustained abstinence warrant a day-to-day investigation of substance use recovery. This study examines day-to-day associations among substance use cravings, negative affect, and tobacco use among 30 college students in 12-step recovery from drug and alcohol addictions. To account for individual variability in day-to-day process, it applies an idiographic approach. The sample of 20 males and 10 females (mean age = 21) was drawn from members of a collegiate recovery community at a large university. Data were collected with end-of-day data collections taking place over an average of 26.7 days. First-order vector autoregression models were fit to each individual predicting daily levels of substance use cravings, negative affect, and tobacco use from the same 3 variables 1 day prior. Individual model results demonstrated substantial interindividual differences in intraindividual recovery process. Based on estimates from individual models, cluster analyses were used to group individuals into 2 homogeneous subgroups. Group comparisons demonstrate distinct patterns in the day-to-day associations among substance use cravings, negative affect, and tobacco use, suggesting the importance of idiographic approaches to recovery management and that the potential value of focusing on negative affect or tobacco use as prevention targets depends on idiosyncratic processes.     

Reduced repetition suppression in the occipital visual cortex during repeated negative Chinese personality‐trait word processing

Reduced neural activation have been consistently observed during repeated items processing, a phenomenon termed repetition suppression. The present study used functional magnetic resonance imaging (fMRI) to investigate whether and how stimuli of emotional valence affects repetition suppression by adopting Chinese personality‐trait words as materials. Seventeen participants were required to read the negative and neutral Chinese personality‐trait words silently. And then they were presented with repeated and novel items during scanning. Results showed significant repetition suppression in the inferior occipital gyrus only for neutral personality‐trait words, whereas similar repetition suppression in the left inferior temporal gyrus and left middle temporal gyrus was revealed for both the word types. These results indicated common and distinct neural substrates during processing Chinese repeated negative and neutral personality‐trait words.     

扁鹊取意“病却”考

扁鹊是中国医学史上的一个重要名人。人们对扁鹊的认识多来源于《史记·扁鹊传》,篇中撰写的主人公有实有虚,即扁鹊可以指称具体的某一位医生,亦可泛称众良医。在汉画像石中,扁鹊形象奇特,人面鹊身,是一个抽象化的人物。解读两种文献材料,扁鹊应该为古代良医之公名,而非确指某个固定的人。扁鹊一名的内涵,因声求义,扁鹊与“病却”古音相似,此名当取义于“病却”,以此寓神医之德,寄托病人的心愿。把神医命名为“病却”既合人们的愿望,又合古人命名的法则。     

高压氧医学与康复医学的协同发展

随着医学理论与实践的不断创新和发展,中国也正在努力寻求一种具有中国特色的现代医学发展模式.高压氧医学与康复医学都是新兴的边缘交叉性学科,具有广阔的发展潜能和空间;然而,两者在快速发展的同时也突显了一些问题,如:后续动力不足、发展方向不明确等.本文从哲学中联系与发展的角度出发,通过机制探讨及发展趋势的分析,试图寻找两者共同发展的结合点,为推动康复医学与高压氧医学在临床工作中的继续向前发展提供一种借鉴与参考.     

当事人眼中的团体辅导效果：基于协商一致的质性研究

目的：本文从当事人的视角,深入研究团体辅导对于团体成员所产生的作用。方法：采用协商一致的质性研究（CQR）方法,对15个来自不同团体的当事人的深度访谈材料进行分析。结果：发现与团体辅导效果相关的域有4个,即团体辅导的过程效果、团体辅导效果获得的过程和体验、团体辅导效果的影响因素,团体辅导的后续效果。结论：当事人眼里团体辅导效果的内容广泛且丰富,团体依恋既是团体辅导效果的内容也是基础性的疗效因子。