Effects of interlimb practice on coding and learning of movement sequences

An interlimb practice paradigm was designed to determine the role that visual–spatial (Cartesian) and motor (joint angles, activation patterns) coordinates play in the coding and learning of complex movement sequences. Participants practised a 16-element movement sequence by moving a lever to sequentially presented targets with one limb on Day 1 and the contralateral limb on Day 2. Practice involved the same sequence with either the same visual–spatial or motor coordinates on the two days. A unilateral practice condition (control) was also tested where both coordinate systems were changed but the same limb was used. Retention tests were conducted on Day 3. Regardless of the order in which the limbs were used during practice, results indicated that keeping the visual–spatial coordinates the same during acquisition resulted in superior retention. This provides strong evidence that the visual–spatial code plays a dominant role in complex movement sequences, and this code is represented in an effector-independent manner.     

An investigation of the interaction between cognitive style and context reinstatement on the memory performance of eyewitnesses

The power of context reinstatement to improve recall is well established, but the degree of effect obtained varies widely between studies. Exploring possible causes for this variation, this paper examines the relationship between cognitive style and the efficacy of context reinstatement in improving free and cued recall in an eyewitness paradigm. Experiment 1, using a live staged event and a 1 week delay, indicated a significant improvement in free recall with the reinstatement of context and, as expected, no such improvement in cued recall. However, analysis of the data according to field dependency, as measured by Witkin, Oltman, Raskin, and Karp's [A manual for the Embedded Figures Test (1971) Palo Alto, CA: Consulting Psychologists Press] Group Embedded Figures Test (GEFT) revealed that, in free recall, field dependent witnesses' scores improved significantly with context reinstatement, whilst the scores of field independent witnesses did not. In cued recall, however, the field independent witnesses scored significantly higher overall than field dependent witnesses. Experiment 2 sought replication of these findings again utilised the GEFT and the Riding [Cognitive Styles analysis (1991) Birmingham: Learning and Training Technology] Cognitive Styles Analysis (CSA). Analysis of the data according to the Wholist-Analytic (W-A) dimension of the CSA, indicated no interaction with either context reinstatement or memorial performance. However the GEFT analysis produced similar results to that obtained in Experiment 1. The meaning of the interaction between the GEFT and both free and cued recall, and the failure of the CSA to similarly interact are discussed, together with the implication of these findings for establishing the value of reinstating context for individual eyewitnesses.     

A test for conditional independence between response time and accuracy

An important distinction between different models for response time and accuracy is whether conditional independence (CI) between response time and accuracy is assumed. In the present study, a test for CI given an exponential family model for accuracy (for example, the Rasch model or the one‐parameter logistic model) is proposed and evaluated in a simulation study. The procedure is based on the non‐parametric Kolmogorov–Smirnov tests. As an illustrative example, the CI test was applied to data from an arithmetics test for secondary education.     

Dissimilar effects of task‐relevant and interpersonal threat on independent–interdependent self‐construal in individuals with high self‐esteem

Previous research has indicated that individuals with high trait self‐esteem (HSEs) become more independent and less interdependent after experiencing a task‐relevant threat. However, these studies have not investigated other sources of ego threats, such as interpersonal threats. Therefore, the moderating effects of the degree of trait self‐esteem on task‐relevant and interpersonal ego threats were investigated in relation to independent, or interdependent self‐construal. It was predicted that in HSEs, the level of task‐relevant stress would be positively–negatively related to their independence–interdependence, whereas the level of interpersonal stress would be negatively–positively related to their independence–interdependence. In individuals with low trait self‐esteem (LSEs), the two types of stresses and independent–interdependent self‐construal may not have a significant relationship. We conducted a questionnaire survey with undergraduates. Correlational analysis of the results indicated that in HSEs, greater task‐relevant stress was related to heightened independence, whereas greater interpersonal stress had the opposite effect, indicating lower independence and heightened interdependence. However, these stresses were not related to the self‐construal of LSEs. These findings suggest that task‐relevant and interpersonal threat could have differential effects on independent and interdependent self‐construal for HSEs, but not in LSEs.     

基于开放医疗大数据的人工智能研究

医疗人工智能（artificial intelligence, AI）的发展离不开大数据的汇聚与标注,同时也引发了医疗大数据及其标注标准如何统一的问题。从AI发展对医疗大数据需求出发,指出建立医疗大数据统一标准的重要性与必要性,分析当前医疗AI技术的开发过程缺乏数据统一标准和临床共识,提出“以开放换取共识”的医疗大数据平台方案——素问系统,实现“算法工程师开发技术—临床医生编辑知识—伦理专家监控伦理”的一体化AI生产流程。最后,以素问系统中第一个开源项目——医学知识图谱,作为大数据抽取标准知识的案例,解析了如何以开放换取共识,让AI技术专家与临床专家共同打造可落地的医疗AI技术。

     

Liberal–conservative dimension of moral concerns underlying political faction formation in Taiwan

Moral foundations theory provides a framework for understanding the traditional liberal–conservative dichotomy in political factions. Typically, factions on the liberal side are more concerned with individualizing foundations—including care/harm and fairness/cheating—for the protection of individual rights and welfare whereas factions on the conservative side are concerned with both individualizing and binding foundations—including loyalty/betrayal, authority/subversion, and sanctity/degradation—for the maintenance of existing social ethics. Our research extended this framework to the analysis of Taiwanese political factions, which are not distributed conspicuously along the liberal–conservative line but instead on whether Taiwan should become a legally independent state or unify with the People's Republic of China (Mainland China). Our results indicate that despite the scarce use of the terms liberal or left and conservative or right in common communication, a liberal–conservative dimension underlies the Taiwanese political spectrum. Specifically, supporters of Taiwan independence exhibit liberal‐like moral concerns whereas supporters of China unification and the status quo demonstrate conservative‐like moral concerns. Moreover, indirect effects exist through moral foundations from political factions to stances on social issues; this is especially prevalent in the case of Taiwan independence camp's clear support for the legalization of same‐sex marriage, a stance resulting from anti‐authoritarian moral and political characteristics.     

Successive independence and behavioral contrast in a closed economy.

Two pigeons had access to multiple concurrent schedules of reinforcement for 24 hours per day in their home cages. The variable-interval schedules comprising the multiple concurrent schedules were varied across 16 conditions. In three sets of conditions, one schedule was varied while its concurrent alternative and the concurrent schedules in the other component were held constant. Behavioral contrast was observed; that is, as the rate of reinforcement arranged by the varied schedule decreased, response rates on the constant schedules typically increased. These conditions formed part of two larger sets of conditions in which the concurrent schedules in one multiple-schedule component remained constant while the concurrent schedules in the other component were varied. Successive independence was found, in that behavior allocation during the constant component did not vary as a function of the reinforcer ratios in the varied component. Successive independence between components in multiple concurrent schedules is a robust result that occurs in closed economies and under conditions that promote behavioral contrast.     

认知风格对不同类型几何问题解决的影响

通过镶嵌图形测验（EFT）,在初中学生中选了不同认知风格的被试,限时考查被试对不同类型几何问题的解决。结果表明：新问题与所学内容相似性会影响中学生几何问题解决的成绩;认知风格不同类型在几何问题解决中存在显著差异,在与所学内容相似性高的新问题解决中,场依存性学生的成绩显著地高于场独立性的学生。     

五岁儿童自主性与权威认知的相关研究

本研究采用实验室观察法对五岁儿童自主性与权威认知之间的关系进行探讨。结果表明:(1)五岁儿童自主性与权威认知间相关显著,权威认知水平高的儿童自主性发展水平高,权威认知水平低的儿童自主性发展水平低;(2)五岁儿童权威认知与自主性三个维度间相关均显著。权威认知水平高的儿童,其自我依靠、自我控制和自我主张水平高;权威认知水平低的儿童,其自我依靠、自我控制和自我主张水平低。