Motor Skill Learning and the Development of Visual Perception Processes Supporting Action Identification

This study examined physical training and observational training influences on motor learning and the development of visual discrimination processes. Participants were trained on a bimanual task (relative phase of +90°) defined by a visual training stimulus. There were 2 observational contexts: 1) model-only, watch a learning model, and 2) stimulus-only, watch the visual training stimulus. After 2 d of training, the learning models performed the +90° pattern with reduced error in 2 retention tests. Each observer group showed improvement in performance of the +90° pattern, with the stimulus-only group characterized by a more significant improvement. The learning models and observer groups were characterized by an improvement in visually discriminating 2 features of the trained pattern, relative phase and hand-lead. Overall, physical practice (learning models) established a stronger link between the action and visual discrimination processes compared with the observational contexts. The results show that the processes supporting action production and the visual discrimination of actions are modified in ways specific to the trained action following both physical and observational training.     

Necessity and Relative Contingency

The paper introduces a contingential language extended with a propositional constant τ axiomatized in a system named KΔτ , which receives a semantical analysis via relational models. A definition of the necessity operator in terms of Δ and τ allows proving (i) that KΔτ is equivalent to a modal system named K□τ (ii) that both KΔτ and K□τ are tableau-decidable and complete with respect to the defined relational semantics (iii) that the modal τ -free fragment of KΔτ is exactly the deontic system KD. In §4 it is proved that the modal τ -free fragment of a system KΔτw weaker than KΔτ is exactly the minimal normal system K. Presented by Daniele Mundici     

IS MATCHING INNATE?

Experimentally naive mice matched the proportions of their temporal investments (visit durations) in two feeding hoppers to the proportions of the food income (pellets per unit session time) derived from them in three experiments that varied the coupling between the behavioral investment and food income, from no coupling to strict coupling. Matching was observed from the outset; it did not improve with training. When the numbers of pellets received were proportional to time invested, investment was unstable, swinging abruptly from sustained, almost complete investment in one hopper, to sustained, almost complete investment in the other-in the absence of appropriate local fluctuations in returns (pellets obtained per time invested). The abruptness of the swings strongly constrains possible models. We suggest that matching reflects an innate (unconditioned) program that matches the ratio of expected visit durations to the ratio between the current estimates of expected incomes. A model that processes the income stream looking for changes in the income and generates discontinuous income estimates when a change is detected is shown to account for salient features of the data.     

不同教师群体激励因素的比较研究

本研究选择云南曲靖和浙江宁波的两所师范学校作为研究对象,以教育人种学研究方法为基本方法,通过现象分析、个案访谈、问卷调查、文献分析等途径,对不同地区教师群体的工作积极性状态及其原因进行了实证性对比研究,得出以下结论:竞争压力和相对报酬之间的相互关系是决定不同教师群体工作积极性大小的两个关键因素。其中竞争因素的激励功能相对较强。竞争压力大小与相对报酬高低之间的相互关系影响着群体激励力量的大小。     

似然性、必然性和恒等:一种相对似然性逻辑

We construct a Hilbert style system RPL for the notion of plausibility measure introduced by Halpern J, and we prove the soundness and completeness with respect to a neighborhood style semantics. Using the language of RPL, we demonstrate that it can define well-studied notions of necessity, conditionals and propositional identity. The paper is partially supported by a project (No. 05JJD720. 40001) granted by the Key Research Institutes for Humanities and Social Sciences of Chinese Ministry of Education.     

The Determinants of a Quality of Life Indicator for Farm Operator Households: Application of Zero-Inflated Count-Data Models

The assessment of the determinants of quality of life in the USA has long been a focus of many researchers. This paper contributes towards that effort by focusing on the quality of life attributes of a segment of the population; namely, farm operator households. To assist in this effort, a quality of life indicator is constructed based on data from the 2004 Agricultural Resource Management Survey along with some auxiliary databases. The determinants of this indicator have been assessed by means of count-data models with special emphasis being given to the role of the preponderance of zeros in the constructed index. Based on the findings, some policy recommendations on how to improve the quality of life in the rural communities are provided.

Income inequality and interpersonal trust in China

Two studies investigated the cross‐temporal and cross‐sectional associations between income inequality and interpersonal trust in China. In Study 1, a cross‐temporal meta‐analysis involving 141 studies (N = 64,853) found that Chinese college students’ scores on the Interpersonal Trust Scale (Rotter, 1967) decreased 0.54 SD from 1998 to 2016, and that the decline in interpersonal trust across birth cohorts was explained by earlier income inequality index in China. In Study 2, a cross‐regional analysis showed that Chinese citizens in provinces with more income inequality (vs. less inequality) perceived the local government to be less trustworthy and, in turn, reported lower levels of interpersonal trust. These findings contribute to the understanding of the rising income inequality as an explanation for the waning interpersonal trust in China, and point to a crucial channel connecting income inequality with interpersonal trust.     

Homicide and property crime: The relationships to anomie

Sociological explanations of crime have given considerable attention to Merton's anomie theory without systematically testing it. This paper tests Merton's theory through operationalizing anomie in terms of the degree of inequality in the distribution of income in each of the 50 states. A multiple regression analysis determines that while income inequality is significantly related to the rate of homicide, it is not significantly related to the rate of property crime. A preliminary cross-national analysis of 20 nations replicates this same general finding. The results suggest that a relatively large gap between material success and the means to success is likely to result in crimes of violence rather than property crime once we control the influence of other variables.     

家庭收入与儿童早期的社会能力：中介效应与调节效应

以325名幼儿为被试,收集母亲报告的家庭人均月收入、儿童一般社会能力和家庭环境,及教师报告的师生关系,考察了家庭收入在儿童早期社会能力中的作用,及家庭社会文化环境在其中的中介作用和家庭情感环境在其中的调节作用。结果发现：(1) 高收入家庭儿童的一般社会能力及师生关系质量显著高于低收入家庭的儿童;(2) 在家庭收入对儿童一般社会能力的预测中,家庭社会文化环境中的智力-文化取向与社交-娱乐取向均发挥了中介作用,家庭情感环境中的控制性发挥了调节作用,且家庭智力-文化取向的中介作用受到了家庭控制性的调节;(3) 在家庭收入对师生关系质量的预测中,家庭情感环境中的控制性和矛盾性发挥了调节作用。     

Tax communication and social influence: evidence from a British sample

An in‐depth, semi‐structured, interview study was conducted with 23 British employed and self‐employed taxpayers in various occupations. The study points to factors discouraging tax communication and proposes social norms as an alternative way of investigating social influence on taxpaying behaviour. Copyright © 1999 John Wiley & Sons, Ltd.