Automatic imitation of intransitive actions

Previous research has indicated a potential discontinuity between monkey and human ventral premotor-parietal mirror systems, namely that monkey mirror systems process only transitive (object-directed) actions, whereas human mirror systems may also process intransitive (non-object-directed) actions. The present study investigated this discontinuity by seeking evidence of automatic imitation of intransitive actions--hand opening and closing--in humans using a simple reaction time (RT), stimulus-response compatibility paradigm. Left-right and up-down spatial compatibility were controlled by ensuring that stimuli were presented and responses executed in orthogonal planes, and automatic imitation was isolated from simple and complex orthogonal spatial compatibility by varying the anatomical identity of the stimulus hand and response hemispace, respectively. In all conditions, action compatible responding was faster than action incompatible responding, and no effects of spatial compatibility were observed. This experiment therefore provides evidence of automatic imitation of intransitive actions, and support for the hypothesis that human and monkey mirror systems differ with respect to the processing of intransitive actions.     

科学研究始于机会,还是始于问题或观察?

With the recent rise of the philosophy of scientific practices, SSK (Sociology of Scientific Knowledge), and feminist approaches to the philosophy of science, a new perspective is gradually coming into being, holding that the starting point for scientific research is opportunity. Opportunistic features in solar neutrino experiments, Opportunistic features of complexity studies emerging from economics, and the measurement of insects’ flight can prove the above perspective from different angels. It is important and significant to determine whether the starting point for scientific research is opportunity, a problem, or an observation. Translated by Tian Xiaofei from Zhexue Yanjiu 哲学研究 (Philosophical Research), 2007, (1): 98–104     

An empirical investigation of the statistical properties of generalized single-case randomization tests

Adapting Edgington's [J. Psychol. 90 (1975) 57] randomly determined intervention start-point model, Levin and Wampold [Sch. Psychol. Quart. 14 (1999) 59] proposed a set of nonparametric randomization tests for analyzing the data from single-case designs. In the present study, the performance of Levin and Wampold's four basic tests (independent start-point general and comparative effectiveness, simultaneous start-point general and comparative effectiveness) was examined with respect to their Type I error rates and statistical power. Of Levin and Wampold's four tests, all except the independent start-point comparative effectiveness test maintained their empirical Type I error rates and had acceptable power at larger sample-size and effect-size combinations. The one-tailed comparative intervention effectiveness test for the independent start-point model was found to be too liberal, in that it did not maintain its Type I error rate. Although a two-tailed application of that test was found to be conservative at longer series lengths, it had acceptable power at larger sample-size and effect-size combinations. The results support the utility of a versatile new class of single-case designs that permit both within- and between-unit statistical assessments of intervention effectiveness.     

在家庭自由游戏和智力任务游戏中儿童与母亲的交往行为特征

本研究采用家庭录像观察的方法,考察了61名3－4岁儿童在家庭环境中的两个情境－－自由和带有智力任务倾向的拼图游戏情境中所表现出来的行为特征,结果发现：1儿童在两种游戏情境中与母亲交往时所表现出来的行为特征可以从独立性、顺从、言语交流和参与四个维度进行评价。2当儿童的游戏从自由游戏转为带有智力任务倾向的游戏时,儿童与母亲的交往行为方式发生明显变化,交流行为和积极情绪明显减少,而依赖行为和不与母亲交流的行为显著增加。3在上述两种游戏情境中,儿童与母亲的交往行为表现出个别差异,在自由游戏情境中,42.6%为独立型、32.8%为顺从型和24.6%为交流型;在拼图游戏情境中,54％为独立型、23％为顺从型和23％不顺从型。     

Social Competence at the Playground: Preschoolers During Recess

Social interactions at the playground have been represented as a rich learning opportunity to hone and master social skills at preschool years. Specifically, all forms of social play (fantasy, role, exercise or rough‐and‐tumble) have been related to children's social competence. The main goal of this study was to examine whether it is a certain kind of social play which facilitates the development of social competence, or if it is just the opportunity for interacting during recess that provides children with an optimal environment for social learning. A total of 73 preschoolers (4–6 years old) were videotaped at the school's playground. Teachers provided assessments of children's social competence. Children's interactions at the playground were assessed through an innovative measuring method, based on radio‐frequency identification devices. The results showed a positive association between exercise play and children's social competence. In contrast with the literature, both forms of pretend play, fantasy and role play were unrelated to children's social competence. Smaller peer groups and longer interactions also demonstrated a positive association with these preschoolers' social competence. The study shows the importance of outdoor physical play for preschoolers' social success. Moreover, the study suggests that the environment in which children play has an important effect on the adaptive nature of their play. Copyright © 2016 John Wiley & Sons, Ltd.     

Learning to use novel objects: a training study on the acquisition of novel action representations

Many studies have suggested that the motor system is organized in a hierarchical fashion, around the prototypical end location associated with using objects. However, most studies supporting the hierarchical view have used well-known actions and objects that are highly over-learned. Accordingly, at present it is unclear if the hierarchical principle applies to learning the use of novel objects as well. In the present study we found that when learning to use a novel object subjects acquired an action representation of the end location associated with using the object, as evidenced by slower responses in an action observation task, when the object was presented at an incorrect end location. By showing the importance of knowledge about end locations when learning to use a novel object, the present study suggests that end locations are a fundamental organizing feature of the human motor system.     

The self in action effects: selective attenuation of self-generated sounds

The immediate experience of self-agency, that is, the experience of generating and controlling our actions, is thought to be a key aspect of selfhood. It has been suggested that this experience is intimately linked to internal motor signals associated with the ongoing actions. These signals should lead to an attenuation of the sensory consequences of one’s own actions and thereby allow classifying them as self-generated. The discovery of shared representations of actions between self and other, however, challenges this idea and suggests similar attenuation of one’s own and other’s sensory action effects.Here, we tested these assumptions by comparing sensory attenuation of self-generated and observed sensory effects. More specifically, we compared the loudness perception of sounds that were either self-generated, generated by another person or a computer. In two experiments, we found a reduced perception of loudness intensity specifically related to self-generation. Furthermore, the perception of sounds generated by another person and a computer did not differ from each other. These findings indicate that one’s own agentive influence upon the outside world has a special perceptual quality which distinguishes it from any sort of external influence, including human and non-human sources. This suggests that a real sense of self-agency is not a socially shared but rather a unique and private experience.     

对肿瘤研究的思考：观测与结果

从哲学的角度,对肿瘤研究中的常用方法即观测与测定进行了理性的思考,探讨理论背景、观测仪器和测量过程对观测和测量的结果存在影响,肿瘤发生机理的基因异常理论的片面性,提出肿瘤发生的非平衡自组织观点、亚细胞水平成分测不准的可能性和肿瘤细胞及机体研究的黑箱方法。     

Observing home-visit quality with the home visit rating scales: Introduction to the special section

Evidence-based home-visiting programs aim to address one of the most important challenges facing our species—setting the next generation on a healthy path of development that prepares them for a future that is simultaneously uncertain and promising. Diverse research literatures have pointed to practices to effectively meet this challenge and better achieve the unfulfilled promise of home visiting by more effectively engaging parents in supporting their children's early development and well-being. Measures of home-visit quality practices drawn from social work, pediatric nursing, early childhood, and early intervention research literatures have identified building relationships with families and focusing on their strengths as effective, practices that are particularly important for vulnerable families. The articles in this special section used the Home Visit Rating Scales to examine stability in home-visit quality over time, study specific home-visiting processes linked with quality, validate a supervisor checklist of home-visiting implementation, and consider the home visit in relation to an array of indicators reflecting overall home-visiting program strength and stability. These articles exemplify progress in home-visiting research over recent decades, including advances in direct observational methods and measurement as well as examinations of home visiting as an observable process across various home-visiting program models and populations.     

Evaluating motion detection to score sleep disturbance for children: A translational approach to developing a measurement system

Information obtained via direct observation of children's sleep disturbance throughout the night in their home can guide the assessment and treatment process, but watching live or via recorded video might be impractical in terms of time expenditures. In Experiment 1, we assessed the accuracy and reliability of a motion‐detection camera with human motor movements. In Experiment 2, we tested the system's generality by using it to obtain in‐home measures of sleep disturbance for three children with autism spectrum disorder and compared the accuracy to a continuous measurement system. We also measured scoring efficiency and assessed parents' acceptability of the camera. Results provide preliminary support for motion detection in measuring sleep disturbance, but further evaluation of motion detection to improve accuracy is warranted.