Observation and analysis of large-scale human motion

Many team sports include complex human movement, which can be observed at different levels of detail. Some aspects of the athlete's motion can be studied in detail using commercially available high-speed, high-accuracy biomechanical measurement systems. However, due to their limitations, these devices are not appropriate for studying large-scale motion during a game (for example, the motion of a player running across the entire playing field). We describe an alternative approach to studying such large-scale motion, and present a video-based, computer-aided system, developed specifically for the purpose of acquiring large-scale motion data. The baseline of our approach consists of sacrificing much of the spatial accuracy and temporal resolution of widely used biomechanical measurement systems, to obtain data on human movement that span large areas and long intervals of time. Data can be obtained for each of the observed athletes with reasonable amount of operator work. The system was developed using the recordings of a handball match. Several field tests were performed to assess measurement error, including comparison to one of the widely available biomechanical measurement systems. With the help of the system presented, we could obtain position data for all 14 handball players on a 40 x 20 m large court with RMS error better than 0.6 m, covering 1 h of action. Several results, obtained during the handball match study are presented, in order to highlight the importance of large-scale motion acquisition.     

青州城历史城市地理的初步研究——以广县城与广固城为研究重心

青州城市建成区一带,历史时期曾经先后存在四座城市,即广县城——广固城——东阳城或南阳城——满城。广县城,西汉时期既已存在,之所以产生于下圈村一带,关键在于其地地处高阜,不宜受到洪水侵袭,且南倚含水丰富的岩层,无缺水之虞。广固城建于魏晋十六国时期,因时逢乱世,地理上重军事防御的色彩明显。由临淄城而广固城,历史时期青齐地区实现了第一次中心城市的转移,就魏晋十六国乱世而言,这一城市选择行为是相当成功的。进而论之,代广固城而兴的东、南两阳城及清代的青州满城,之所以均大体不出今天青州市区的范围,与它们均接近青齐地区几何中心的地理位置关系极大。     

Adult brains don't fully overcome biases that lead to incorrect performance during cognitive development: an fMRI study in young adults completing a Piaget‐like task

A current issue in developmental science is that greater continuity in cognition between children and adults may exist than is usually appreciated in Piaget‐like (stages or ‘staircase’) models. This phenomenon has been demonstrated at the behavioural level, but never at the brain level. Here we show with functional magnetic resonance imaging (fMRI), for the first time, that adult brains do not fully overcome the biases of childhood. More specifically, the aim of this fMRI study was to evaluate whether the perceptual bias that leads to incorrect performance during cognitive development in a Piaget‐like task is still a bias in the adult brain and hence requires an executive network to overcome it. Here, we compared two numerical‐judgment tasks, one being a Piaget‐like task with number–length interference (called ‘INT’) and the other being a control task with number–length covariation (‘COV’). We also used a colour‐detection task to control for stimuli numerosity, spatial distribution, and frequency. Our behavioural results confirmed that INT remains a difficult task for young adults. Indeed, response times were significantly higher in INT than in COV. Moreover, we observed that only in INT did response times increase linearly as a function of the number of items. The fMRI results indicate that the brain network common to INT and COV shows a large rightward functional asymmetry, emphasizing the visuospatial nature of these two tasks. When INT was compared with COV, activations were found within a right frontal network, including the pre‐supplementary motor area, the anterior cingulate cortex, and the middle frontal gyrus, which probably reflect detection of the number/length conflict and inhibition of the ‘length‐equals‐number’ response strategy. Finally, activations related to visuospatial and quantitative processing, enhanced or specifically recruited in the Piaget‐like task, were found in bilateral posterior areas.     

Choice or circumstance: When are women penalized for their success?

Past research shows that successful women in traditionally masculine roles often experience interpersonal penalties not sustained by similarly successful men. In two studies we, addressed the question of how the perceived motivation of women for counter-stereotypical positions affects whether such penalties occur. Specifically, we investigated whether women who are successful in male gender-typed roles are less likely to be penalized when their attainment of the role is due to circumstance than to focused and intentional goal pursuit. In Study 1, we compared reactions to women and men who had been successful in a leadership role on a STEM project and showed that when a woman had been arbitrarily assigned to the leadership role she incurred fewer interpersonal penalties than when she had actively pursued it. In Study 2, we replicated and extended these findings by demonstrating similar effects for a successful woman in a financial position when she had attained her position due to a series of lucky breaks rather than purposeful goal-directed efforts. The results of these studies support the idea that the perception that women have actively chosen to pursue counter-normative goals plays an important role in determining whether they are penalized for their success in traditionally male domains. It was not simply being in the role, but how she got there, that determined whether the derogation and dislike shown to be directed at successful women in past research occurred.     

An integrative analysis of intrinsic and extrinsic motivation in sport

Abstract

The purpose of this paper is to propose a motivational sequence that integrates much of the intrinsic and extrinsic motivation literature in sport. The proposed motivational sequence: “Social Factors → Psychological Mediators → Types of Motivation → Consequences” is in line with self-determination theory (Deci & Ryan. 1985. 1991) and the Hierarchical model of intrinsic and extrinsic motivation (Vallerand, 1997). Using the sequence, it is first shown that the motivational impact of social factors inherent in sport, such as competition/cooperation, success/failure, and coaches' behaviors toward athletes, takes place through their influence on athletes' perceptions of autonomy, competence, and relatedness (i.e., the psychological mediators). Second, recent results are provided with respect to a new multidimensional measure (i.e., the Sport Motivation Scale; Pelletier et al., 1995) to assess the different types of athletes' motives. Third, we review findings that suggest that such sport motives lead to various consequences for the athlete e.g.     

Cultural knowledge,category label,and social connections: Components of cultural identity in the global,multicultural context

Cultural identity refers to the psychological connection between an individual's self and a culture. In this paper, we identify three components that make up an individual's cultural identity – cultural knowledge, category label, and social connections. The cultural knowledge component connects an individual with a culture through the individual's direct endorsement of what are widely known to be the culture's central characteristics. The category label component connects an individual with a culture through the individual's depersonalized membership in a cultural collective. The social connections component connects an individual with a culture through networks of specific social relationships. The three components are conceptually distinct, and yet may have interconnections in influencing the development of cultural identity. We examine the implications of the three components on cultural identification processes in the context of multiculturalism and global cultural contact.     

The Effect of Mindfulness-based Programs on Cognitive Function in Adults: A Systematic Review and Meta-analysis

Neuropsychology Review - Mindfulness-based programs (MBPs) are increasingly utilized to improve mental health. Interest in the putative effects of MBPs on cognitive function is also growing. This...