Information–movement coupling in developing cricketers under changing ecological practice constraints

Changing informational constraints of practice, such as when using ball projection machines, has been shown to significantly affect movement coordination of skilled cricketers. To date, there has been no similar research on movement responses of developing batters, an important issue since ball projection machines are used heavily in cricket development programmes. Timing and coordination of young cricketers (n = 12, age = 15.6 ± 0.7 years) were analyzed during the forward defensive and forward drive strokes when facing a bowling machine and bowler (both with a delivery velocity of 28.14 ± 0.56 m s⁻¹). Significant group performance differences were observed between the practice task constraints, with earlier initiation of the backswing, front foot movement, downswing, and front foot placement when facing the bowler compared to the bowling machine. Peak height of the backswing was higher when facing the bowler, along with a significantly larger step length. Altering the informational constraints of practice caused major changes to the information–movement couplings of developing cricketers. Data from this study were interpreted to emanate from differences in available specifying variables under the distinct practice task constraints. Considered with previous findings, results confirmed the need to ensure representative batting task constraints in practice, cautioning against an over-reliance on ball projection machines in cricket development programmes.     

From horror to ethical responsibility: Carl Gustav Jung and Stephen King encounter the dark half within us,between us and in the world

This paper explores the experience of horror. The term is usually understood collectively to refer to experiences of terrorism, racism and other conflicts; however, the paper explores the equal horror for the individual of facing deep and painful psychic contents and traumatic experiences. The paper explores the way that both C.G. Jung, through analysis of the psyche, and the author Stephen King, through his horror novels, have accepted and explored the experience of encountering ‘the dark half’ or ‘It’ that is the other within themselves, forming images and symbols capable of linking their personal experience to that of the collective. This encounter is transformed, as far as Jung is concerned by analytical psychology and for King by fiction, through an attitude of active imagination. This led both men to developing an ethical responsibility towards the images of the unconscious, as well as the personal and collective contents of human life. The paper depicts how encountering the ‘dark half’, through Jung and King can provide a Jungian analyst with a special attitude with which to deeply explore and ethically process the experience of horror in different fields, including therapeutic practice, analytical training and in the traumatic and conflictual facing of the other, with which, today as always, the world presents us.     

INSTABILITY AND DISSONANCE: PROVOCATIONS FROM SANDRA HARDING

Abstract. Sandra Harding's work is useful, not only as a critique of the scientific method and its epistemological constructs, but also in providing new energy and insights to the discussions about epistemology between theology and science. Feminist theory has been critical of the worldviews inherited from the Enlightenment. No longer is there one unambiguous way of knowing ourselves and the world around us, a single vision of reality. Feminist philosophers of science like Sandra Harding and Donna Haraway have redefined the scientific method and its analytic categories. They have contributed significantly to this discussion by moving the Enlightenment epistemological issues into the arena of politics and ethics. Feminist theory continues to remind us that what is important is not only how or what we know but what we do with that knowledge and how we use it.     

Early perception-action coupling: eye movements and the development of object perception

We investigated the scanning strategies used by 2- to 3.5-month-old infants when viewing partly occluded object displays. Eye movements were recorded with a corneal reflection system as the infants observed stimuli depicting two rod parts above and below an occluding box. Stimulus parameters were chosen on the basis of past research demonstrating the importance of motion, occluder width, and edge alignment to perception of object unity. Results indicated that the infants tailored scanning to display characteristics, engaging in more extensive scanning when unity perception was challenged by a wide occluder or misaligned edges. In addition, older infants tended to scan the lower parts of the displays more frequently than did younger infants. Exploration of individual differences, however, revealed marked contrasts in specific scanning styles across infants. The findings are consistent with views of perceptual development stressing the importance of information processing skills and self-directed action to the acquisition of object knowledge.     

Exploring the Within-Person Coupling of Reading Vision and Cognition in the Elderly

ABSTRACT

This study examined the within-person relationship between reading vision and cognitive functioning. Analysis was conducted on 36 community-dwelling elderly (age range?=?60–87) who completed a reading vision task and three cognitive tests (i.e., Rey Auditory Verbal Learning Task (AVLT), Letter Series, and Number Comparison) twice a day over 60 consecutive days. Significant within-person variability was found for the reading vision measure. Additionally, a main effect was found for reading vision and performance on the AVLT and Number Comparison task; such that on occasions when reading vision was poor, cognitive performance suffered.     

Pattern Stability and Error Correction During In-Phase and Antiphase Four-Ball Juggling

The authors studied pattern stability and error correction during in-phase and antiphase 4-ball fountain juggling. To obtain ball trajectories, they made and digitized high-speed film recordings of 4 highly skilled participants juggling at 3 different heights (and thus different frequencies). From those ball trajectories, the authors determined and analyzed critical events (i.e., toss, zenith, catch, and toss onset) in terms of variability of point estimates of relative phase and temporal correlations. Contrary to common findings on basic instances of rhythmic interlimb coordination, in-phase and antiphase patterns were equally variable (i.e., stable). Consistent with previous findings, however, pattern stability decreased with increasing frequency. In contrast to previous results for 3-ball cascade juggling, negative lag-one correlations for catch-catch intervals were absent, but the authors obtained evidence for error corrections between catches and toss onsets. That finding may have reflected participants' high skill level, which yielded smaller errors that allowed for corrections later in the hand cycle.     

A dynamical system perspective to understanding badminton singles game play

By altering the task constraints of cooperative and competitive game contexts in badminton, insights can be obtained from a dynamical systems perspective to investigate the underlying processes that results in either a gradual shift or transition of playing patterns. Positional data of three pairs of skilled female badminton players (average age 20.5 ± 1.38 years) were captured and analyzed. Local correlation coefficient, which provides information on the relationship of players’ displacement data, between each pair of players was computed for angle and distance from base position. Speed scalar product was in turn established from speed vectors of the players. The results revealed two patterns of playing behaviors (i.e., in-phase and anti-phase patterns) for movement displacement. Anti-phase relation was the dominant coupling pattern for speed scalar relationships among the pairs of players. Speed scalar product, as a collective variable, was different between cooperative and competitive plays with a greater variability in amplitude seen in competitive plays leading to a winning point. The findings from this study provide evidence for increasing stroke variability to perturb existing stable patterns of play and highlights the potential for speed scalar product to be a collective variable to distinguish different patterns of play (e.g., cooperative and competitive).     

癌痛规范化治疗的制约因素分析

癌痛严重影响中晚期癌症患者生活质量,通过使用第三阶梯强阿片类止痛药物,绝大部分患者疼痛能得到很好的控制。微观上,癌痛治疗的疗效与患者及医务人员的认识程度密切相关,也与医院麻醉科等其他科室的参与程度有关。宏观上,社会人文、经济、政策管理等方面的不足都制约着癌痛规范化治疗的有效实施。癌痛的规范化治疗是一项管理措施,需要进行疼痛评估、家庭支持及宗教组织的参与帮助等。我们国家在文化、经济、教育等各个方面取得长足进步时,癌痛治疗会更加规范、合理、人性化。     

中医药发展的挤出效应及制度耦合

制度与制度之间常常存在挤出效应,在医疗卫生服务制度体系内,价格管制、支付制度和医疗卫生服务评价制度等,造成了对中医药政策和中医药应用的挤出.而中医药在我国医改战略转型、医学模式转变和促进制度创新方面具有十分积极的意义.制度耦合是解决制度冲突、制度挤出的基本思想,把中西医统一到卫生事业发展的目标上来,把发挥中医药优势和特色作为中医药政策的核心,构建中西医并重的机制、优化医疗卫生服务制度结构和完善中医药评价体系,是缓解挤出效应,促进中医药发展的制度选择.