The effects of video feedback on running form

Correct running form is important for injury prevention; as such, correct form promotes continued engagement in running as a long-term form of exercise. Researchers have shown video feedback to be an effective strategy to improve athletic form for a variety of sports, but it has not been evaluated in any behavior analytic research as a method for improving running form. The purpose of this study is to evaluate the effectiveness of video feedback to improve running form for regular runners. During baseline, each participant was video recorded while running without any feedback (verbal or video). During intervention, the researcher recorded the participant, then showed them the video and provided feedback on correct or incorrect form, according to a 9-step task analysis. Results show that all three participants achieved 100% correct steps on the task analysis when video feedback was used to maintain their form during follow-up.     

美国社区卫生服务运行机制和管理模式研究

美国的卫生服务系统由社区卫生服务和医院服务两大部分组成。通过从组织形式、筹资机制、人力资源、动力与约束机制以及管理几个方面,对美国社区卫生服务的运行机制与管理模式进行分析,以期对我国社区卫生的发展有所借鉴与帮助。     

The linkage of work achievement to self-esteem,career maturity,and college achievement

This study tested whether self-esteem and mature career attitudes related to one another and complemented one another in predicting academic and work achievement for 174 college students. Analysis showed both constructs related to achievement and supported the thesis that self-esteem facilitates development of mature career attitudes, which in turn promote academic and work achievement. The findings are discussed in terms of their implications for theory and practice.     

Running is the neurogenic and neurotrophic stimulus in environmental enrichment

Environmental enrichment (EE) increases dentate gyrus (DG) neurogenesis and brain-derived neurotrophic factor (BDNF) levels. However, running is considered an element of EE. To dissociate effects of physical activity and enrichment on hippocampal neurogenesis and BDNF levels, young female C57Bl/6 mice were housed under control, running, enrichment, or enrichment plus running conditions, and injected with bromodeoxyuridine. Cell genesis was assessed after 12 d and differentiation was analyzed 1 mo later. In addition, locomotor activity in the open field and hippocampal mature BDNF peptide levels were measured. Open-field adaptation was improved in all groups, compared to controls, but more so with running. New cell proliferation, survival, neuron number, and neurotrophin levels were enhanced only when running was accessible. We conclude that exercise is the critical factor mediating increased BDNF levels and adult hippocampal neurogenesis.     

Levels of immersion, tacit knowledge and expertise

This paper elaborates on the link between different types and degrees of experience that can be gone through within a form of life or collectivity—the so-called levels of immersion—and the development of distinct types of tacit knowledge and expertise. The framework is then probed empirically and theoretically. In the first case, its ‘predictions’ are compared with the accounts of novices who have gone through different ‘learning opportunities’ during a pre-operational training programme for running a huge nickel industrial plant in Brazil. These are also analysed vis-à-vis the experience of an expert who has designed and experienced the outcomes of two pre-operational training sessions in the nickel industry before developing and managing the one discussed here. Theoretically, the framework is used to pinpoint exactly what interactional experts who have developed their expertise through linguistic socialisation alone are able to do as well as to analyse the case of technical connoisseurs. The results indicate that the proposed framework is useful. It supports the design and improvement of training programmes for the development of tacit knowledge while at the same time bringing about a refined analysis of claims concerning the abilities of types of experts and expertise.     

Personality development from late adolescence to young adulthood: differential stability, normative maturity, and evidence for the maturity-stability hypothesis

This investigation examined personality development during the transition from adolescence to adulthood using the brief form of the Multidimensional Personality Questionnaire (Patrick, Curtin, & Tellegen, 2002). Parent and self-reports of personality were obtained in 1994 (average age=17.60 years), and self-reports were obtained in 2003 (average age=27.24 years). There was evidence of both differential stability and normative changes in the direction of increased functional maturity during this transition. Moreover, adolescents with more mature personalities in 1994 tended to show fewer personality changes from 1994 to 2003. These maturity-stability effects held when parent reports were used to assess personality. All told, there was evidence of both stability and change in personality during the transition to adulthood.     

Sadomasochism, sexual excitement, and perversion

Sadomasochism, an ingredient of infantile sexuality, is an essential part of normal sexual functioning and love relations, and of the very nature of sexual excitement. Sadomasochistic elements are also present in all sexual perversions. Sadomasochism starts out as the potential for erotic masochism in both sexes, and represents a very early capacity to link aggression with the libidinal elements of sexual excitement. Sexual excitement may be considered a basic affect that overcomes primitive splitting of love and hatred. Erotic desire is a more mature form of sexual excitement. Psychoanalytic exploration makes it possible to uncover the unconscious components of sexual excitement: wishes for symbiotic fusion and for aggressive penetration and intermingling; bisexual identifications; the desire to transgress oedipal prohibitions and the secretiveness of the primal scene, and to violate the boundaries of a teasing and withholding object. The relation between these wishes and the development of erotic idealization processes in both sexes is explored in the context of a critical review of the pertinent psychoanalytic literature.     

Tom, Huck, and Oliver Stone as advocates in Kohlberg's just community: theory-based strategies for moral education

Kohlberg's studies of moral reasoning provide a good theoretical framework for describing the developmental process that may serve as the basis for programs of moral education for adolescents. Kohlberg viewed moral education, particularly during adolescence, as the stimulation of the natural developmental process which leads to mature moral reasoning. Building on Kohlberg's work, specifically his concept of the just community approach where the teacher and more advanced peers serve as advocates of mature moral reasoning, this article presents the educator with a theoretical rationale for implementing procedures that can foster moral development. A case is made for using contemporary films and literature as mechanisms for stimulating moral development among adolescents.     

Age-dependent consequences of seizures: relationship to seizure frequency, brain damage, and circuitry reorganization

Seizures in the developing brain pose a challenge to the clinician. In addition to the acute effects of the seizure, there are questions regarding the impact of severe or recurrent seizures on the developing brain. Whether provoked seizures cause brain damage, synaptic reorganization, or epilepsy is of paramount importance to patients and physicians. Such questions are especially relevant in the decision to treat or not treat febrile seizures, a common occurrence in childhood. These clinical questions have been addressed using clinical and animal research. The largest prospective studies do not find a causal connection between febrile seizures and later temporal lobe epilepsy. The immature brain seems relatively resistant to the seizure-induced neuronal loss and new synapse formation seen in the mature brain. Laboratory investigations using a developmental rat model corresponding to human febrile seizures find that even though structural changes do not result from hyperthermic seizures, synaptic function may be chronically altered. The increased understanding of the cellular and synaptic mechanisms of seizure-induced damage may benefit patients and clinicians in the form of improved therapies to attenuate damage and changes induced by seizures and to prevent the development of epilepsy.     

Anorexia,masochism, self-mutilation,and autoerotism: the spider mother

In summary, both self-mutilators and eating-disordered individuals come from dysfunctional homes with a very controlling mother and usually absent father. They often have a history of trauma. They are depressed and obsessive, attached to their mothers, who discourage attempts at emancipation. The symptoms serve the purpose of keeping them as little girls with negative feelings toward menstruation, sexual maturity, development, and femininity in general. These symptoms comprise self-destructive behavior in the service of removing sexual thoughts, temptation, and activities. Favazza (1987) included both eating disorders and self mutilation in his "deliberate self-harm syndrome." The symptoms, whether they be anorexic, bulimic, or a form of self-mutilation are seen as "autoerotic in nature and a substitute for normal masturbation" (Hull & Lane, 1988). Eating disorders and delicate self-mutilation are said to have "a cathartic, self-purifying, function in that they modulate states of anxiety, sexual tension, anger or dissociated emptiness, and they bring about a tremendous quasi-physical sense of relief" (Cross, 1993, p. 50). These patients' use of substitutes prevents maturation and growth as women, causing regression to pregenital phases with the use of pregenital defenses, and the demise of the demands of puberty and mature sexuality.     

Age-dependent variability in spatiotemporal gait parameters and the walk-to-run transition

Adolescents tend to exhibit more variability in their gait patterns than adults, suggesting a lack of gait maturity during this period of ongoing musculoskeletal growth and development. However, there is a lack of consensus over the age at which mature gait patterns are achieved and the factors contributing to gait maturation. Therefore, the purpose of this study was to investigate gait control and maturity in adolescents by determining if differences existed between adolescents and adults in a) the amount of spatiotemporal variability of walking and running patterns across a range of speeds, and b) how swiftly gait patterns are adapted to increasing gait speed during the walk-to-run transition. Forty-six adolescents (10–12-year-olds, n = 17; 13–14-year-olds, n = 12; and 15–17-year-olds, n = 17) and 12 young adults completed an incrementally ramped treadmill test (+0.2 km·h⁻¹ every 30 s) to determine the preferred transition speed (PTS) during a walk-to-run transition. Age-related differences in the variability of stride lengths and stride durations were assessed across 4 speeds (self-selected walking speed, PTS − 0.06 m·s⁻¹, PTS + 0.06 m·s⁻¹, PTS + 0.83 m·s⁻¹). Repeated measures ANOVAs (p < 0.05) compared coefficients of variation for these spatiotemporal parameters, while a one-way ANOVA compared the numbers of gait transitions and speed increments used to identify PTS between the adolescent groups and young adults. Compared to adults, 10–12yo exhibited more spatiotemporal variability during all gait conditions, while 13–17yo only exhibited more variability at PTS + 0.06 m·s⁻¹. No age-dependent pattern was observed in PTS values, but 10–12yo completed more gait transitions over more speed increments than 15–17yo and adults. The development of mature gait patterns is thus a progressive process, with walking maturing at an earlier age than running. As 10-12yo were unable to swiftly adapt gait patterns to the changing task demands, their control mechanisms of gait may not have fully matured yet.     

Relation of level of exercise, age, and weight-cycling history to weight and eating concerns in male and female runners.

We examined the association between level of exercise and degree of weight preoccupation in a large sample of male and female runners, as well as risk factors posited to influence weight and eating concerns in the general population. Subjects were 2,459 males and 1,786 females who had completed a questionnaire on weight and eating concerns in a national running magazine. Eight percent of the males and 24% of the females had symptomatic scores on the Eating Attitudes Test (EAT). Exercise level, defined as weekly running mileage, was positively associated with excessive weight and eating concerns in males but not in females. Both sexes with a history of weight cycling were more likely to have symptomatic EAT scores than those with no such history. These results highlight the importance of studying these concerns in males as well as females and of examining the role of exercise level and weight-cycling history in the development of serious weight preoccupations.     

Language Promotes False-Belief Understanding: Evidence From Learners of a New Sign Language

ABSTRACT— Developmental studies have identified a strong correlation in the timing of language development and false-belief understanding. However, the nature of this relationship remains unresolved. Does language promote false-belief understanding, or does it merely facilitate development that could occur independently, albeit on a delayed timescale? We examined language development and false-belief understanding in deaf learners of an emerging sign language in Nicaragua. The use of mental-state vocabulary and performance on a low-verbal false-belief task were assessed, over 2 years, in adult and adolescent users of Nicaraguan Sign Language. Results show that those adults who acquired a nascent form of the language during childhood produce few mental-state signs and fail to exhibit false-belief understanding. Furthermore, those whose language developed over the period of the study correspondingly developed in false-belief understanding. Thus, language learning, over and above social experience, drives the development of a mature theory of mind.     

Walking and Running on the Circular Treadmill: Transition Speed and Podokinetic Aftereffects

The author compared 10 participants' self-selected walk-to-run transition speeds on a standard treadmill with those on a circular treadmill. The speed of the outer limb at walk-to-run transition on the circular treadmill and on the standard treadmill were very similar. Adaptive aftereffects from running and walking on the circular treadmill were also similar. When asked to step in place without vision, all participants inadvertently turned in circles following walking or running on the treadmill. The results of the present study suggest that the mechanisms controlling walk-to-run transitions are similar for the standard and circular treadmills and demonstrate the robust generalizability of locomotor aftereffects from running to walking. Adaptive control of speed, form, and direction may therefore share similar mechanisms for walking and running.     

Walking and running on the circular treadmill: transition speed and podokinetic aftereffects

The author compared 10 participants' self-selected walk-to-run transition speeds on a standard treadmill with those on a circular treadmill. The speed of the outer limb at walk-to-run transition on the circular treadmill and on the standard treadmill were very similar. Adaptive aftereffects from running and walking on the circular treadmill were also similar. When asked to step in place without vision, all participants inadvertently turned in circles following walking or running on the treadmill. The results of the present study suggest that the mechanisms controlling walk-to-run transitions are similar for the standard and circular treadmills and demonstrate the robust generalizability of locomotor aftereffects from running to walking. Adaptive control of speed, form, and direction may therefore share similar mechanisms for walking and running.     

Valence,form, and content of self-talk predict sport type and level of performance

In this paper, we aimed to test whether we could predict sport type (badminton or running) and marathon proficiency from the valence, form, and content of the athletes’ self-reported inner speech. Additionally, we wanted to assess the difference between self-talk during high intensity and low intensity exercise. The present study corroborated existing research – we were able to predict both sport type in Study 1 and intensity level as well as marathon proficiency in Study 2 from questionnaire data using machine learning models. In Study 1, we found that badminton players engage more in worry and anxiety-control while runners are more prone to task disengagement. Interestingly, it seemed in Study 2 that the more participants engaged in condensed, positive, and repetitive self-talk when not pushing themselves, the slower their fastest marathons and half marathons were. We discuss potential explanations for these findings and make suggestions for future research.     

Creative potential, creative achievement, and personal growth

We tested the idea that young people who have creative potential (are complex and unconventional) increase in intrapsychic awareness as they mature but often have difficulty with psychosocial growth, especially the development of a cohesive identity; and that for some women commitment to creative work solves the problem of psychosocial integration and leads to creative achievement. In a longitudinal sample of 109 women, these ideas were supported: Creative potential and creative achievement were both associated with intrapsychic growth but only creative achievement was associated with psychosocial growth. Regression analyses showed that the development of a cohesive identity from early to middle adulthood added to and interacted with creative potential in the prediction of creative achievement.     

The development of spatial location coding: Place learning and dead reckoning in the second and third years

There are two possible ways to code spatial location: viewer-referenced and externally referenced systems. The mature form of each system makes use of metric information (in forms of coding termed dead reckoning and place learning, respectively). Each system also exists in a simpler form not using metric information (termed response learning and cue learning, respectively). We report an experiment designed to examine the development of the two mature forms of spatial coding. Children aged 16 to 36 months were asked to search for objects hidden in a long rectangular sandbox, after they moved to the opposite side of the box, either with visual landmarks available or in a curtained environment. When moving in a curtained environment, and hence needing to rely primarily on dead reckoning, children across this age range performed at levels above chance but reliably less accurate than when they did not move. The size of the decrement due to movement did not decrease with age. Thus, the dead reckoning system may become available before 16 months but undergo no further improvement through 3 years. On the other hand, comparisons between children who moved in the curtained environment and children who moved with visual landmarks available showed that only children older than 21 months did better when external landmarks could be seen. This finding suggests a relatively late emergence of place learning.     

人际医患信任的概念内涵、正向演变与影响因素

人际医患信任是人际水平上的医患信任, 是医患双方在互动过程中, 相信对方不会做出不利于自己甚至有害于自己行为的一种预期判断和心理状态。理想化的人际医患信任的正向演变可能呈现出由计算型信任到了解型信任, 再到认同型信任这一逐渐深化的过程。社会环境、就医情境与个体特征因素交互作用于医患信任建立与演变的心理机制与过程。未来研究应收集纵向数据探索医患信任的内容维度、影响机制及其演变特征, 并验证医患信任对于医患双方态度与行为的具体作用机制。     

A Specific Developmental Deficit in Obsessive-Compulsive Disorder: The Example of the Wolf Man

In this paper I suggest that the origins of the “contamination/cleaning” form of obsessive compulsive disorder (OCD) include a developmental history characterized by marked overprotectiveness allied with parental failure to respond to core aspects of the child's personal reality. The combined effect of these parental behaviors is likely to impede the establishment of a mature conception of the boundary between inner and outer worlds. The consequence of such a deficiency is the persistence of the magical form of thinking which is essential to the production of OCD. In addition, the individual is left with a disruption of personality development, the main features of which include timidity and falseness. The Wolf Man provides an example of both the characteristic development history in OCD and its consequences. Treatment based on this theoretical background may provide benefit not predicted by current psychoanalytic pessimism.