乒乓球运动员人格特征对比赛成绩及专业发展的影响

根据先前研究确定的乒乓球运动员人格特征,对少体队、省队、国家队三个层次的乒乓球运动员群体进行纵向追踪研究。研究结果发现,乒乓球运动员人格特征与其比赛成绩存在较高相关,能够较好的预测高水平运动的比赛成绩;升级组运动员在乐观性、宽容性、探究性、有恒性、自律性、果断性、稳定性等7项特质上优于未升级组运动员,乒乓球运动员人格特征可较准确地预测球员在专业水平上的成功表现。研究的结果支持了先前横向比较研究的结论:乒乓球运动员的人格特征主要由表现性、乐观性、变通性、宽容性、合作性、稳定性、探究性、紧张性、有恒性、自律性、独立性、果断性和工作专注13项心理特质组成。     

Dimensions of achievement goal orientation and coping in South African wheelchair rugby players with quadriplegia

This study investigated the relationship between dispositional achievement goal orientation (task and ego) and coping ability in wheelchair rugby players with quadriplegia. The sample consisted of 16 (15 males and 1 female) players between the ages of 25 and 44 (M=33.7 years; SD=8.7) who were selected for South Africa's national training squad in preparation for the 2011 International Wheelchair Rugby Federation (IWRF) Asia-Oceania Championship. Players self-reported on their perception of success and athletic coping skills. The data were analysed for correlational associations between dimensions of achievement goal orientation and psychological skills associated with coping in sport. Findings revealed that players have both high task and fairly high ego orientation of which task orientation was significantly correlated with coping ability.     

局中人和局外人的决策差异研究

由中国成语“当局者迷,旁观者清”出发,结合西方行为经济学最近的进展,提出局中人和局外人在不确定性决策上存在系统差异的假设。为此,本研究使用触棒迷津进行实验,被试是在校大学生82名,让他们在学习五次后就后续实验方案作出二择一的选择。结果发现,局中人比局外人更加冒险,即倾向于选择高风险、高报偿的方案;在决策信息使用上,局中人更偏重客观信息;局中人的反应变异性小于局外人,局外人体验到更大的选择冲突。最后,对这一现象的深层原因提出了几种解释。     

Differences in the neurocognitive profiles of professional and semi-professional male South African rugby union players

This study investigated possible cognitive functioning profile differences between professional and semi-professional rugby players. Seventy-nine male rugby union players (professional = 55, semi-professional = 24; age range = 19–37 years) participated in the study. The players completed a battery of neuropsychological functioning tests covering the following domains: memory tasks, attention and behavioural tasks, sensory-motor tasks, executive functioning tasks, verbal tasks, and emotion identification tasks. Results following Fisher’s exact test comparisons revealed no significant group differences in the cognitive functioning profiles.     

动作视频游戏专业玩家的认知神经特征

动作视频游戏是电子竞技中受众最广、心智挑战最高的游戏项目之一。目前对动作视频游戏专业玩家的能力特征了解尚不清晰。以职业选手和排名较高的玩家为对象,横断研究发现动作视频游戏专业玩家具有更快的注意选择、更稳定的持续注意、更好的注意瞬脱表现、更高的多目标追踪能力和工作记忆容量。专业玩家更好的注意表现主要与更高的P3波幅有关,工作记忆表现与背外侧前额叶和右后顶叶等可塑性变化有关。此外,专业玩家还存在中央执行网络与多个脑网络间的功能连接增强。目前游戏训练对认知的促进程度尚不足以弥补专业玩家和新手的认知差距。基础的认知能力对玩家游戏表现的预测有限。未来可扩展更高级的游戏决策,游戏组块或游戏模式的认知研究。     

A cognitively enhanced collaborative control architecture for an intelligent wheelchair: Formalization,implementation and evaluation

For people with mobility impairment, powered wheelchairs are able to extend independent transportation. However, most users find it difficult to operate the powered wheelchairs effectively. This can be due to variety of physical or cognitive impairments. Herein lies the motivation of developing intelligent wheelchairs that provide the user, assistance in control and navigation as and when required, supporting retention of residual skills. For better Human-Robot Interaction, such intelligent wheelchairs need to be cognitively enhanced. This paper propose a Cognitive Collaborative Architecture (CCA) for an intelligent wheelchair which is designed to assist the user as a team member. Whenever user finds it difficult to drive or control the wheelchair, CCA transfers control to the robotic agent which continues the human navigation strategy providing ‘assistance-as-required’.     

From reasonable preferences,via argumentation,to logic

This article demonstrates that typical restrictions which are imposed in dialogical logic in order to recover first-order logical consequence from a fragment of natural language argumentation are also forthcoming from preference profiles of boundedly rational players, provided that these players instantiate a specific player type and compute partial strategies. We present two structural rules, which are formulated similarly to closure rules for tableaux proofs that restrict players' strategies to a mapping between games in extensive forms (i.e., game trees) and proof trees. Both rules are motivated from players' preferences and limitations; they can therefore be viewed as being player-self-imposable. First-order logical consequence is thus shown to result from playing a specific type of argumentation game. The alignment of such games with the normative model of the Pragma-dialectical theory of argumentation is positively evaluated. But explicit rules to guarantee that the argumentation game instantiates first-order logical consequence have now become gratuitous, since their normative content arises directly from players' preferences and limitations. A similar naturalization for non-classical logics is discussed.     

Cumulative mild head injury (CMHI) among college rugby players: A replication and extension study

We investigated the prevalence of cumulative mild head injury (CMHI) symptoms among college student rugby players pre- and post-season. The players completed a number of neuropsychological tests known to be sensitive to CMHI effects: vocabulary, working memory, motor coordination, and a self-report Post Concussive Symptomology (PCS) checklist. A total of 18 rugby players registered at a South African university were participants (age range 18 to 24 years, SD?=?2.02 years). Data were analysed utilising Fishers Exact Test comparisons of pre- and post-season mean scores. There was significant variability on mean scores between the rugby forwards and backline players in terms of verbal memory and concept formation, cognitive flexibility, working memory, and visual motor-processing speed. Poorer overall scores from the rugby forwards may also be indicative of depression as they reported more insomnia and anger on the PCS than the backline players.     

Real-time MRI comparisons of brass players: A methodological pilot study

This paper describes the use of real-time MRI at 30 frames/s in studying motor function within the oropharyngeal cavity of a trumpet, horn, trombone, and tuba player. Using Image J and customized MB-Ruler Pro software, analyses of discrete 33.3 ms snapshots of motion extracted from real-time MRI films obtained during an ascending five note sequence performed on a plastic practice device (B.E.R.P.) revealed inter-instrument differences in oropharyngeal cavity size and tongue conformation when moving from lower to higher notes. Tuba and trombone show a progressive decrease in oropharyngeal area featuring an upward and forward displacement of the tongue. Trumpet showed progressive increases in oropharyngeal area, with the posterior compartment showing the largest change, while horn essentially showed no change. A novel dynamic quantitative analysis method is also described utilizing Matlab. This method employs user-specified line profiles, aligned to the direction of the movement of interest. It takes advantage of time-varying pixel luminescence to derive spatial and temporal gradients. These gradients make possible the acquisition of kinematic data to describe movement in terms of slower position changes (spatial gradient) as well as fast, articulatory movements (temporal gradient). Spatial gradient analysis for the trumpet player demonstrates a progressive raising of the tongue during the ascending five note exercise. Temporal gradient analysis of double-tonguing revealed similarities in range of motion, anti-phase behavior, and frequency across instruments with respect to movements of the tongue tip and back of tongue. The paper concludes by making recommendations for extending these methods to studying musician’s dystonia.