Performance characteristics of a winning polo team

Polo is played globally, and is contested by two teams of four players on horseback. Despite popularity, there is little academic literature assessing Polo players, and what constitutes successful Polo performance. One reason for this may be Polo’s unique player rating system, the handicap, which quantifies individuals and teams’ level of play. We sought to characterise the play of a tournament winning high-goal polo team (KPF) using percent and raw differences between teams using a customised matrix, which was designed with input from international polo players. Secondly, we assessed the association between player handicap and success rates of key performance metrics. KPF won five of seven games played, with forehand middle (FHM) being the least variable shot (-4 to 5% success rate), whereas long backhand shots were the most variable (-50 to 45% success rate). Fewer turnovers were conceded than the opposition in all games won, and in four out of the five winning games, more penalties were awarded to KPF than their opponents. At an individual level, FHM was significantly correlated to player handicap (0.562, Large: p<0.05). Player handicap was also moderately correlated with backhand middle (0.33), backhand long (0.361), and ride off (0.362) success rates. Turnovers and penalties awarded confer clear attacking and goal-scoring opportunities. FHM, backhand shots and ability to contest for the ball (ride off) are key performance metrics, positively associated with player handicap, and higher handicap players demonstrate greater success rates and or less variability than those with lower handicaps. However, variability within players of the same handicap is evident, suggesting subjectivity of the handicapping system

Individual cognitive-behavioural anger treatment for people with mild-borderline intellectual disabilities and histories of aggression: a controlled trial

Objectives - Anger is a significant predictor and activator of violent behaviour in patients living in institutional settings. There is some evidence for the value of cognitive-behavioural treatments for anger problems with people with intellectual disabilities. In this study, a newly designed treatment targeted at anger disposition, reactivity, and control was provided to intellectually disabled offenders with aggression histories living in secure settings. Design - About forty detained patients with mild-borderline intellectual disabilities and histories of serious aggression were allocated to specially modified cognitive-behavioural anger treatment (AT group) or to routine care waiting-list control (RC group) conditions. Methods - AT group participants received 18 sessions of individual treatment. The AT and RC groups were assessed simultaneously at 4 time points: screen, pre- and post-treatment, and at 4-month follow-up using a range of self- and staff-rated anger measures. The effectiveness of the treatment was evaluated using ANCOVA linear trend analyses of group differences on the main outcome measures. Results - The AT group's self-reported anger scores on a number of measures were significantly lower following treatment, compared with the RC wait-list condition, and these improvements were maintained at follow-up. Limited evidence for the effectiveness of treatment was provided by staffs' ratings of patient behaviour post-treatment. Conclusions - Detained men with mild-moderate intellectual disabilities and histories of severe aggression can successfully engage in, and benefit from, an intensive individual cognitive-behavioural anger treatment that also appears to have beneficial systemic effects

Exploring the reliability of the modified Rankin Scale

&lt;p&gt;&lt;b&gt;Background and Purpose:&lt;/b&gt; The modified Rankin Scale (mRS) is the most prevalent outcome measure in stroke trials. Use of the mRS may be hampered by variability in grading. Previous estimates of the properties of the mRS have used diverse methodologies and may not apply to contemporary trial populations. We used a mock clinical trial design to explore inter- and intraobserver variability of the mRS.&lt;/p&gt; &lt;p&gt;&lt;b&gt;Methods:&lt;/b&gt; Consenting patients with stroke attending for outpatient review had the mRS performed by 2 independent assessors with pairs of assessors selected from a team of 3 research nurses and 4 stroke physicians. Before formal assessment, interviewers estimated disability based only on initial patient observation. Each patient was then randomized to undergo the mRS using standard assessment or a prespecified structured interview. The second interviewer in the pair reassessed the patient using the same method blinded to the colleague’s score. For each patient assessed, one rater was randomly assigned to video record their interview. After 3 months, this interviewer reviewed and regraded their original video assessment.&lt;/p&gt; &lt;p&gt;&lt;b&gt;Results:&lt;/b&gt; Across 100 paired assessments, interobserver agreement was moderate (k=0.57). Intraobserver variability was good (k=0.72) but less than would be expected from previous literature. Forty-nine assessments were performed using the structured interview approach with no significant difference between structured and standard mRS. Researchers were unable to reliably predict mRS from initial limited patient assessment (k=0.16).&lt;/p&gt; &lt;p&gt;&lt;b&gt;Conclusions:&lt;/b&gt; Despite availability of training and structured interview, there remains substantial interobserver variability in mRS grades awarded even by experienced researchers. Additional methods to improve mRS reliability are required.&lt;/p&gt

Systems for technical refinement in experienced performers: The case from expert-level golf

This paper provides an overview of current golf coaching practices employed with experts, when attempting to make changes to (i.e., refine) a player’s existing technique. In the first of two studies, European Tour golfers (n = 5) and coaches (n = 5) were interviewed to establish the prevalence of any systematic processes, and whether facilitation of resistance to competitive pressure (hereafter termed “pressure resistance”) was included. Study 2 employed an online survey, administered to 89 PGA Professionals and amateur golfers (mostly amateurs; n = 83). Overall, results suggested no standardized, systematic, or theoretically considered approach to implementing technical change, with pressure resistance being considered outside of the change process itself; if addressed at all. In conclusion, there is great scope for PGA professionals to increase their coaching efficacy relating to skill refinement; however, this appears most likely to be achieved through a collaborative approach between coach education providers, researchers, and coaches

‘I understood the words but I didn’t know what they meant’: Japanese online MBA students’ experiences of British assessment practices

We report on a case study of high Japanese student failure rates in an online MBA programme. Drawing on interviews, and reviews of exam and assignment scripts we frame the problems faced by these students in terms of a ‘language as social practice’ approach and highlight the students’ failure to understand the specific language games that underpin the course assessment approach. We note the way in which the distance learning and online context can make the challenges faced by international students less immediately visible to both students and institution

An extension of ‘green port portfolio analysis’ to inland ports: an analysis of a range of eight inland ports in Western Europe.

Haezendonck (2001) introduced an ecological dimension in conventional port portfolio analysis for seaports and applied it to the seaports in the Hamburg – Le Havre range. Given the fast growth of inland waterway transport, and the development of inland ports in the hinterland of seaports, the analysis can also be extended to evaluate the ‘green’ competitiveness of inland ports, as they are considered as important enablers to reach objectives of sustainable development. In this paper, the ‘green port portfolio analysis’ is applied to a range of eight inland ports in Western Europe. This results in (1) a number of specific methodological issues related to the inland port environment, (2) an interesting research agenda both for policy-makers at the local and regional level as well as for inland port managers. Keywords: Strategic management, port management & development

Unfair Contests

Real-world contests are often "unfair" in the sense that outperforming all rivals may not be enough to be the winner, because some contestants are favored by the allocation rule, while others are handicapped. Examples of such contests can be inter alia found in the area of litigation and procurement.This paper analyzes discriminatory contests (which are strategically equivalent to all-pay auctions) with a handicap for one of the participants. We first characterize the equilibriumstrategies, provide closed form solutions, and illustrate the additional strategic issues arising through this asymmetry. We then analyze the issue of the optimal degree of unfairness. From a social point of view, the following trade-off arises: The disadvantage of unfair contests is that the prize may be awarded to an inferior contestant. On the other hand, under the assumption that the effort exerted by contestants to increase their chancesof winning the prize is wasteful from a social point of view, one advantage of an unfair contest is that it leads to lower effort incentives. We characterize situations in which it is optimal for an authority to either stipulate a fair contest, an interior degree of unfairness or even an infinitely unfair contest where the prize is directly awarded to one of the ontestants.microeconomics ;