Longitudinal changes in Super League match locomotor and event characteristics: A league-wide investigation over three seasons in rugby league

The 2019 and 2020 Super League (SL) seasons included several competition rule changes. This study aimed to quantify the difference between the 2018, 2019 and 2020 SL seasons for duration, locomotor and event characteristics of matches. Microtechnology and match event data were analysed from 11 SL teams, comprising 124 players, from 416 competitive matches across a three-year data collection period. Due to an enforced suspension of league competition as a consequence of COVID-19 restrictions, and subsequent rule changes upon return to play, season 2020 was divided into season 2020a (i.e. Pre-COVID suspension) and season 2020b (i.e. Post-COVID suspension). Duration, locomotor variables, and match events were analysed per whole-match and ball-in-play (BIP) periods with differences between seasons determined using mixed-effects models. There were significant (ρ ≤ 0.05) reductions in whole-match and BIP durations for adjustables and backs in 2019 when compared to 2018; albeit the magnitude of reduction was less during BIP analyses. Despite reduced duration, adjustables reported an increased average speed suggesting reduced recovery time between bouts. Both forwards and adjustables also experienced an increase in missed tackles between 2018 and 2019 seasons. When comparing 2019 to 2020a, adjustables and backs increased their average speed and distance whilst all positional groups increased average acceleration both for whole-match and BIP analyses. When comparing 2020a to 2020b, all positional groups experienced reduced average speed and average acceleration for both whole-match and BIP analyses. Forwards experienced an increased number of tackles and carries, adjustables experienced an increased number of carries, and backs experienced an increased number of missed tackles when comparing these variables between season 2020a and 2020b. Rule changes have a greater effect on whole-match duration and locomotor characteristics than those reported during BIP periods which suggests the implemented rule changes have removed stagnant time from matches. Amendments to tackle related rules within matches (e.g., introduction of the ‘six-again’ rule) increases the number of collision related events such as carries and tackles.

Weight cycling in combat sports: revisiting 25 years of scientific evidence

Background As combat sports are classified by body mass, many athletes engage in rapid weight loss (RWL) prior to competition so they can gain an advantage over lighter opponents. Following the weigh-in, athletes engage in rapid weight gain (RWG), whereby some athletes have been able to compete up to three weight categories greater than the official division weighed in at. Results Although the impact of weight cycling on performance remains equivocal, robust scientific evidence indicates serious acute and chronic negative consequences on physiological and health-related parameters. Still, weight cycling remains highly prevalent in combat sports, and interventions to limit or stop this cultural norm are recommended. Conclusions Weigh-ins for combat sports should be transitioned to take place closer to the start of competition. This reduced time and access to engage in RWG will cut down, if not completely prevent, weight cycling. These rule changes that aim to benefit athlete’s health and promote fairness must be made at the international level, which will promote them at those levels below, as well, given qualification protocols.

Code, Culture, and Concrete: Self-Driving Vehicles and the Rules of the Road

Behaviour on the road is ordered by a range of norms, rules, laws, and infrastructures. The introduction of self-driving vehicles onto the road opens a debate about the rules that should govern their actions and how these should be integrated with, or lead to the modification of, existing road rules. In this paper, we analyse the current rules of the road, with a particular focus on the UK's Highway Code, in order to inform future rulemaking. We consider the full range of laws, norms, infrastructures, and technologies that govern interactions on the road and where these came from. The rules have a long history and they contribute to a social order that privileges some modes of mobility over others, reinforcing a culture of automobility that shapes lives, livelihoods and places. The introduction of self-driving vehicles, and the digital code on which they depend, could reorder the culture and concrete of our roads, by flattening the multidimensional rules of the road, hardening rules that are currently soft and standardising across diverse contexts. Future rule changes to accommodate self-driving vehicles may enable increases in safety and accessibility, but the trade-offs demand democratic debate.

Rule Changes in Water Polo – History, FINA 2018 New Rules, and Literature Review

Water polo has recently encountered extensive challenges, including possible banishment from the Olympics. To meet the challenges, major rule changes have been implemented. This perspective is to provide a literature review of the impact of rule changes on water polo gameplay. An emerging and relatively small body of research has demonstrated significantly enhanced game dynamics and outcomes as intended by recent rule changes. The water polo community needs more analytical research on the impact of the latest rule changes approved in 2018.

Rethinking Electoral Reform Processes after the Report of the Electoral Commission on the Review of the MMP Voting System

<p>The 2012 Report of the Electoral Commission on the Review of the MMP system recommended that several changes be made to the way in which future parliaments are elected in New Zealand. The lack of legislative response to the recommendations highlighted an issue inherent in New Zealand’s constitutional arrangements - that changes to electoral rules are designed and enacted by politicians, and there is no mechanism through which citizens can initiate or meaningfully engage with electoral reform processes. This paper looks at whether there is a better way that such proposals for electoral rule changes could be managed, proposing the use of ‘citizen initiated’ Citizens’ Assemblies on Electoral Reform.</p>

Rethinking Electoral Reform Processes after the Report of the Electoral Commission on the Review of the MMP Voting System

<p>The 2012 Report of the Electoral Commission on the Review of the MMP system recommended that several changes be made to the way in which future parliaments are elected in New Zealand. The lack of legislative response to the recommendations highlighted an issue inherent in New Zealand’s constitutional arrangements - that changes to electoral rules are designed and enacted by politicians, and there is no mechanism through which citizens can initiate or meaningfully engage with electoral reform processes. This paper looks at whether there is a better way that such proposals for electoral rule changes could be managed, proposing the use of ‘citizen initiated’ Citizens’ Assemblies on Electoral Reform.</p>

Judging the judges: evaluating the accuracy and national bias of international gymnastics judges

We design, describe and implement a statistical engine to analyze the performance of gymnastics judges with three objectives: (1) provide constructive feedback to judges, executive committees and national federations; (2) assign the best judges to the most important competitions; (3) detect bias and persistent misjudging. Judging a gymnastics routine is a random process, and we model this process using heteroscedastic random variables. The developed marking score scales the difference between the mark of a judge and the true performance level of a gymnast as a function of the intrinsic judging error variability estimated from historical data for each apparatus. This dependence between judging variability and performance quality has never been properly studied. We leverage the intrinsic judging error variability and the marking score to detect outlier marks and study the national bias of judges favoring athletes of the same nationality. We also study ranking scores assessing to what extent judges rate gymnasts in the correct order. Our main observation is that there are significant differences between the best and worst judges, both in terms of accuracy and national bias. The insights from this work have led to recommendations and rule changes at the Fédération Internationale de Gymnastique.

An Updated Technical–Tactical Categorisation in Taekwondo: From General Tactical Objectives to Combat Situations

Taekwondo competition underwent enormous development with the recent introduction of electronic scoring devices and rule changes. Although the competitive model of taekwondo had been previously studied, most of the literature that analyses this model was previous to the introduction of electronic devices or not based on a prior system of categories. Not only are results of an up-to-date taxonomy essential to guarantee the sustainability of future research about taekwondo based on methodological observation, but they are also completely necessary. This article proposes and validates a new categorisation of taekwondoist technical–tactical actions in the competition after the modifications were introduced between Beijing 2008 and Tokyo 2021 qualification events. The association between environmental conditions, tactical objectives, and technical actions determines the defining parameters of the combat situations. To design the category system, a dual methodology was used: in the first stage, an in-depth review of the technical and scientific literature based on observation of combats was carried out. From that review, a synthesis document was produced, which subsequently was used as a basis for canvassing an up-to-date view of the question from expert advisers. The existing terminology and categories were rearranged and updated, establishing new parameters involved in the technical–tactical resources of contest situations. This updated categorisation was tested by using the generalisability theory, revealing excellent-to-perfect observers’ agreement and reliable data. This new categorisation will allow designing precise and sustainable tools over time for methodological observation of taekwondo in future studies.

Diversity promotes abstraction and cognitive flexibility in collective problem solving

Social interaction plays an important role in many contexts of human reasoning and problem solving, and groups are often found to outperform individuals. We suggest that this benefit is associated with the dialogical sharing and integration of diverse perspectives and strategies. Here, we investigated whether diversity in prior experience affects groups’ problem representations and performance. In a game-like experiment, participants categorized aliens based on combinations of their features. Whenever a specific feature combination was learned, the rule changed and a new feature combination had to be learned. However, unbeknown to participants, rule changes were governed by an abstract meta-rule and awareness of this provided an advantage when rules changed. We compared categorization performance between individuals, groups composed of members trained on the same rule, and groups composed of members trained on different rules before entering the collaborative test phase. Following preregistered predictions, groups with diverse task experience outperformed groups with similar task experience, which in turn outperformed individuals. These findings were unaffected diversity in personality (Big Five) and motivational factors, suggesting that diversity in experience plays the key role. We conclude that cognitive diversity impact problem solving by stimulating processes of abstraction and flexibility at the level of the group.

Parliamentary Debates in Canada (1901–2015)

This article analyzes the effect of procedural rule change on the dynamics of parliamentary speeches in the Canadian House of Commons between 1901 and 2015. During this period, several new rules were introduced to reduce the opportunities for private members to speak during the debates so that the government could get its business done within an acceptable amount of time. Our analysis looks at the impact of these rule changes on the content and orientation of all individual speeches made by members of Parliament. The results indicate that parliamentary rules had an important effect on the topic and duration of debates. Our findings also confirm that procedural changes contributed to a heightening of partisan polarization in the Canadian Parliament over time and disproportionately reduced the influence of government backbenchers in the legislative process.