Faster,slower or real time? Perceptual-cognitive skills training with variable video speeds

ObjectiveWe examined whether a short-term, off-field training intervention using different video speed manipulations (i.e., normal speed, 75%, and 125% of normal speed), enhances the offside decision-making performance of international level assistant referees. Moreover, we explored the optimal sequence of various video speed manipulations during training.DesignAll groups were exposed to a pre- and posttest. During acquisition, the assistant referees assessed 60 offside video simulations during three different training sessions. The order of the video speed conditions varied during the training intervention depending on participant group assignment: increasing speed group (n = 33; 75%–100%–125%); decreasing speed group (n = 33; 125%–100%–75%); and arbitrary speed group (n = 30; 100%–75%–125%).ResultsFirst, the decision-making accuracy was higher during the presentation of real time and faster video conditions when compared to the slower video condition. Second, only the decreasing speed group improved their offside decision-making performance from pre- to posttest.ConclusionsWe conclude that scheduling a decreasing video speed sequence throughout training is more beneficial to enhance learning than increasing or arbitrary speed conditions. Although it is too premature to replace existing training protocols that typically use constant speed videos, the present study offers evidence to suggest that training interventions for elite performers that decreasing the speed of exposure during the learning process may have some benefits over regular speed presentations.     

Divergence Behaviour of the Successive Geometric Mean Method of Pairwise Comparison Matrix Generation for a Multiple Stage,Multiple Objective Optimization Problem

This paper focuses on the divergence behaviour of the successive geometric mean (SGM) method used to generate pairwise comparison matrices while solving a multiple stage, multiple objective (MSMO) optimization problem. The SGM method can be used in the matrix generation phase of our three‐phase methodology to obtain pairwise comparison matrix at each stage of an MSMO optimization problem, which can be subsequently used to obtain the weight vector at the corresponding stage. The weight vectors across the stages can be used to convert an MSMO problem into a multiple stage, single objective (MSSO) problem, which can be solved using dynamic programming‐based approaches. To obtain a practical set of non‐dominated solutions (also referred to as Pareto optimal solutions) to the MSMO optimization problem, it is important to use a solution approach that has the potential to allow for a better exploration of the Pareto optimal solution space. To accomplish a more exhaustive exploration of the Pareto optimal solution space, the weight vectors that are used to scalarize the MSMO optimization problem into its corresponding MSSO optimization problem should vary across the stages. Distinct weight vectors across the stages are tied directly with distinct pairwise comparison matrices across the stages. A pairwise comparison matrix generation method is said to diverge if it can generate distinct pairwise comparison matrices across the stages of an MSMO optimization problem. In this paper, we demonstrate the SGM method's divergence behaviour when the three‐phase methodology is used in conjunction with an augmented high‐dimensional, continuous‐state stochastic dynamic programming method to solve a large‐scale MSMO optimization problem. Copyright © 2013 John Wiley & Sons, Ltd.     

“It's Only Other People Who Make Me Feel Black”: Acculturation,Identity, and Agency in a Multicultural Community

This article explores identity work and acculturation work in the lives of British mixed‐heritage children and adults. Children, teenagers, and parents with mixed heritage participated in a community arts project that invited them to deliberate, construct, and reconstruct their cultural identities and cultural relations. We found that acculturation, cultural and raced identities, are constructed through a series of oppositional themes: cultural maintenance versus cultural contact; identity as inclusion versus identity as exclusion; institutionalized ideologies versus agency. The findings point towards an understanding of acculturation as a dynamic, situated, and multifaceted process: acculturation in movement. To investigate this, we argue that acculturation research needs to develop a more dynamic and situated approach to the study of identity, representation, and culture. The article concludes with a discussion on the need for political psychologists to develop methods attuned to the tensions and politics of acculturation that are capable of highlighting the possibilities for resistance and social change.     

Transition to Crisis-Free Development: A Myth or Reality?

This article substantiates the thesis that the outlines of the future and present can be made visible and comprehensible by applying a new methodology for cognition of regularities in the human community development. This methodology made it possible to define that there have been and are only two paradigms of the human system development in the entire multicentury course of the human community development. Cycles, crises, chaos, and all negative phenomena are nothing else but natural products of the second, indirect paradigm of development. The new model of life organization at each local level is at the same time the former, first development paradigm, based on the direct interconnection between production and consumption of specific human beings, but raised onto the new high-tech level. Practical realization of this model is the only feasible precondition for the transition to sustainable and crisis-free development.     

辅助生殖技术的现代性反思——基于传统儒家文化的视角

在现代性语境中,对辅助生殖技术引发的医学现代性危机进行反思无疑具有重要意义.从本质上而言,辅助生殖技术所产生的一系列问题与挑战,深刻地反映出人与自然、人与人、人与社会之间内在的冲突与矛盾.基于传统儒家文化的视角,寻求现代生命技术与传统儒家文化之间相互冲突、交汇、融合、嵌入的对接点,并有针对性地提出应战机制,从而进一步探讨现代性与传统之间的绵延不断的相互作用,深入挖掘传统中蕴含的现代性因素,现代性中间的传统,以更为开放包容的心灵,重视传统与现代性的结合,让科技为人类造福.     

Field Experiments in Religion: A Dream Whose Time Has Come

Field experiments offer powerful tests of causality in real‐world settings. They have high validity—both internal and external—and require smaller inferential leaps than observational or laboratory methods. Nonetheless, they are rarely applied to religion. This article advocates for the frequent use of field experiments in the study of religion. It reviews their methodological advantages, and it identifies various ways that religion can be incorporated into a field experiment design. It proposes multiple strategies for creating feasible, ethical religion field experiments as well as optimizing them. Ultimately, field experiments have the potential to transform the study of religion.