Resisting Assimilation: Deliberate Acculturation by the American English Language Learner

Education policy has historically been viewed as having an influential part in crafting the roles of immigrants in American society. However, while policy makers continue to push their own agendas on English language learners (ELLs), ELLs continue to push back to create their own sense of what it means be an American. This article analyzes how formal and informal language policies have historically driven the instruction of ELLs and argues that despite attempts to enculturate and/or assimilate ELLs into American schools through strict English instruction, students employ a variety of cultural resources to act agentically in their acculturation.     

Comparison of the reliability and validity of scores from two concept‐mapping techniques*

This paper reports the results of a study that compared two concept‐mapping techniques, one high‐directed, “fill‐in‐the‐map,” and one low‐directed, “construct‐a‐map‐from‐scratch.” We examined whether: (1) skeleton map scores were sensitive to the sample of nodes or linking lines to be filled in; (2) the two types of skeleton maps were equivalent; and (3) the two mapping techniques provided similar information about students' connected understanding. Results indicated that fill‐in‐the‐map scores were not sensitive to the sample of concepts or linking lines to be filled in. Nevertheless, the fill‐in‐the‐nodes and fill‐in‐the‐lines techniques were not equivalent forms of fill‐in‐the‐map. Finally, high‐directed and low‐directed maps led to different interpretations about students' knowledge structure. Whereas scores obtained under the high‐directed technique indicated that students' performance was close to the maximum possible, the scores obtained with the low‐directed technique revealed that students' knowledge was incomplete compared to a criterion map. We concluded that the construct‐a‐map technique better reflected differences among students' knowledge structure. © 2001 John Wiley & Sons, Inc. J Res Sci Teach 38: 260–278, 2001     

Prediction of abandonment in Spanish fitness centres

Research question: The increase of physical exercise in fitness centres has turned these facilities in important active lifestyle promoters. However, only between 30% and 60% of subscribers still linked to the sports centre after a year. The aim of this study is to design a model to predict the drop out in fitness centres. Research methods: Monthly data corresponding to the actual behaviour of 14,522 members of three sport centres in Spain were recorded over the course of one year. In order to calculate the likelihood of drop out, logistic regressions were used to create predictive models for each centre. Results and findings: It was possible to predict abandonment of users of sport centres from their historical behaviour, although the predictive models obtained for each centre were not completely coincident. The effectiveness of the models was around 70%. Implications: The analysis of users’ behaviour in a fitness centre can allow to avoid the drop out and therefore the abandonment of physical activity. Segmenting the customers based on the likelihood of drop out may be useful for improving the effectiveness of the strategies of loyalty and for optimizing the organization of human and material resources.     

Open data visualizations and analytics as tools for policy-making

Government agencies collect large amounts of structured and unstructured data. Although these data can be used to improve services as well as policy processes, it is not always clear how to analyze the data and how to glean insights for policy making, especially when the data includes large volumes of unstructured text data. This article reports opinions found in “We the People” petition data using topic modeling and visual analytics. It provides an assessment of the usability of the visual analytics results for policy making based on interviews with data professionals and policy makers. We found that visual analytics have potentially positive impacts on policy making practices. Experts also articulated potential barriers regarding the adoption of visual analytics tools, and made suggestions. Potential barriers included insufficient resources in government agencies and difficulty integrating analytics with current work practices. The main suggestions involved providing training and interpretation guidelines along with the visual analytics tools. Major contributions of this study include: (1) suggesting viable visualization tools for analyzing textual data for policy making, and (2) suggesting how to lower barriers to adoption by increasing usability.     

Analysis of football game-related statistics using multivariate techniques

Abstract

The purpose of this study was to explore football game-related statistics during a competition, using principal component and cluster analyses to determine if it is possible to distinguish the winning teams from the drawing and losing ones. We collected the game-related statistics of the group phase matches of the 2006 World Cup and organised them into a matrix. The principal components of the covariance matrix were calculated. The scores of the first and second components were used to represent the new data, and cluster analysis was applied to separate the elements in two groups (G1 and G2). To analyse the degree of separation between the groups, we calculated the Silhouette Coefficient for each group. Finally, we checked if the winning teams were classified into the same group. The Silhouette Coefficients found for G1 and G2 were 0.54 and 0.55, respectively. Results showed that 70.3% of the winning teams were classified into the same group (G1). Similarly, 67.8% of the drawing and losing teams were classified in G2. This study presented a different way to analyse game-related statistics that allowed the multivariate differences to be shown between successful and unsuccessful teams.     

Financial condition of Brazilian soccer clubs: an overview

In Brazil, the transition to corporate management of soccer clubs started in the 1990s. When the ‘Lei Pelé’ was enacted in 1998, expectations were very high that the Brazilian clubs would become modernized institutions capable of surviving in the recently developed soccer business. However, the results that clubs reported in their financial statements a decade later do not show the desirable evolution. This essay looks back at this modernization process while analysing the clubs’ results and their financial ratios with the aim of understanding their main difficulties and how successful they have been in trying to modernize.     

The moderating role of internal and external resources on the performance effect of multitasking: Evidence from the R&D performance of surgeons

R&D employees frequently must split their limited time between explorative R&D and exploitative operative tasks. This article explores the influence of this multitasking (pursuing both R&D and operations) on employee R&D performance. The article also analyzes how the relationship between multitasking and individual R&D performance interacts with the degree of access to internal and external resources. We hypothesize that multitasking positively affects R&D performance. Furthermore, we assume that the internal resources (funding, facilities, and support) are increasingly relevant when employees combine R&D and operative activities. However, multitasking employees may show less of a need for external resources (access to networks) in comparison to more focused colleagues. The results of a survey of 332 surgeons from 20 academic medical centers in Germany support our hypotheses. We conclude that managers should ensure that their R&D workforce is also involved in daily operations. Output will be optimized if these employees are not only engaged with explorative tasks but are also involved in exploitative activities. However, managers should also ensure that the appropriate organizational support is provided to individuals who attempt to combine exploration and exploitation. Multitasking individuals benefit the most from access to internal resources, whereas external resources are more efficiently allocated to explorative-only employees.