Performance analysis of elite men’s and women’s wheelchair basketball teams

Abstract

The purpose of the present study was to identify which game-related statistics discriminate winning and losing teams in men’s and women’s elite wheelchair basketball. The sample comprised all the games played during the Beijing Paralympics 2008 and the World Wheelchair Basketball Championship 2010. The game-related statistics from the official box scores were gathered and data were analysed in 2 groups: balanced games (final score differences ≤12 points) and unbalanced games (final score differences >13 points). Discriminant analysis allowed identifying the successful 2-point field-goals and free-throws, the unsuccessful 3-point field-goals and free-throws, the assists and fouls received as discriminant statistics between winning and losing teams in men’s balanced games. In women’s games, the teams were discriminated only by the successful 2-point field-goals. Linear regression analysis showed that the quality of opposition had great effects in final point differential. The field-goals percentage and free-throws rate were the most important factors in men’s games, and field-goals percentage and offensive rebounding percentage in women’s games. The identified trends allow improving game understanding and helping wheelchair basketball coaches to plan accurate practice sessions and, ultimately, deciding better in competition.     

Effects of elements or compound preexposure on conditioned taste aversion as a function of retention interval

The effects of element or compound preexposure and retention interval were examined in three experiments with the taste-aversion paradigm. In Experiment 1, preexposure to the elements of a compound flavor produced less latent inhibition to the compound than did preexposure to the compound itself when a 1-day preexposure-conditioning interval was used. However, preexposing the elements or the compound resulted in equivalent latent inhibition effects when a 21-day retention interval was used. In Experiment 2, a similar pattern of results was observed when the conditioning-test interval was manipulated. Experiment 3 explored the effect of element or compound preexposure when preexposure and test were carried out in different contexts. Attenuated latent inhibition following preexposure to the elements was found when preexposure and test were carried out in the same context. In contrast, preexposure to the elements resulted in as much latent inhibition as did preexposure to the compound when the context was switched from preexposure to testing. The implications of these findings for a retrieval-oriented view of latent inhibition are discussed.     

Exploring affiliation network models as a collaborative filtering mechanism in e-learning

The online interaction of learners and tutors in activities with concrete objectives provides a valuable source of data that can be analyzed for different purposes. One of these purposes is the use of the information extracted from that interaction to aid tutors and learners in decision making about either the configuration of further learning activities or the filtering of learning resources. This article explores the use of an affiliation network model for such kind of purposes. Concretely, the use of techniques such as blockmodeling – a technique used to derive meaningful patterns of relationships in the network – and the analysis of m-slices – a technique helpful to study cohesion in relationships – are explored as tools to decide on the configuration of topics and/or learner groups. In particular, the results of the case study show that such techniques can be used to (i) filter participants for rearranging groups; (ii) rearrange topics of interest; and (iii) dynamically change the structure of a course. The techniques presented can be considered a case of collaborative filtering based on social network structure.     

Knowledge and Attitudes Towards Biotechnology of Elementary Education Preservice Teachers: The first Spanish experience

Due to the important impact that biotechnology has on current Western societies, well-informed critical citizens are needed. People prepared to make conscious decisions about aspects of biotechnology that relate to their own lives. Teachers play a central role in all education systems. Thus, the biotechnological literacy of preservice teachers is an important consideration as they will become an influential collective as future teachers of the next generation of children. The attitudes toward science (and biotechnology) that teachers have affect their behavior and influence the way they implement their daily practice of science teaching in school. This study analyzes the attitudes and knowledge of Spanish preservice teachers toward biotechnology. We designed a new survey instrument that was completed by 407 university students who were taking official degree programs in preschool and primary education. Our results point out that although they are aware of biotechnology applications, topics concerning the structure of DNA, management of genetic information inside the cell, genetically modified organism technology and the use of microorganisms as biotechnological tools were not correctly answered. According to our attitude analysis, Spanish preservice teachers could be defined as opponents of genetically modified product acquisition, supporters of biotechnology for medical purposes and highly interested in increasing their knowledge about biotechnology and other scientific advances. Our results show a positive correlation between better knowledge and more positive attitudes toward biotechnology. A Spanish preservice teacher with positive attitudes toward biotechnology tends to be a student with a strong biology background who scored good marks in our knowledge test.     

What do science teachers think about developing scientific competences through context-based teaching? A case study

ABSTRACT

In this paper we explore the views and opinions of four secondary education science teachers regarding the teaching of scientific competences. Their views were gathered in the context of a training programme in which they had to design, implement, and assess their own teaching unit for developing students’ scientific competences by means of context-based learning. Analysis of the data yielded a set of 14 categories distributed across 5 areas: scientific competence and context-based teaching; the teacher and his/her professional environment; implementation in the classroom; development of the teaching unit; and assessment. This process also identified the aspects which teachers believed either facilitated or acted as an obstacle to the development of scientific competences through context-based teaching. We discuss the implications of our findings and suggest ways in which a shift towards a context-based approach to teaching scientific competences can best be achieved, and consider a series of factors related to teachers’ professional identity that may influence this process.     

Cultural factors in decision-making about child physical abuse: identifying reporter characteristics influencing reporting tendencies

OBJECTIVE: This study examined cultural factors that may influence child physical abuse reporting. Relevant cultural factors such as the respondents' ethnic identity and corporal punishment acceptability were investigated as proximal variables of ethnicity that affect child physical abuse reporting tendencies. METHOD: Participants consisted of 378 Caucasian, Hispanic, and African American college students. Participants read 12 vignettes that varied the ethnicity of the child and described a parent using physical punishment with the child. Participants' level of ethnic identity and their acceptance of different discipline practices were also assessed. Data were analyzed using multiple regression procedures. RESULTS: The ethnicity of the respondent was a significant predictor of reporting tendencies for African American respondents only. For African Americans, higher levels of ethnic identity and acceptance of corporal punishment were significant mediators of reporting tendencies, which influenced the relationship between ethnicity and likelihood to report a child of the same ethnicity. CONCLUSION: The results of this study indicate that ethnic minorities may not share similar cultural values and may differ in their degree of adherence to certain cultural variables. These results demonstrate how cultural variables that influence reporting tendencies may not apply across ethnic groups. Therefore, specifying relevant cultural variables is essential to understanding the relationship between ethnicity and reporting tendencies.