Search results for "Methodology"
showing 10 items of 852 documents
Gender differences in technical-tactical behaviour of La Liga Spanish football teams
2021
[Abstract] The aim of this study was to identify differences in technical-tactical behaviour between the men and women first division football teams of the Spanish league, to this end 68 matches corresponding to 2016/17 season were analysed. A comparative analysis of the medians was carried out using the Mann-Whitney U-tests were conducted as post hoc tests. The size effect of this test was calculated and, finally, we performed a grouping of the variables through the clustering bootstrapping technique in both groups. We have detected statistically significant differences (p <0.01) regarding all accurate passes, in favour of men, as well as a greater number of yellow cards. In female footbal…
Measuring innovation in tourism from the Schumpeterian and the dynamic-capabilities perspectives
2012
This paper offers a diagnosis of the “state of the issue” regarding the measurement of innovation in the tourism industry at the company level, and some recommendations for overcoming identified problems. The study addresses two central issues: how existing secondary databases of innovative activity define the boundaries of the tourism industry, and the degree to which these databases reflect the particular characteristics of this economic activity. It is concluded that these analyses present serious biases and anomalies hindering the understanding of the situation at the micro level and complicating the issue of international comparability, and the analyses do not capture the internal hete…
Le problème du réalisme des hypothèses en économie politique
2010
This is a version, slightly corrected in 2010 with regard to form, of a working paper produced in 1968. Its subject is the problem of the realism of assumptions in economics. It offers an interpretation of Milton Friedman's famous essay of 1953 in which, contrary to most discussions, Friedman's solution to the problem does make sense. Under that interpretation, Friedman does not assert that one should test the consequences of a theory but not its assumptions, that one can predict but not explain, or that individuals behave as if they were rational and firms as if they maximized profits. Such assertions do not make sense and ascribing them to Friedman makes criticism of his position much too…
La hora de la evaluación ambulatoria [Recurso electrónico] = The time of ambulatory assessment /
2022
La evaluación ambulatoria aglutina un conjunto de métodos que permiten evaluar mediante dispositivos móviles, y en múltiples momentos temporales, el comportamiento de las personas en su entorno natural y contexto diario. Permite una evaluación más precisa, dinámica, contextual e ideográfica que los métodos clásicos, abriendo nuevos horizontes con claras implicaciones para el diagnóstico y la intervención psicológica. El objetivo de este trabajo es realizar una introducción a la evaluación ambulatoria. En primer lugar, se realiza una delimitación conceptual y se comentan las cuestiones que viene a solucionar y sus posibles beneficios. En segundo lugar, se exponen aspectos relacionados con la…
Defining and Operationalizing Appropriation for Science Learning
2014
The overarching goal of this paper is to contribute to our understanding of the interplay between students’ disciplinary engagement and their identity construction. The term appropriation, borrowed from scholars in linguistics and education, was chosen to capture this broader sense of productive learning that sits at the nexus of disciplinary engagement and identity. Appropriation implies productive learning including deep conceptual understanding, but it also involves a reflexive process of populating scientific discourse with personal intentions, purposes and tastes that allow a student to embody scientific discourse and concepts in a way that is authentic and personal. The core aim of th…
UNCLES: Method for the identification of genes differentially consistently co-expressed in a specific subset of datasets
2015
Background Collective analysis of the increasingly emerging gene expression datasets are required. The recently proposed binarisation of consensus partition matrices (Bi-CoPaM) method can combine clustering results from multiple datasets to identify the subsets of genes which are consistently co-expressed in all of the provided datasets in a tuneable manner. However, results validation and parameter setting are issues that complicate the design of such methods. Moreover, although it is a common practice to test methods by application to synthetic datasets, the mathematical models used to synthesise such datasets are usually based on approximations which may not always be sufficiently repres…
Multivariate analysis of defensive phase in football: Identification of successful behavior patterns of 2014 Brazil FIFA World Cup
2021
The aim of this study was to identify variables associated with direct recovery of the ball during defensive transitions in elite soccer and to propose a model with certain guarantees of success based on a multivariate analysis in which binary logistic regression was used to explore interaction between variables. 1,722 defensive transitions were analysed in the final stages of the FIFA World Cup 2014 in Brazil and investigated the following variables: duration of defensive transition; possession loss zone; position of players at the start and end of the defensive transitions, defensive organization, general defensive approach, period of the match, position of defence line, zone in which the…
Technical-Tactical Actions Used to Score in Taekwondo: An Analysis of Two Medalists in Two Olympic Championships
2019
Research in taekwondo has traditionally focused on specific aspects athletes' overall technical and tactical skills, while ignoring other important issues such as identifying how successful athletes score points. The aim of the current study was to follow two medalists through two Olympic Championships (2012 and 2016) to discover the effective patterns associated with scoring in taekwondo using an observational methodology. An ad-hoc taekwondo observational tool was used to codify the actions performed by the athletes. An observational descriptive and multivariate analysis of 1,688 actions performed by the athletes was conducted. A lag sequential and polar coordinate analysis was performed …
Single-trial Connectivity Estimation through the Least Absolute Shrinkage and Selection Operator.
2019
Methods based on the use of multivariate autoregressive models (MVAR) have proved to be an accurate tool for the estimation of functional links between the activity originated in different brain regions. A well-established method for the parameters estimation is the Ordinary Least Square (OLS) approach, followed by an assessment procedure that can be performed by means of Asymptotic Statistic (AS). However, the performances of both procedures are strongly influenced by the number of data samples available, thus limiting the conditions in which brain connectivity can be estimated. The aim of this paper is to introduce and test a regression method based on Least Absolute Shrinkage and Selecti…
Information Dynamics Analysis: A new approach based on Sparse Identification of Linear Parametric Models*
2020
The framework of information dynamics allows to quantify different aspects of the statistical structure of multivariate processes reflecting the temporal dynamics of a complex network. The information transfer from one process to another can be quantified through Transfer Entropy, and under the assumption of joint Gaussian variables it is strictly related to the concept of Granger Causality (GC). According to the most recent developments in the field, the computation of GC entails representing the processes through a Vector Autoregressive (VAR) model and a state space (SS) model typically identified by means of the Ordinary Least Squares (OLS). In this work, we propose a new identification …