Search results for "VALIDATION"
showing 10 items of 620 documents
La plantilla 3.0, un instrumento para conocer la música de la infancia: Revisión y validación
2015
Este trabajo se interesa por conocer la música de la vida diaria de los niños desde una mirada educativa1. Para estudiarlo el artículo ofrece un instrumento que permite conocer los elementos objetivos de la música que escuchan, prestando especial atención al entorno sonoro de mayor cobertura e impacto, el mediático. El instrumento constituye el paso inicial para estudiar los posibles efectos de la música y proponer alternativas educativas, porque la finalidad última de la investigación es la mejora de la educación. El desarrollo metodológico ha consistido en la creación del instrumento, la plantilla 3.0, y su aplicación, dando cuenta en este artículo de su revisión, características técnicas…
Leadership Scale in football coaches: psychometric and descriptive study
2020
El liderazgo ha sido una de las variables de interés en la psicología aplicada al deporte. El Modelo Multidimensional de Liderazgo de Chelladurai y Saleh (1980) sirvió de base para la creación de la Leadership Sport Scale (LSS). La versión para entrenadores (LSS-3) presenta debate respecto a su estructura factorial y sus valores de fiabilidad. El objetivo de este estudio es ofrecer una solución factorial aceptable para la escala LSS-3 en versión española (Ruiz-Barquín y De la Vega, 2015) en una muestra de 326 entrenadores de fútbol, varones, con edades comprendidas entre los 17 y 59 años y evaluar sus cualidades psicométricas. En segundo lugar, se investigan las posibles diferencias en las …
Leadership Scale in football coaches: psychometric and descriptive study
2020
El liderazgo ha sido una de las variables de interés en la psicología aplicada al deporte. El Modelo Multidimensional de Liderazgo de Chelladurai y Saleh (1980) sirvió de base para la creación de la Leadership Sport Scale (LSS). La versión para entrenadores (LSS-3) presenta debate respecto a su estructura factorial y sus valores de fiabilidad. El objetivo de este estudio es ofrecer una solución factorial aceptable para la escala LSS-3 en versión española (Ruiz-Barquín y De la Vega, 2015) en una muestra de 326 entrenadores de fútbol, varones, con edades comprendidas entre los 17 y 59 años y evaluar sus cualidades psicométricas. En segundo lugar, se investigan las posibles diferencias en las …
Toolbox for Distance Estimation and Cluster Validation on Data With Missing Values
2022
Missing data are unavoidable in the real-world application of unsupervised machine learning, and their nonoptimal processing may decrease the quality of data-driven models. Imputation is a common remedy for missing values, but directly estimating expected distances have also emerged. Because treatment of missing values is rarely considered in clustering related tasks and distance metrics have a central role both in clustering and cluster validation, we developed a new toolbox that provides a wide range of algorithms for data preprocessing, distance estimation, clustering, and cluster validation in the presence of missing values. All these are core elements in any comprehensive cluster analy…
Species distributions models may predict accurately future distributions but poorly how distributions change: A critical perspective on model validat…
2023
Aim: Species distribution models (SDMs) are widely used to make predictions on how species distributions may change as a response to climatic change. To assess the reliability of those predictions, they need to be critically validated with respect to what they are used for. While ecologists are typically interested in how and where distributions will change, we argue that SDMs have seldom been evaluated in terms of their capacity to predict such change. Instead, typical retrospective validation methods estimate model's ability to predict to only one static time in future. Here, we apply two validation methods, one that predicts and evaluates a static pattern, while the other measures change…
Analysis of Relationship between Net Wage and Consumer Price Index
2013
Abstract In the present paper is presented an econometric analysis of the relationship between net salary and consumer price index. After a brief historical overview will be review the calculating statistics for selected variables and coefficients and will be presented the obtained values. We will study the relationship between variables. It will be realized the cloud of points and will be applied Fisher test. The intensity of selected variables will be study too and some forms of relationship between the two chose variables will be done. Student test is applied. It will be performed the parameter estimation for regression functions and Akaike's criterion will be applied. The homoscedastici…
Data from: Fine-scale population dynamics in a marine fish species inferred from dynamic state-space models
2018
Identifying the spatial scale of population structuring is critical for the conservation of natural populations and for drawing accurate ecological inferences. However, population studies often use spatially aggregated data to draw inferences about population trends and drivers, potentially masking ecologically relevant population sub-structure and dynamics. The goals of this study were to investigate how population dynamics models with and without spatial structure affect inferences on population trends and the identification of intrinsic drivers of population dynamics (e.g. density dependence). Specifically, we developed dynamic, age-structured, state-space models to test different hypoth…
Functional Near Infrared Spectroscopy System Validation for Simultaneous EEG-FNIRS Measurements
2019
Functional near-infrared spectroscopy (fNIRS) applied to brain monitoring has been gaining increasing relevance in the last years due to its not invasive nature and the capability to work in combination with other well–known techniques such as the EEG. The possible use cases span from neural-rehabilitation to early diagnosis of some neural diseases. In this work a wireline FPGA–based fNIRS system, that use SiPM sensors and dual-wavelength LED sources, has been designed and validated to work with a commercial EEG machine without reciprocal interference.
Derivation and validation of a novel bleeding risk score for elderly patients with venous thromboembolism on extended anticoagulation
2017
SummaryExisting clinical scores do not perform well in predicting bleeding in elderly patients with acute venous thromboembolism (VTE). We sought to derive an easy-to-use clinical score to help physicians identify elderly patients with VTE who are at high-risk of bleeding during extended anticoagulation (>3 months). Our derivation sample included 743 patients aged ≥65 years with VTE who were enrolled in a prospective multicenter cohort study. All patients received extended anticoagulation with vitamin K antagonists. We derived our score using competing risk regression, with the time to a first major bleeding up to 36 months of extended anticoagulation as the outcome, and 17 candidate var…
Predicting survival after transarterial chemoembolization for hepatocellular carcinoma using a neural network: A Pilot Study.
2019
BACKGROUND AND AIMS Deciding when to repeat and when to stop transarterial chemoembolization (TACE) in patients with hepatocellular carcinoma (HCC) can be difficult even for experienced investigators. Our aim was to develop a survival prediction model for such patients undergoing TACE using novel machine learning algorithms and to compare it to conventional prediction scores, ART, ABCR and SNACOR. METHODS For this retrospective analysis, 282 patients who underwent TACE for HCC at our tertiary referral centre between January 2005 and December 2017 were included in the final analysis. We built an artificial neural network (ANN) including all parameters used by the aforementioned risk scores a…