Validity of the self-report on drug use by university studentes : correspondence between self-reported use and use detected in urine

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Validity of a brief workaholism scale

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On the incremental validity of irrational beliefs to predict subjective well-being while controlling for personality factors

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Elucidación del término “competitividad nacional” y análisis de su medición

El presente trabajo contiene un análisis profundo sobre el concepto de Competitividad Nacional y la pertinencia de su medición. El principal objetivo del estudio es aclarar la esencia de tan trascendental y utilizado término, así como la lógica imperante en los más reconocidos índices de medición de la competitividad de las naciones a nivel mundial. En el capítulo 1 se presentan los primeros pasos en el proceso de elucidación, metodología que se eligió para examinar a fondo el término; incluye la revisión histórica del concepto y las posiciones de reconocidas personalidades en el campo entorno a la definición del mismo. El segundo capítulo contiene un razonamiento personal sobre la naturaleza del término y lo que significa ser competitivo como país y, continuando con la metodología del capítulo anterior, se extraen las ideas clave y comunes de los autores citados para concluir con una propuesta de definición de Competitividad Nacional. El tercer capítulo es una presentación de los índices de medición del Foro Económico Mundial (Reporte Global de Competitividad) y de la escuela de negocios IMD (Anuario Mundial de Competitividad), para culminar esta sección con un análisis comparativo entre ambos. El cuarto capítulo es un análisis crítico sobre la validez de estos índices. Por último, el lector encontrará las conclusiones y reflexiones finales de la investigación.

Validity and reliability pie

Validity and reliability pie animation for display in RM&EBP

Face and content validity of smoking-related and matched control pictures

Smoking-related pictures and matched controls are useful tools in experimental tasks of attentional bias. Noteworthy the procedures used to produce and validate these pairs of pictures are poorly reported. This study aimed to describe the production and evidence of validity of a set of smoking-related pictures and their matched controls. Two studies were conducted to assess validity. An online internet-based survey was used to assess face validity of 12 pictures related to smoking behavior and 12 matched controls. All pictures were colored and were 95mm length x 130mm width. Participants were asked if the pictures were related or not to the smoking behavior and also rated how much each picture was related to smoking behavior. The second study investigated attentional bias in smokers (n = 47) and non-smokers (n = 50), and examined how they assessed all pictures in terms of pleasantness and the 12 smoking-related pictures in terms of relevance to their own smoking behavior. Craving was assessed before and after the experiment. Results indicate that this set of pictures are valid since smoking-related pictures were considered more related to smoking behavior compared to their matched controls. Moreover, smokers showed greater attentional bias for smoking-related pictures than non-smokers. Craving and relevance of the smoking-related pictures were higher in smokers than in non-smokers. Smokers considered smoking-related pictures them less unpleasant than non-smokers. These findings provide evidence of face and content validity of this set of pictures, which will be available to researchers, contributing to maximize the standardization of future investigations.

Assessment of construct validity and reliability of the inventory of masculinity and femininity in adolescents and young adults Colombian

This study evaluated the construct validity and reliability of Femininity and Masculinity Inventory-Imafe (Lara, 1993), and calculated standardized punctuations for Colombian teenagers and young adults. Participants were 1527 male and female, between 15 and 42. The general and scale reliability was evaluated through Alfa and Guttmann coefficients, and the factor analysis was used to estimate the construct validity. Standardized punctuations were obtained for gender, since there were statistically significant differences for sex in the six scales of the instrument. The inventory presented reliability values that oscillated between .76 and .88, and the factorial analysis showed three factors coherent with the factors found in its original validation. Correlacional inter-scales analysis and sex-differences were theoretically consistent.

Productivity growth in electric energy retail in Colombia. A bootstrapped malmquist indices approach

This paper offers a productivity growth estimate for electric energy commercialization firms in Colombia, using a non-parametric Malmquist bootstrap methodology. The estimation and methodology serve two main purposes. First, in Colombia Commercialization firms are subject to a price-cap regulation scheme, a non-common arrangement in the international experience for this part of the industry. Therefore the paper’s result suggest an estimate of the productivity factor to be used by the regulator, not only in Colombia but in other countries where commercialization is a growing part of the industry (renewable energy, for instance). Second, because of poor data collection from regulators and firms themselves, regulation based on a single estimation of productivity seems inappropriate and error-prone. The nonparametric Malmquist bootstrap estimation allows an assessment of the result in contrast to a single one estimation. This would open an opportunity for the regulator to adopt a narrower and more accurate productivity estimation or override an implausible result and impose a productivity factor in the price-cap to foster the development of the industry.

Modelacion del Efecto del Día de la Semana para los Indices Accionarios de Colombia mediante un Modelo STAR GARCH.

En este trabajo se estudia el comportamiento de los retornos de los tres principales índices bursátiles de Colombia: el IBB de la Bolsa de Bogotá, el IBOMED de la Bolsa de Medellin, y el IGBC de Bolsa de Valores de Colombia. A través de un modelo STAR GARCH se identifican dos estados o regiones extremos; mientras en el primero los rendimientos de los índices son, en términos absolutos, bajos y los procesos son estacionarios, en el segundo se tienen grandes pérdidas o ganancias, donde los efectos de los choques son permanentes. Aunque en cada uno de los regímenes el efecto del día de la semana es diferente, los resultados indican que para los tres índices existe un efecto del día de la semana en la media, y un efecto del día en la varianza para la Bolsa de Bogotá y Bolsa de Valores de Colombia. Los resultados contradicen la hipótesis de un mercado de acciones efciente en información.

Adecuación curricular del diagnóstico y la evaluación en matemáticas = Curricular validity of assessment and evaluation instruments in mathematics.

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Validity of a reading comprehension test for Portuguese students

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Validity evidence based on test content

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Validity evidence based on internal structure

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Demonstrating the validity of three general scores of PET in predicting higher education achievement in Israel

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Validity evidence based on testing consequences

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