Multilevel multitrait-multimethod model: application to the measurement of egocentered social networks

Our goal in this paper is to assess reliability and validity of egocentered network data using multilevel analysis (Muthen, 1989, Hox, 1993) under the multitrait-multimethod approach. The confirmatory factor analysis model for multitrait-multimethod data (Werts & Linn, 1970; Andrews, 1984) is used for our analyses. In this study we reanalyse a part of data of another study (Kogovšek et al., 2002) done on a representative sample of the inhabitants of Ljubljana. The traits used in our article are the name interpreters. We consider egocentered network data as hierarchical; therefore a multilevel analysis is required. We use Muthen's partial maximum likelihood approach, called pseudobalanced solution (Muthen, 1989, 1990, 1994) which produces estimations close to maximum likelihood for large ego sample sizes (Hox & Mass, 2001). Several analyses will be done in order to compare this multilevel analysis to classic methods of analysis such as the ones made in Kogovšek et al. (2002), who analysed the data only at group (ego) level considering averages of all alters within the ego. We show that some of the results obtained by classic methods are biased and that multilevel analysis provides more detailed information that much enriches the interpretation of reliability and validity of hierarchical data. Within and between-ego reliabilities and validities and other related quality measures are defined, computed and interpreted

Anàlisi de les revistes indexades al Journal of Citation Reports del Social Science Citation Index. Període 1997-2005

En aquest estat de la qüestió, s’hi presenten els resultats d’una anàlisi sobre l’evolució i les característiques principals de les revistes de geografia incloses al Journal of Citation Reports dins de la versió del Social Science Citation Index i, per tant, amb factor d’impacte. El període d’estudi escollit ha estat el que va de 1997 a 2005, és a dir, al llarg dels darrers nou anys amb dades disponibles. En total, hi han aparegut incloses trenta-nou revistes, una bona part de les quals ha romàs a la llista durant tot el temps estudiat. Hi ha hagut deu publicacions que han estat situades entre les cinc amb més factor d’impacte de cada any, i cap no ha estat la primera més de dos anys seguits. S’han trobat divuit temàtiques diferents en el conjunt de les revistes, en destaquen les de caire generalista i les de geografia econòmica i regional. Una gran majoria dels volums està publicada per editorials, Blackwell Publishing n’és la més destacada. L’origen de les revistes és clarament anglosaxó, només n’hi trobem dues d’escrites en una altra llengua. La segona part de l’article descriu totes les publicacions contemplades en els nou anys estudiats, amb una petita ressenya de cadascuna

Public and student awareness science: recreational science as a catalyst

When discussing the traditional and new missions of higher education (1996 Report to UNESCO of the International Commission on Education for the 21st Century) Jacques Delors stated that "Excessive attraction to social sciences has broken equilibrium of available graduates for workforce, thus causing doubts of graduates and employers on the quality of knowledge provided by higher education". Likewise, when discussing the progress of science and technology, the 1998 UNESCO World Conference on Higher Education concluded that "Another challenge concerts the latest advancements of Science, the sine qua non of sustainable development"; and that “with Information Technology, the unavoidable invasion of virtual reality has increased the distance between industrial and developing countries". Recreational Science has a long tradition all over the Educational World; it aims to show the basic aspects of Science, aims to entertain, and aims to induce thinking. Until a few years ago, this field of knowledge consisted of a few books, a few kits and other classical (yet innovative) ways to popularize the knowledge of Nature and the laws governing it. In Spain, the interest for recreational science has increased in the last years. First, new recreational books are being published and found in bookstores. Second the number of Science-related museums and exhibits is increasing. And third, new television shows are produced and new short science-based, superficial sketches are found in variety programs. However, actual programs in Spanish television dealing seriously with Science are scarce. Recreational Science, especially that related to physical phenomena like light or motion, is generally found at Science Museums because special equipment is required. On the contrary, Science related mathematics, quizzes and puzzles use to gather into books, e.g. the extensive collections by Martin Gardner. However, lately Science podcasts have entered the field of science communication. Not only traditional science journals and television channels are providing audio and video podcasts, but new websites deal exclusively with science podcasts, in particular on Recreational Science. In this communication we discuss the above mentioned trends and show our experience in the last two years in participating at Science Fairs and university-sponsored events to attract students to science and technology careers. We show a combination of real examples (e.g., mathemagic), imagination, use of information technology, and use of social networks. We present as well an experience on designing a computational, interactive tool to promote chemistry among high school, prospective students using computers ("Dancing with Bionanomolecules"). Like the concepts related to Web 2.0, it has been already proposed that a new framework for communication of science is emerging, i.e., Science Communication 2.0, where people and institutions develop new innovative ways to explain science topics to diverse publics – and where Recreational Science is likely to play a leading role

La adolescencia: retos para la investigación y para la sociedad europea de cara al sigol XXI

A lo largo de la última década, la adolescencia ha sido un tema de discusión política en distintos espacios europeos al más alto nivel. En una sociedad aceleradamente cambiante se percibe que la adecuada socialización de las generaciones más jóvenes constituye un reto socio-histórico que nos afecta a todos. Los cambios en que estamos sumergidos son tan plurales (demográficos, sociales, tecnológicos, económicos, políticos, etc.) que generan un amplísimo frente de nuevos dilemas éticos. La opinión de los ciudadanos de la Unión Europea se muestra preocupada por nuevos valores y destaca la preferencia por la responsabilidad en coherencia con dicha situación cambiante. Todo este macrocontexto psicosocial viene planteando nuevos retos teóricos y de investigación a la comunidad científica. De hecho las ciencias humanas y sociales han empezado a desarrollar nuevas líneas de investigación para comprender mejor las nuevas relaciones entre adultos y adolescentes y las nuevas culturas que emergen entre estos últimos, impulsadas por nuevas aspiraciones sociales compartidas por grupos más o menos amplios de la población joven. El desarrollo de técnicas e instrumentos que nos permitan comprender mejor la perspectiva del adolescente se hace más evidente si analizamos su relación con las nuevas tecnologías de la información y la comunicación. Dichas tecnologías comportan nuevos riesgos, pero también nuevas oportunidades, entre las que destaca la posibilidad de establecer nuevas formas de relación. La motivación que muestran los más jóvenes por las nuevas tecnologías constituye un gran reto a los investigadores aplicados para sugerir formas de maximizar las potencialidades latentes

Networks of PhD Students and Academic Performance: A Comparison across Countries

In this article we compare regression models obtained to predict PhD students’ academic performance in the universities of Girona (Spain) and Slovenia. Explanatory variables are characteristics of PhD student’s research group understood as an egocentered social network, background and attitudinal characteristics of the PhD students and some characteristics of the supervisors. Academic performance was measured by the weighted number of publications. Two web questionnaires were designed, one for PhD students and one for their supervisors and other research group members. Most of the variables were easily comparable across universities due to the careful translation procedure and pre-tests. When direct comparison was not possible we created comparable indicators. We used a regression model in which the country was introduced as a dummy coded variable including all possible interaction effects. The optimal transformations of the main and interaction variables are discussed. Some differences between Slovenian and Girona universities emerge. Some variables like supervisor’s performance and motivation for autonomy prior to starting the PhD have the same positive effect on the PhD student’s performance in both countries. On the other hand, variables like too close supervision by the supervisor and having children have a negative influence in both countries. However, we find differences between countries when we observe the motivation for research prior to starting the PhD which increases performance in Slovenia but not in Girona. As regards network variables, frequency of supervisor advice increases performance in Slovenia and decreases it in Girona. The negative effect in Girona could be explained by the fact that additional contacts of the PhD student with his/her supervisor might indicate a higher workload in addition to or instead of a better advice about the dissertation. The number of external student’s advice relationships and social support mean contact intensity are not significant in Girona, but they have a negative effect in Slovenia. We might explain the negative effect of external advice relationships in Slovenia by saying that a lot of external advice may actually result from a lack of the more relevant internal advice

Cartografías simbólicas para la cultura y el desarrollo

El presente trabajo tiene como punto de partida la convicción que es necesario explorar nuevos marcos teóricos y metodológicos para la producción de conocimiento sobre las múltiples relaciones de la cultura con el desarrollo. Para tal efecto revisa la naturaleza polisémica del concepto cultura, su tratamiento por las ciencias sociales y la economía y su concepción actual como explicación última de toda actividad humana. Subraya la necesidad de generar un conocimiento propio del campo cultural que adopte renovadas concepciones y bases epistemológicas provenientes de las artes y las humanidades que privilegian lo intuitivo, lo individual frente a lo colectivo. La revisión de fuentes provenientes de la filosofía permite una lectura y un enfoque reformado de la naturaleza de la cultura que cuestiona la clásica concepción antropológica que reduce lo religioso a una expresión cultural. Los argumentos presentados exponen que en toda forma cultural está implícita una particular cosmovisión, una visión de la vida; una valoración del mundo que se conecta con el significado último de la existencia humana que es de naturaleza religiosa. Todas las comunidades culturales tienen en su haber una serie de prácticas, tradiciones, usos, costumbres, expresiones creativas que dan cuenta de una identidad particular y que son registradas a través de mapeos culturales y sistemas de información. El texto hace referencias a políticas y programas culturales sobre cultura y desarrollo en la región centroamericana