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Resumen: Investigadores e instituciones han venido mostrando en los úl-timos años una creciente preocupación por el uso de Internet entre los adolescentes. Su impacto a nivel psicológico y conductual se traduce a menudo en la aparición de conductas de riesgo, fracaso escolar y problemas familiares. Habida cuenta del interés que el tema despierta a diferentes niveles, este trabajo se plantea con una doble intención: (1) disponer de datos que permitan conocer desde un punto de vista descriptivo cuáles son las actitudes, percepciones y hábitos de uso de Internet y las redes sociales entre los adolescentes y, (2) profundizar en su comprensión, contribuyendo así al diseño de estrategias que favorezcan un uso más racional y saludable de la Red. Sobre una encuesta a la población de escolares de Enseñanza Secundaria Obligatoria de la comunidad gallega, en la que participaron un total de 2339 individuos, los resultados obtenidos permiten constatar el alto grado de implantación de Internet en la población objeto de estudio y calibrar con datos empíricos la magnitud del problema. A pesar de que las cifras obtenidas no justifican una actitud alarmista, sí advierten de la necesidad de poner en marcha planes de acción concretos de manera inmediata. Palabras clave: Internet; redes sociales; adolescentes; nuevas tecnologías; ciberdependencia.Title: Attitudes, perceptions and Internet and social networks use among Galician (Spain) teens. Abstract: Researchers and institutions have shown an increasing concern about how adolescents might misuse the Internet. Its psychological and behavioral impact often translate into the emergence of risk behaviors, school failure and family problems. Given the interest that this issue has generated on an increasingly wider scale, the aim of this paper is twofold:(1) to provide data to determine, from a descriptive point of view, what exactly are the attitudes, perceptions and habits of adolescent Internet and social networks use and (2) a deeper understanding of the issue, contributing to the design of prevention and control strategies which will encourage a more rational and healthy Net use. On the basis of a survey of Compulsory Secondary School students from Galicia, which involved a total of 2339 individuals, the results obtained demonstrate the high level of Internet use penetration among the studied population and make it possible to gauge the magnitude of the problem with empirical data. Although the obtained numbers do not justify an alarmist attitude, they do indicate the need to implement specific action plans immediately. Key words: Internet; social networks; adolescents; new technologies; ciberdependence. IntroducciónHoy en día resulta difícil pensar en una sociedad sin las nuevas tecnologías. La telefonía móvil, Internet y las redes sociales tienen una presencia en nuestras vidas que no podría-mos imaginar hace tan solo una década. La realidad pone de manifiesto el papel que dichas herramientas han adquirido en el día a día de niños, adolescentes, jóvenes, adultos y mayores. Los dat...

The opportunities and challenges related to Internet use continue to grow, as well as the social concern around problematic Internet use (PIU), online risky behaviors, and the intensive use of Internet, mainly among adolescents. The aim of this study was to conduct a general screening of PIU in a large sample of school-based adolescents in Spain (n = 40,955), providing updated prevalence data of PIU and different online risky practices, as well as rates of Internet and social network use. Differences between problematic and nonproblematic users were explored in terms of demographics, parental control, and motivations for using. The association between PIU and the involvement in other online risky behaviors was also analyzed, as well as the role of intensive use. The findings show that the global prevalence of PIU among Spanish adolescents is 16.3 percent although this is higher among females, those in their late teens, intensive users, and those without parental control. Logistic regression confirmed that both PIU and intensive use are risk factors for being involved in any online risky behavior. A tentative explanation could be that there is a common deficit of personal and social skills underlying PIU, intensive use, and most online risky practices. From our perspective, value-based education and life skills training are the best way to reach responsible and sensible use of Internet among adolescents. Parents, schools, institutions, and adolescents themselves are called upon to actively engage in facing this problem.

Several debates have emerged across the literature about the conceptualisation of active ageing. The aim of this study is to develop a model of the construct that is focused on the individual, including different elements of people's lives that have the potential to be modified by intervention programs. Moreover, the paper examines the contributions of active ageing to life satisfaction, as well as the possible predictive role of coping styles on active ageing. For this purpose, a representative sample of 404 Galician (Spain) community-dwelling older adults (aged ≥60 years) were interviewed using a structured survey. The results demonstrate that the proposed model composed of two broad categories is valid. The model comprises status variables (related to physical, psychological, and social health) as well as different types of activities, called processual variables. This model is tested using partial least squares (PLS) regression. The findings show that active ageing is a fourth-order, formative construct. In addition, PLS analyses indicate that active ageing has a moderate and positive path on life satisfaction and that coping styles may predict active ageing. The discussion highlights the potential of active ageing as a relevant concept for people's lives, drawing out policy implications and suggestions for further research.

For much human activity there exists a 'lateral preference', that is a tendency to use one side of the body or the other; with respect to the hands for example, the vast majority of individuals have a preference for either the right or left hand. Most experts agree that mastication is no exception in that there is a 'preferred chewing side' but the determination of this preference is somewhat complex. This research analyses the mastication of 60 healthy subjects by means of preferred chewing side or 'PCS' tests, the Kazazoglu test, and kinesiography (KGF). While some authors consider the PCS to be the side which first comes into contact with the food we prefer to define it as the side on which the majority of the cycles analysed and registered take place. The objective of this research was to analyse the relationship that might exist between the two different methods used for determining a lateral chewing preference. Although there was no statistically significant agreement between the two techniques, both reflected the fact that there was a marked preference for the right hand side.