Discusion

Resumen

En esta investigación se estudia la validez de una versión castellana de la escala «Environmental Concern Scale» (ECS) llevada a cabo con 716 estudiantes. Las puntuaciones obtenidas por los sujetos proambientalistas y no proambientalistas resultan significativamente diferentes. Asímismo, se estudian las relaciones entre las actitudes hacia la preocupación por el medio ambiente, la energía nuclear y la ideología política, mostrándose una relación entre ellas de diferente intensidad. Mientras la energía nuclear está fuertemente vinculada a la ideología política, no sucede en tal medida entre ésta y las actitudes conservacionistas, ya que tanto los de derechas como los de izquierdas participan de la preocupación por el medio ambiente, aunque no en la misma medida.     

A comparison of methods for the fitting of generalized additive models

There are several procedures for fitting generalized additive models, i.e. regression models for an exponential family response where the influence of each single covariates is assumed to have unknown, potentially non-linear shape. Simulated data are used to compare a smoothing parameter optimization approach for selection of smoothness and of covariates, a stepwise approach, a mixed model approach, and a procedure based on boosting techniques. In particular it is investigated how the performance of procedures is linked to amount of information, type of response, total number of covariates, number of influential covariates, and extent of non-linearity. Measures for comparison are prediction performance, identification of influential covariates, and smoothness of fitted functions. One result is that the mixed model approach returns sparse fits with frequently over-smoothed functions, while the functions are less smooth for the boosting approach and variable selection is less strict. The other approaches are in between with respect to these measures. The boosting procedure is seen to perform very well when little information is available and/or when a large number of covariates is to be investigated. It is somewhat surprising that in scenarios with low information the fitting of a linear model, even with stepwise variable selection, has not much advantage over the fitting of an additive model when the true underlying structure is linear. In cases with more information the prediction performance of all procedures is very similar. So, in difficult data situations the boosting approach can be recommended, in others the procedures can be chosen conditional on the aim of the analysis.     

Wenn die Arbeitsfähigkeit gefährdet ist: Möglichkeiten institutioneller Konfliktbearbeitung

Mediation and conflict-moderation in organisational conflictsOrganisations are subject to permanent changes and must therefore master the task of permanently dealing with conflicts from a new. If the functioning of work of subsystems or the organisation as a whole is threatened, rapid interventions are demanded. The author introduces mediation as a intervention method. Two methods are compared in a practice test: mediation and conflict-moderation.     

Contributions of the German “Expression Psychology” to nonverbal communication research

An attempt is made to survey research on nonverbal behavior performed by German speaking Expression Psychologists. In this first part of a series of articles (other parts will cover research on facial expression, body movement, and speech and voice) theories and concepts of this nearly unknown branch of psychology are reviewed and discussed. Topics include the nature of expressive behavior, the relation between states/traits and expressive behavior, and the perception of expressive behavior.... we should now concentrate on searching for new avenues of approach, particularly in the study of human social communication, without worrying too much about rigid conformity with the canons of experimental respectability. We need more ideas, not more experiments; any provocative theory would be preferable to the inductive collecting of bits and pieces that has become our respectable habit. (Israel & Tajfel, 1972, p. 4)Editor's Note: The subsequent three parts of this series, to be published in consecutive issues of theJournal, further explore this area of theory and research often little known to American psychologists. Comments and contributions about the series are welcomed.     

Wilfried Kerntke (2004): Mediation als Organisationsentwicklung

Ohne Zusammenfassung