Modified classification and regression tree splitting criteria for data with interactions

This paper proposes modified splitting criteria for classification and regression trees by modifying the definition of the deviance. The modified deviance is based on local averaging instead of global averaging and is more successful at modelling data with interactions. The paper shows that the modified criteria result in much simpler trees for pure interaction data (no main effects) and can produce trees with fewer errors and lower residual mean deviances than those produced by Clark & Pregibon's (1992) method when applied to real datasets with strong interaction effects.     

Site-specific focus groups: analysing learning spaces in situ

This article reflects on the focus group as a research technique used in an analysis of the relationship between learning spaces and pedagogy, developed as part of the assessment of the secondary school modernisation programme in Portugal. The research proposes a methodological innovation in the use of focus group, by developing focus groups before, during and after tours to the schools. The focus groups in this format were particularly important for the research since they facilitated a dynamic of social interaction and the expression of views and opinions among groups of pupils and teachers about the impact of the renovations on education practices. They also highlighted some of the specific aspects of the interaction between the appropriation processes and the object of the intervention, which was in itself object of contradictory interpretations. Further, this technique enables the attainment of a triangulation strategy, central to the study.     

The ‘Parkour Organisation’: inhabitation of corporate spaces

This paper discusses the corporate city and the way it structures the experience of its inhabitants. The corporate city is seen here as the embodiment of power relationships of a distinctly postmodern nature, a means to preserve and promote hegemonic and homogenising discourses like globalisation and consumerism. Corporate design and architecture embody specific kinds of relationships, experiences and perceptions of space and place. We will suggest that the corporate city is homogenised, lacking richness of civic space, not just in terms of form but in terms of structures (both, spatial structures and the kind of social structures/interactions they invite). The activities of a group of traceurs practising parkour are described and their philosophy is explained as a metaphor for active participation and dialectic relationship between the actual and the possible structures of the world. Richness of experience, strengthening of community, variety of activity, openness and possibility are irrelevant (actually, inimical) to the corporate forces that shape our cities today. However, as the experience of parkour demonstrates, extreme artforms of ‘urban activism’ but also, more importantly, human agency and the performativity of the everyday, are capable of transforming the otherwise alienating non‐places, to grounds of possibility, creativity and civic identity.     

A 1,408 km bicycle tour with prostate cancer patients—results of a pilot study

Negative psychological and physical effects of prostate cancer and its medical treatment may persist many years after diagnosis. The influence of a long cycling tour on rehabilitative or health-related effects with prostate cancer patients has not yet been studied. In practice, physicians and therapists rarely recommend cycling to prostate cancer. In May 2010, eight prostate cancer patients rode their bikes for over 1,408 km from Cologne to Marseille within 5 weeks. Endurance test, blood examinations (prostate-specific antigen (PSA), total testosterone, interleukin-6, oxidative stress, and antioxidant capacity) and quality of life questionnaires were completed before and after the tour. All eight subjects reached Marseille. Significant improvements could be observed in physical performance and certain quality of life scores (p?=?0.008), as well as a reduction of total testosterone (p?=?0.19). PSA levels did not change. This pilot study suggests that long bicycle tours with prostate cancer patients are feasible. Due to the missing control group and the small sample size, the results of this pilot study are limited.     

Reflexive habits: dating and rationalized conduct in New York and Berlin

This paper builds on the work of Norbert Elias to examine how conduct varies across cultural contexts. We compare courtship practices in New York and Berlin and ask how people act during the course of ‘getting together’ with a sexual or romantic partner. Drawing on interviews in both contexts, we find that conduct associated with the practice of ‘dating’ among New York respondents is more rationalized as indicated by a greater awareness of timing, a greater degree of intentionality and planning and a greater tendency to psychologize self and others. Berlin respondents report observations of themselves and others in less detail and tend to describe themselves as passive objects of the impersonal forces of love. Whereas conduct associated with dating is more reflexive in some ways, these forms of reflexive conduct are not themselves fully conscious or the object of reflection but have in turn become taken for granted and habitual. These findings challenge us to conceptualize habitus in a manner that does not reproduce the opposition between habit and reflexivity but allows us to use the concept as a tool to capture variations in how self‐monitoring and habit are combined in modes of conduct.     

Dating and Mate Selection Among Young Adults from Immigrant Families

In this article the authors examine dating and mate selection preferences and experiences from the perspective of young men and women from immigrant families. Through in-depth personal interviews with 35 second generation youth from diverse cultures, the authors explored: (1) parental influences and expectations of their children's mate choices; (2) the roles of gender, birth order, and length of residency in the United States in expectations for mate selection; and (3) immigrant youth's preferences for marriage partners. The findings showed that immigrant parents hold mostly endogamous views. Youth's dating experiences are influenced by their gender, their birth order, and their family's acculturation. Second generation immigrants generally seek bicultural partners like themselves. Narratives from the participants provide insight into the attitudes that guide mate selection of these young adults from immigrant families.