Box–Cox symmetric distributions and applications to nutritional data

AStA Advances in Statistical Analysis - We introduce and study the Box–Cox symmetric class of distributions, which is useful for modeling positively skewed, possibly heavy-tailed, data. The...     

Identifying Environmental and Social Factors Predisposing to Pathological Gambling Combining Standard Logistic Regression and Logic Learning Machine

Identifying potential risk factors for problem gambling (PG) is of primary importance for planning preventive and therapeutic interventions. We illustrate a new approach based on the combination of standard logistic regression and an innovative method of supervised data mining (Logic Learning Machine or LLM). Data were taken from a pilot cross-sectional study to identify subjects with PG behaviour, assessed by two internationally validated scales (SOGS and Lie/Bet). Information was obtained from 251 gamblers recruited in six betting establishments. Data on socio-demographic characteristics, lifestyle and cognitive-related factors, and type, place and frequency of preferred gambling were obtained by a self-administered questionnaire. The following variables associated with PG were identified: instant gratification games, alcohol abuse, cognitive distortion, illegal behaviours and having started gambling with a relative or a friend. Furthermore, the combination of LLM and LR indicated the presence of two different types of PG, namely: (a) daily gamblers, more prone to illegal behaviour, with poor money management skills and who started gambling at an early age, and (b) non-daily gamblers, characterised by superstitious beliefs and a higher preference for immediate reward games. Finally, instant gratification games were strongly associated with the number of games usually played. Studies on gamblers habitually frequently betting shops are rare. The finding of different types of PG by habitual gamblers deserves further analysis in larger studies. Advanced data mining algorithms, like LLM, are powerful tools and potentially useful in identifying risk factors for PG.     

Response improvement in complex experiments by co-information composite likelihood optimization

We propose an adaptive procedure for improving the response outcomes of complex combinatorial experiments. New experiment batches are chosen by minimizing the co-information composite likelihood (COIL) objective function, which is derived by coupling importance sampling and composite likelihood principles. We show convergence of the best experiment within each batch to the globally optimal experiment in finite time, and carry out simulations to assess the convergence behavior as the design space size increases. The procedure is tested as a new enzyme engineering protocol in an experiment with a design space size of order 10⁷.     

Results of Gottman Method Couples Therapy with Gay and Lesbian Couples

The results of an uncontrolled study of Gottman Method Couples Therapy in changing relationship satisfaction with 106 gay and lesbian couples is reported in this paper. Measurement of relationship satisfaction was conducted at five separate time points. The data show significant improvements in relationship satisfaction following eleven sessions of therapy for both gay male and lesbian couples. Effect sizes suggest that this therapy was highly effective, compared to the usual 0.5 standard deviation effect size in couples therapy. Initial co‐morbidities did not affect the size of the changes; in fact, some changes were significantly larger for three initial co‐morbidities.     

The role of organizational facilitators in promoting job-related mental health and group service effectiveness: a two-wave analysis

This study aimed to add to knowledge by providing a more systematic integration of work characteristics, workers’ health and performance. The two-wave multi-source study was conducted to test the relationship over time between the healthy states of groups of service-oriented workers and their service effectiveness when their organizations provide facilitators such as training, technical support and autonomy. The study takes healthy states to be a composite of affective-motivational and competent collective states (collective vigour and service competence) and service effectiveness. Service effectiveness was a combination of service quality as assessed by customers and their loyalty intentions. Data from 53 hotels and restaurants in Spain were aggregated from 256 boundary workers (i.e. workers in direct contact with customers) and 530 customers at Time 1 and from 470 customers at Time 2 six month later. Structural equation modelling showed that organizational facilitators at Time 1 were related to the service effectiveness reported by customers at Time 2, and also that there was a relationship between service effectiveness at Time 1 and the healthy states reported by the groups at Time 2. That is, contrary to what is widely believed, there was an influence of performance on well-being.     

The Use of Internet Chat Rooms to Meet Sexual Partners: A Comparison of Non-Heterosexually Identified Men with Heterosexually Identified Men and Women

ABSTRACT. Objectives: Prior work suggests that many individuals use the Internet to meet romantic or sexual partners. Our intent was to explore perceptions and experiences with meeting people online. Methods: In 2008, the authors conducted U.S.-based online interviews with 65 predominantly White, self-identified heterosexual men and women and gay/bisexual men (Mean age = 30.8 years). Results: Reasons for meeting people online, desired partner characteristics, and the process of connecting for sex paralleled those observed in face-to-face contexts. People used Internet chat rooms to identify more partners and specific partner characteristics. “Background checks” of online partners, though often believed to be inaccurate, increased familiarity and trust leading to reduced condom use. Participants said online condom use negotiation was easier but usually occurred in face-to-face contexts. Conclusions: The fundamental processes of meeting partners online are similar in many ways to meeting partners face-to-face; however, the Internet facilitates rapid access to relatively large numbers of potential partners.     

Gender inequalities: the integrated approach to the gender dimension in Europe

Despite the increase in, and focus on, gender equality in European debate – along with a substantial amount of policy initiatives and legal regulations – gender equality in the workplace and in careers is still some way off. In order to see the magnitude of the gap between women and men in European countries we have considered some significant domains such as the economy (employment structure and occupational segregation), education (educational attainment) and politics (political empowerment). The article aims to present data demonstrating that the employment structure in the EU, even in those countries where women have achieved high employment rates, still suffers from segregation, both ‘horizontally’ and ‘vertically’; and to single out some ‘weak signals’ but with a strong potential for social change and some indicators for social alternatives for the future.     

Oxford house: a review of research and implications for substance abuse recovery and community research

After treatment for substance abuse, whether it is in hospital-based treatment programs, therapeutic communities, or recovery homes, many patients return to former high-risk environments or stressful family situations. Returning to these settings without a network of people to support abstinence increases chances of a relapse. As a consequence, substance abuse recidivism following treatment is high for both men and women. Alternative approaches need to be explored, and there are some promising types of recovery homes. From a public health perspective, a series of studies conducted at DePaul University suggests that one type of recovery home for alcohol abuse recovery has much potential. For example, within this self-help communal living setting, recovering alcoholics were able to maintain employment, thereby reducing their need for government subsidies. Maintaining employment for recovering alcoholics may promote increased personal responsibility, which may impact self-efficacy beliefs. These pilot studies, then, raised both theoretical and practical issues needing further evaluation.