On the Diaconis-Gangolli Markov chain for sampling contingency tables with cell-bounded entries

The problems of uniformly sampling and approximately counting contingency tables have been widely studied, but efficient solutions are only known in special cases. One appealing approach is the Diaconis and Gangolli Markov chain which updates the entries of a random 2×2 submatrix. This chain is known to be rapidly mixing for cell-bounded tables only when the cell bounds are all 1 and the row and column sums are regular. We demonstrate that the chain can require exponential time to mix in the cell-bounded case, even if we restrict to instances for which the state space is connected. Moreover, we show the chain can be slowly mixing even if we restrict to natural classes of problem instances, including regular instances with cell bounds of either 0 or 1 everywhere, and dense instances where at least a linear number of cells in each row or column have non-zero cell-bounds.     

Successful adoption and implementation of a comprehensive casework practice model in a public child welfare agency: Application of the Getting to Outcomes (GTO) model

In recent years, several states have been developing or adopting casework practice models in an effort to shape the thinking and behavior of front line child welfare workers with a commitment to improving the safety, permanency and well-being outcomes of vulnerable children in their care (Antle, Christensen, Barbee & Martin, 2008; Christensen, Todahl & Barrett, 1999; Courtney, 2009; Folaron, 2009). This article presents one framework for approaching the organizational changes that need to be made in order to support a practice model. The Getting to Outcomes” Framework (Wandersman, 2009) is a useful approach for ensuring that all areas to support practice change are addressed.     

Job tenure as a moderator of stressor–strain relations: A comparison of experienced and new-start teachers

Abstract

Few studies have investigated the extent to which the effects of work stressors on strain change over the duration of employees’ job incumbencies. Drawing on Karasek's (1979) job demands-control-support model, the current study examined the moderating influence of job tenure (experienced versus novice worker status) on stressor-strain relations. Using a sample of 422 experienced and 248 beginning schoolteachers in Australia, job factors and job strain were assessed on two occasions, 8 months apart. Analyses revealed that the three job factors were each correlated with strain as predicted, although the (elusive) demands×control interaction effect was evidenced amongst “new-start” teachers only. The findings provide mixed support for Karasek's model, and draw attention to the need to consider the role of job tenure and career stage in studies of work stress, as work stressor-strain effects may be routinely underestimated in research that ignores these factors.     

Self-Solicited Feedback: Effects of Hourly Pay and Individual Monetary Incentive Pay

The frequency of feedback solicitation under hourly pay and individual monetary incentive pay conditions was examined. A between-subjects design was used with 30 college students in the two groups. Participants attended three experimental sessions and entered the cash value of simulated bank checks presented on a computer screen. Performance was higher for individuals who were paid incentives; however, participants who were paid incentives did not self-solicit feedback more than those who were paid hourly. Rather, participants in both groups solicited feedback quite frequently. Additionally, performance was not related to feedback solicitation. These results suggest that the incentives did not make feedback more reinforcing even though the incentives were functional rewards and the feedback was correlated with the amount of pay earned: the better the feedback, the more pay participants earned. The results also support the position that it may be necessary to pair objective feedback with an evaluative component to enhance performance.     

Enhancing the efficacy and empowerment of older adults through group formation

Research suggests that efficacy and empowerment are necessary for social engagement and that a sense of efficacy and empowerment exerts positive influences on older adults. However, little is known about how individual efficacy and empowerment are affected by group efficacy and empowerment in later life. To assess the impact of group involvement on the individual, the authors conducted a follow-up study with members of an art guild for older adults. Qualitative data were collected in 1997 and 2001 to ascertain the members' perceptions of group goals and accomplishments, membership benefits, the effect on the community, societal views about older adults, and the impact of group activities on the individual. The results clearly indicated that collective efficacy and empowerment through social engagement were beneficial to members as individuals and as a group, and contributed to well-being through a general sense of accomplishment and pride.     

Cultural Intelligence: A Review and New Research Avenues

Cultural intelligence (CQ), an individual's capability to function and manage effectively in culturally diverse situations and settings, has become the focus of a vibrant scholarly conversation and a flourishing area of multidisciplinary research. Since the introduction of the concept in 2002, substantial research has been conducted concerning its definition, the validation of its measurement, and the examination of its development and predictive capabilities. The present paper systematically reviews 73 conceptual and empirical articles published on CQ from 2002 to 2015 in management and international business journals as well as in education and psychology. The authors discuss two distinct conceptualizations of CQ, developments within the conceptual research, and opportunities for further theorizing. They also cluster the empirical studies based on how CQ was used and identify patterns, achievements and challenges within the literature. Finally, based on their analysis, they identify promising avenues for future research and propose specific questions that can further advance the scholarly conversation on CQ.