The effects of a continuous passive motion device on myoelectric activity of the erector spinae during prolonged sitting at a computer workstation

Continuous passive motion (CPM) has been proposed as a method to help individuals with low back pain cope with prolonged sitting. The purpose of this study was to investigate the effects that a commercially available CPM device had on lumbar and thoracic erector spinae (ES) muscle activation (using surface electromyography, "EMG"), and on subjective discomfort during prolonged seated computer work with and without the use of the CPM device. There were no significant differences in average ES muscle activation levels, amplitude probability distribution functions, and EMG gaps number and length when sitting with the CPM device was compared to sitting normally. Subjective ratings of discomfort were also not significantly different between the two sitting conditions. The results indicated that there were no clear mechanisms by which the CPM device may reduce ES muscle pain and fatigue for the tasks and pain-free individuals studied.     

FATHERS’ USE OF LEAVE IN AUSTRALIA

This paper examines Australian fathers’ use of leave at the time of the birth of a child, drawing on data from The Parental Leave in Australia Survey, conducted in 2005, and a subsequent organizational case study. Our analysis shows that although most Australian fathers take some leave for parental purposes, use of formally designated paternity or parental leave is limited. This is unsurprising given the Australian policy framework, which lacks legislative provision for paid paternity or parental leave, and does not require any of the shared unpaid parental-leave entitlement to be reserved for fathers. Use of leave is shown to be influenced primarily by fathers’ employment characteristics, with those working in small organizations or non-permanent positions least likely to utilize paternity or other forms of leave. Overall, the analysis suggests that improvements in the policy framework would increase Australian fathers’ propensity to take parental leave, but highlights barriers to usage associated with labour market divisions and career pressures that will not be solved solely by the adoption of more progressive leave policies.     

Value added

Strategic Giving: The Art and Science of Philanthropy, by Peter Frumkin. Chicago: University of Chicago Press, 2006. 458 pp., $39.00 cloth.     

Children of sex rings

Children who have been sexually abused by a ring of adults present in a way that may confuse and mislead practitioners familiar only with single-offender sexual abuse. Understanding the similarities and differences between single- and multiple-offender sexual abuse is essential in determining the validity of a child's disclosure as well as in carrying out an appropriate treatment plan. Addressing the denial and resistance within the child welfare system in relation to child sexual exploitation by a ring is crucial to a practitioner's effectiveness. Finally, developing a therapeutic parent-child relationship is critical to the families who must live with their child's experience.     

Defining Nations in Asia and Europe: A Comparative Analysis of Ethnic Return Migration Policy1

We argue that regional comparison of East Asian and European ethnic return migration policy offers important new perspectives on nationhood, nondiscrimination norms, and trans‐nationality. We find that despite international nondiscrimination norms, preferential ethnic return policy is common in both regions. These policies at least implicitly define the nation as existing across borders. However, there are significant regional differences. East Asian states use co‐ethnic preferences instrumentally for economic goals and also offer preferential treatment of co‐ethnic foreign investors. European states offer preferences to coethnics to protect these populations or express symbolic ties, sometimes at great expense. Thus, in Europe the state has an obligation to assist coethnics abroad, but in Asia, foreign coethnics assist the state.     

Understanding preferences for tree attributes: the relative effects of socio-economic and local environmental factors

Urban plant biodiversity is influenced by both the physical environment and attitudes and preferences of urban residents for specific plant types. Urban residents are assumed to be disconnected from their immediate environment, and cultural and societal factors have been emphasized over environmental factors in studies of landscaping choices. However, we postulate that local climatic and environmental factors can also affect preferences for plant attributes. Therefore, spatial and temporal patterns in urban tree biodiversity may be driven not only by the direct effect of environmental variables on plant function, but also by the effect of environmental variables on attitudes toward trees and associated choices about which types of trees to plant. Here, we tested the relative effects of socio-economic and local environmental factors on preferences toward tree attributes in five counties in southern California in and surrounding Los Angeles, based on 1,029 household surveys. We found that local environmental factors have as strong an effect on preferences for tree attributes as socio-economic factors. Specifically, people located in hotter climates (average maximum temperature 25.1 °C) were more likely to value shade trees than those located in cooler regions (23.1 °C). Additionally, people located in desert areas were less likely to consider trees to be important in their city compared with people located in naturally forested areas. Overall, our research demonstrates the inherent connections between local environmental factors and perceptions of nature, even in large modern cities. Accounting for these factors can contribute to the growing interest in understanding patterns of urban biodiversity.     

Educational Attainment in New and Established Latino Metropolitan Destinations*

Objective. This study examines the educational attainment of Latinos who immigrated to the United States by age 12. We compare the educational attainment of Latino immigrants in established and emerging Latino immigrant gateway cities in order to identify whether there are any significant differences in educational attainment between immigrants in these two gateways types and why such differences might exist. Methods. We employ OLS regression using the 2000 5% Integrated Public Use Microdata Sample. Results. Our results suggest that contrary to speculation, educational attainment among Latino immigrants is significantly higher in new Latino destinations than in established Latino metropolitan areas, although much of the difference is mediated by demographic factors. Migration history, English proficiency, ethnicity, and citizenship status account for a substantial portion of the differences in educational attainment between destination types. The migration history of these immigrants suggests a selection effect: only those immigrants who are relative newcomers to their new Latino destination have significantly higher educational attainment than those in established metropolitan areas. Conclusions. We find that educational attainment among Latino immigrants is higher in new Latino destinations. Our study suggests that more highly educated Latino immigrants are choosing new Latino destinations, while longer‐term immigrant residents of new destinations are faring no better (in terms of educational levels) than those in established destinations. English proficiency, ethnicity, and citizenship status are confirmed as factors strongly associated with educational attainment among immigrants.     

Social Status as a Predictor of Race and Gender Stereotypes in Late Childhood and Early Adolescence

We examined race and gender stereotypes in fourth‐, sixth‐ and eighth‐grade White and Black children. The participants reported their perceptions of the competence of Black, White, female and male children in academic domains, sports and music. In general, low‐status groups (girls and Black children) did not endorse stereotypes that reflected negatively on their own group but were likely to report stereotypes that favored their social group. High‐status groups (boys and Whites) endorsed most traditional stereotypes, whether negative or positive, for their social group. Where age differences appeared, older children were more likely than younger children to report traditional stereotypes and status effects were more pronounced. The results are discussed in terms of group enhancement and relationships between social stereotypes and self‐views.     

Outcomes assessment of role-play scenarios for teaching responsible conduct of research

We describe the summative assessment of role-play scenarios that we previously developed to teach central topics in the responsible conduct of research (RCR) to graduate students in science and engineering. Interviews with role-play participants, with participants in a case discussion training session, and with untrained students suggested that role-playing might promote a deeper appreciation of RCR by shifting the focus away from wanting to simply "know the rules." We also present the results of a think-aloud case analysis study and describe the development of a behaviorally-anchored rating scale (BARS) to assess participants' case analysis performance.