The Initiation of Dating in Adolescence: The Effect of Parental Divorce. The TRAILS Study

This study examined the effect of parental divorce on the time it took adolescents to initiate their first romantic relationships. Individual differences in temperament and pubertal development and the age of the adolescent at the time of divorce were also taken into account. Hypotheses were tested using event history analysis with a sample of 1,487 Dutch adolescents. Results indicated that divorce sped up the transition to first relationship only when experienced in early adolescence. Findings are discussed in light of research on the heightened sensitivity to stress during transition periods such as the entry into adolescence.     

Exercise can improve speed of behavior in older drivers

The main aim of this research was to study the effects of a specific exercise program on the speed of behavior of older adults during on-the-road driving. Twenty-six drivers (55-78 yr old) were randomly assigned to either an exercise group or a control group. The exercise program (3 sessions of 60 min/wk for 8 wk) incorporated tasks that induced the participants to respond quickly to challenging situations. On-the-road driving tasks (under single- and dual-task conditions) included measures of simple and choice reaction time, movement time, and response time. Significant positive effects were found at follow-up resulting from participation in the exercise program: Improvements were found for several measures in all driving tasks, and a composite score reflected a better general drivers' speed of behavior. These results show that exercise can enhance speed of behavior in older drivers and should therefore be promoted.     

Using hybrid models to support the development of organizational evaluation capacity: a case narrative

The ongoing need for public sector organizations to enhance their internal evaluation capacity is increasingly resulting in the use of hybrid evaluation project models, where internal evaluators work with external contracted evaluators to complete evaluative work. This paper first seeks to identify what is currently known about internal evaluation through a synthesis of the literature in this area. It then presents a case narrative illustrating how internal and external evaluation approaches may be used together to strengthen an evaluation project and to develop the evaluation capacity of the organization. Lessons learned include the need to integrate internal and external resources throughout the evaluation and to clarify expectations at the outset of the project.     

Elder abuse and neglect in African American families: informing practice based on ecological and cultural frameworks

Despite the rapid growth of the elderly African American population in the U.S., elder abuse and neglect in African American families continue to be underdeveloped areas of study. This article presents an ecological and culturally informed framework for the study of elder abuse in African American populations. The model was developed based on Bronfenbrenner's Human Ecological Theory. The model identifies risk factors associated with different systems that have an influence on the lives of African American families. Cultural protective factors also are identified in the model. The model is intended to provide an understanding of elder abuse and neglect in African American families by considering the influence of contextual factors such as the legacy of slavery, social exclusion, and structural segregation and racism. Specific suggestions for practice are proposed according to cultural strengths of African American communities as well as the ecological premises of the model.     

Social antecedents of the role stress and career-enhancing strategies of newcomers to organizations: A longitudinal study

Newcomers experience uncertainty and stress following entry into an organization. Two features of socialization are important for reducing their stress: socialization tactics and relations with superiors and co-workers. The present study tests a structural equation model, including, first, the effects over time of initial institutional socialization tactics and, second, the association between social relations at the workplace on newcomers’ role stress and career-enhancing strategies, two years later, among a large (N=661) international sample of job and organization stayers. Using LISREL 8.3 the results indicate a good fit between the model and data on several fit indices. Institutional socialization tactics had a significant association with newcomers’ relations with both their superiors and co-workers, and a significant negative association with their role conflict. Newcomers’ relations with superiors had a negative relationship with their role ambiguity, and a positive relationship with two kinds of career-enhancing strategies that they use to aid in their adaptation to their work situation. The relations of newcomers with co-workers were positively related to role conflict and negatively related to role ambiguity. Co-worker relations were also positively related to immediate career-enhancing strategies. Role conflict was positively related to immediate and negatively related to intermediate career-enhancing strategies, while role ambiguity was negatively related to intermediate career-enhancing strategies. The results are discussed in relation to their theoretical and practical importance.     

Beyond demand–control: Emotional labour and symptoms of burnout in teachers

Abstract

Teaching is a profession that involves a high level of emotional labour. This includes such behaviours as surface acting (displaying an emotion that is not actually felt), deep acting (the activity undertaken to actually feel a required emotion), and suppression of emotion. In many professions, this emotional labour is thought to be related to high levels of burnout. The aim of our study was to show that emotional labour has a unique relationship with burnout that is separate from its relationship with the variables of the Demand Control Support (DCS) model. Emotional labour was studied, together with the variables of the Karasek Job Demand Control Support model, in a random sample of 365 mathematics teachers in the Netherlands. We used the Dutch Questionnaire on Emotional Labor (D-QEL) that measures: (1) surface acting, (2) deep acting, (3) suppression, and (4) emotional consonance. In line with other studies, job characteristics were found to be specifically related to emotional exhaustion. Surface acting was significantly related to depersonalization, and emotional consonance (the absence of emotional labour) was related to personal accomplishment. We conclude that whereas the DCS model has been valuable for understanding emotional exhaustion, emotional labour provides an additional perspective for understanding work stress.     

It's Only Temporary: Time Frame and the Dynamics of Creative Project Teams

The success of many knowledge‐intensive industries depends on creative projects that lie at the heart of their logic of production. The temporality of such projects, however, is an issue that is insufficiently understood. To address this, we study the perceived time frame of teams that work on creative projects and its effects on project dynamics. An experiment with 267 managers assigned to creative project teams with varying time frames demonstrates that, compared to creative project teams with a relatively longer time frame, project teams with a shorter time frame focus more on the immediate present, are less immersed in their task and utilize a more heuristic mode of information processing. Furthermore, we find that time frame moderates the negative effect of team conflict on team cohesion. These results are consistent with our theory that the temporary nature of creative projects shapes different time frames among project participants, and that it is this time frame that is an important predictor of task and team processes.     

L(p,q)-labeling of sparse graphs

Let p and q be positive integers. An L(p,q)-labeling of a graph G with a span s is a labeling of its vertices by integers between 0 and s such that adjacent vertices of G are labeled using colors at least p apart, and vertices having a common neighbor are labeled using colors at least q apart. We denote by λ _p,q (G) the least integer k such that G has an L(p,q)-labeling with span k. The maximum average degree of a graph G, denoted by $\operatorname {Mad}(G)$ , is the maximum among the average degrees of its subgraphs (i.e. $\operatorname {Mad}(G) = \max\{\frac{2|E(H)|}{|V(H)|} ; H \subseteq G \}$ ). We consider graphs G with $\operatorname {Mad}(G) < \frac{10}{3}$ , 3 and $\frac{14}{5}$ . These sets of graphs contain planar graphs with girth 5, 6 and 7 respectively. We prove in this paper that every graph G with maximum average degree m and maximum degree Δ has:

λ _p,q (G)≤(2q?1)Δ+6p+10q?8 if $m < \frac{10}{3}$ and p≥2q.

λ _p,q (G)≤(2q?1)Δ+4p+14q?9 if $m < \frac{10}{3}$ and 2q>p.

λ _p,q (G)≤(2q?1)Δ+4p+6q?5 if m<3.

λ _p,q (G)≤(2q?1)Δ+4p+4q?4 if $m < \frac{14}{5}$ .

We give also some refined bounds for specific values of p, q, or Δ. By the way we improve results of Lih and Wang (SIAM J. Discrete Math. 17(2):264–275, 2003).     

Political Institutions,Elites, and Territorial Identity Formation in Belgium

Territorial identities in Belgium require a political rather than a cultural or structural explanation. The forces behind the development of identities in Flanders, Wallonia, Brussels and the German-speaking area are similar to the ones that produced the Belgian identity they are challenging. Political institutions and elites are at the heart of the process of territorial identity formation in Belgium. The emergence of Walloon and Flemish identities in the nineteenth and early twentieth centuries was the by-product of a struggle between the dominant French-speaking bourgeoisie and the traditional Flemish lower bourgeoisie within the institutional context of the early Belgian state. Transformations in the party system and reforms to political-territorial institutions in the last 40 years have strengthened these identities and created entirely new ones.