Environmental Factors, Locus of Control, and Adolescent Suicide Risk

This exploratory study seeks to better understand possible relationships between environmental factors, locus of control, and suicide risk among adolescents. The data derive from in-school surveys of eight-grade students conducted in 1998 and 1999 in Arizona, California, Nevada, and Wyoming. Results revealed higher levels of suicide risk were associated with a more external locus of control orientation. Relationships between suicide risk and several environmental factors and preferences also were found. Potential links between locus of control, environment, and suicide risk are discussed, as are implications for intervention efforts and future research. William P. Evans and Shawn C. Marsh are affiliated with the University of Nevada, Reno. Pasty Owens is affiliated with the University of California, Davis.     

A conceptual framework for the study of human ecosystems in urban areas

The need for integrated concepts, capable of satisfying natural and social scientists and supporting integrated research, motivates a conceptual framework for understanding the role of humans in ecosystems. The question is how to add humans to the ecological models used to understand urban ecosystems. The ecosystem concept can serve as the basis, but specific social attributes of humans and their institutions must be added. Learning and feedback between the human and natural components of urban ecosystems are key attributes of the integrated model. Parallels with familiar ecological approaches can help in understanding the ecology of urban ecosystems. These include the role of spatial heterogeneity and organizational hierarchies in both the social and natural components of urban ecosystems. Although urban watersheds are commonly highly altered, the watershed approach can serve as a spatial basis for organizing comparative studies of ecosystems exhibiting differing degrees of urbanization. The watershed concept can also spatially organize the hierarchically scaled linkages by which the integrated human ecosystem model can be applied. The study of urban ecosystems is a relatively new field, and the questions suggested by the integrated framework can be used to frame ecosystem research in and associated with urban and metropolitan areas.     

Longitudinal Changes in Marital Relationships: The Role of Offspring’s Pubertal Development

This study charted the longitudinal trajectories of wives’ and husbands’ reports of marital love, satisfaction, and conflict and explored whether and how first‐ and second‐born offspring’s pubertal development was related to marital changes. Data were drawn from the first 7 years of a longitudinal study of family relationships. Participants included wives, husbands, and first‐ and second‐born children from 188 White, working‐ and middle‐class families. Multilevel models revealed declines over time in wives’ and husbands’ reports of marital love and satisfaction but only small changes in conflict. Offspring’s pubertal development was related to changes in marital qualities; declines in positivity and increases in negativity were most consistently linked to firstborns’ puberty. Overall, the results highlight the interrelatedness of family subsystems.     

Emerging themes in distance learning research and practice: some food for thought

With the rapid spread of distance learning as a medium for delivering instruction, the practice of distance learning has outpaced research. This paper describes major themes identified in a review of selected research papers published in the past five years. Themes include the following: definitions of distance learning and why it should be studied; identification of the major learning theories on which research is based; how collaboration can be achieved via distance learning; the role that learner characteristics play in the success of distance learning systems, and issues related to measuring the effectiveness of distance learning. The authors conclude that more research is needed to identify critical success factors for distance learning.     

Competing Processes of Sibling Influence: Observational Learning and Sibling Deidentification

Although commonly cited as explanations for patterns of sibling similarity and difference, observational learning and sibling deidentification processes have rarely been examined directly. Using a person‐oriented approach, we identified patterns in adolescents' perceptions of sibling influences and connected these patterns to sibling similarities and differences and sibling relationship qualities. Participants included two adolescent‐age siblings (firstborn age M = 16.39, second‐born age M = 13.78) from 171 maritally intact families. Two‐stage cluster analyses revealed three sibling influence profiles: modeling, deidentification, and non‐reference. Analyses revealed differences in the correlations between firstborn and second‐born siblings' personal qualities across the three groups and differences in the sibling relationship qualities of younger siblings who reported modeling vs. those who reported deidentifying from their older siblings. Discussion focuses on refining the study of sibling influence processes.     

The Family Contexts of Gender Development in Childhood and Adolescence

We review research on the family's role in gender development during childhood and adolescence. Our discussion highlights children's dyadic family relationship experiences with their parents and siblings; additionally, we describe ways in which the larger system of family relationships, including gendered dynamics in the marriage and the differential family experiences of sisters versus brothers may have implications for gender development. We also emphasize the significance of contextual factors—ranging from situational demands and affordances to forces emanating from the larger social ecology—in family gender socialization. We conclude that family experiences may have a more important impact on gender development than has previously been believed, and we highlight directions for future study. These include: (1) applying more complex models of parent socialization and family dynamics to the study of the family's role in gender development; (2) expanding on research directed at the socialization of sex differences to study how family dynamics are linked to individual differences in girls’ and boys’ gendered qualities and behaviors; and (3) further exploring how contextual factors exert an impact on gender socialization in the family.     

论国家奥运战略

2008奥运的战略、方针、政策、步骤、规划等,是一个涉及面极为广泛深刻的系统工程,奥运战略实施应该有政治、外交、社会文化等全方位的目标,空间上应为全国范围而非仅锁定于北京及其周边地区。本文通过对北京奥运战略及奥运经济战略的分析研究,建立国家奥运战略研究的机制,提出一系列可行措施,以保证2008奥运各种收益最大化。同时,通过创办奥运,促进中国在政治、外交、经济、文化各方面取得巨大进步,从而顺利实现中国及北京政府向全世界宣告的将2008奥运办成“历史上最出色奥运会”的庄严承诺。     

Reliability in rehabilitation measurement

The article examines reliability as a key component of the psychometric properties of tests and inventories. What is reliability, types of reliability, why is reliability important, and other reliability issues are addressed in a manner that will help Work readers to better understand and apply psychometric considerations in the context of rehabilitation research. The authors contend that reliability is an essential condition for the psychometric soundness of measurement instruments that are used in rehabilitation research and practice.     

The basics of nonparametric statistics

This article introduces readers to the data analytic sub-paradigm of nonparametric statistics. The authors begin with an explanation of how and under what circumstances nonparametric statistics are used, then describe specific nonparametric techniques which are commonly used in social science research. Examples from the contemporary rehabilitation literature are provided throughout the article.