Influence in covariance structure analysis: with an application to confirmatory factor analysis

Influence functions are derived for the parameters in covariance structure analysis, where the parameters are estimated by minimizing a discrepancy function between the assumed covariance matrix and the sample covariance matrix. The case of confirmatory factor analysis is studied precisely with a numerical example. Comparing with a general procedure called one-step estimation, the proposed procedure has two advantages:1) computing cost is cheaper, 2) the property that arbitrary influence can be decomposed into a fi-nite number of components discussed by Tanaka and Castano-Tostado(1990) can be used for efficient computing and the characterization of a covariance structure model from the sensitivity perspective. A numerical comparison is made among the confirmatory factor analysis and some procedures of ex-ploratory factor analysis by using the decomposition mentioned above.     

Ageing Society Issues in Korea*

Korean society is facing unprecedentedly higher population ageing, particularly in the first half of the 21st century. The implications of population ageing have a much wider effect than the welfare of the elderly. From a broader and long‐term perspective, understanding population ageing may require a new paradigm. Korea has attempted to model its policies for ageing society on those of advanced welfare states, but as these no longer seem viable, Korean policy‐makers are searching for more effective and efficient measures to deal with its rapid ageing population. Reflecting a broader and long‐term perspective, the Korean government recently produced a comprehensive national policy plan to deal with the consequences of rapid population ageing. This article outlines the phenomenon of population ageing in Korea and the recent development of national policies for population ageing, describing the Korean comprehensive national policy plan for responding to it and examining major issues and problems related to developing and implementing the plan. This article finally suggests a new, age‐integrated social system approach to an ageing society.     

Inside the blogosphere: A taxonomy and framing analysis of abortion weblogs

This study analyses weblog abortion-related content sampled via a search and snowball method. When weblogs located inside of established media Web sites and other weblogs are compared, they are equivalent in the use of advocacy versus objectivist frames. Media weblog posts contain a political frame more frequently than non-media weblog posts do. In terms of diversity of frame, media weblogs employ more frames in their stories. Various explanations for these findings are offered in the context of current abortion-related content patterns.     

Social Activity,School-related Activity,and Anti–substance Use: Media Messages on Adolescent Tobacco and Alcohol Use

In this article, we present the effects of three hypothesized protective factors—social activities, school-related activities, and anti–substance use media messages—on adolescent tobacco and alcohol use. Data were drawn from the “Monitoring the Future” research project, which was conducted by the Institute for Social Research at the University of Michigan. The sample included 2,551 twelfth-grade students. The results of the structural equation model showed that exposure to media anti-drug messages had an indirect negative effect on tobacco and alcohol use through school-related activity and social activity. The results suggest that comprehensive ecological interventions encompassing media, family, and school can increase the preventive effects of adolescent's substance use.     

The longitudinal effects of influence of parental attachment and emotion regulation on Internet delinquency in early adolescence

ABSTRACT

The purpose of this study was to identify the longitudinal influence of parental attachment and emotion regulation on changes in Internet delinquency. This study used the Korean Youth Panel Survey (KYPS) data, in which 2,844 school-age children were annually assessed from Grade 4 in 2004 to Grade 8 in 2008 in South Korea. Latent growth models were used to examine developmental trajectories of Internet delinquency, parental attachment, and emotion regulation longitudinally. This study showed that adolescents experience an increase in Internet delinquency over the fourth year and a decline in the fifth year. The initial level of parental monitoring had significant effects on the initial level of emotion regulation. In addition, the initial level of parental attachment was associated with a slower rate of acceleration of Internet delinquency across time. The study findings indicate that parental attachment influences Internet delinquency among Korean adolescents. The practice implications of the findings are discussed in terms of Internet delinquency reduction efforts.     

Continuing professional development after qualification--partnerships,pitfalls and potential

Social work educators, employers and policy-makers have increasingly recognised the importance of continuing professional development. The UK social work qualification (DipSW) provides a broad base of practice skills, knowledge and values. However, increasingly complex work, frequent legislative and policy changes, research findings and challenges of working in a societal context of increasing change and diversity all contribute to the necessity of developing strategies for continuing professional development which adequately equip social workers. Such education cannot be alienated from social workers' employment context, and thus needs to remain mindful of employers' needs while concurrently maintaining academic rigour. This paper explores the development and delivery of a year-long post-qualifying training course run collaboratively between West Sussex Social and Caring Services and University College Chichester. It places some of the experiences of tutors, candidates and Training and Development Officers within the wider context of social work education, training and the delivery of social care. In exploring some of the contradictions and tensions experienced it seeks to further understand the challenge of delivering effective training in an increasingly complex and fragmented arena. Finally, it considers possible future developments, mindful of future changes in UK social work education.     

An efficient curve in stochastic capacity expansion

An optimum expansion of a single capacity is considered when the installation cost is very large and future demand is given by an evolving process of Wiener. Risk of expansion is evaluated and included in the decision criteria which links the capacity expansion problem with financial investment theory, Numerical results show the existence of an optimum expansion capacity and an efficient curve which represent the optimum choices with respect to the possible combinations of expansion cost and risk.     

Curtains at Number Ten: predicting the general election

The UK general election must be called by May 2010, with Conservatives widely expected to oust Labour. How certain are those expectations, and what problems face those trying to predict the results? Opinion pollster Nick Moon reveals all.     

The LGBQ Social Climate Matters: Policies,Protests, and Placards and Psychological Well-Being Among LGBQ Emerging Adults

Sexual minority youth, including emerging adults, are at risk for negative health outcomes. Minority stress theory posits that heterosexism can contribute to these outcomes among sexual minorities. Researchers have tested this theory with respect to interpersonal heterosexism; however, little attention has been given to macro-level and environmental forms of heterosexism, especially among lesbian, gay, bisexual, and queer (LGBQ) youth. In this study, we examine the role of objective social climate (LGB state-level policies) and experiential distal and proximal environmental microaggressions on the psychological well-being of LGBQ emerging adults. Furthermore, we examine the role of LGBQ identity salience as a moderating factor on the macro/environmental-heterosexism and well-being relationship. Multivariable linear regression results suggest that living in a state without same-sex marriage laws is associated with greater self-esteem, whereas both distal and proximal environmental microaggressions are risk factors for anxiety and perceived stress. Furthermore, identity salience can ameliorate the effects of distal microaggressions and intensify the effects of proximal microaggressions and same-sex marriage legislation. Implications for practice with sexual minority youth are discussed.