Mid-P confidence intervals based on the likelihood ratio for proportions estimated by group testing

Group testing has been used in many fields of study to estimate proportions. When groups are of different size, the derivation of exact confidence intervals is complicated by the lack of a unique ordering of the event space. An exact interval estimation method is described here, in which outcomes are ordered according to a likelihood ratio statistic. The method is compared with another exact method, in which outcomes are ordered by their associated MLE. Plots of the P‐value against the proportion are useful in examining the properties of the methods. Coverage provided by the intervals is assessed using several realistic grouptesting procedures. The method based on the likelihood ratio, with a mid‐P correction, is shown to give very good coverage in terms of closeness to the nominal level, and is recommended for this type of problem.     

Calculating the costs of local authority care for children with contrasting needs

Activity data from practitioners can be combined with financial data to develop unit costs for the eight processes that underpin social work activity for children looked after away from home. The frequency and duration of processes can then be calculated, and the data are used to cost different pathways through care. Costs vary according to children's needs, types of placements and local policies and practices. Combinations of need add to costs. This paper compares the costs accrued by children who show no evidence of additional support needs with a group of troubled children with emotional or behavioural difficulties who also commit offences. The latter show the most costly care pathways and also appear to experience the least positive outcomes, leading us to question whether different configurations of services might better meet their needs.     

如何对培训投资进行效益评估

以往的评估方法误导企业通过经营业绩来衡量培训投资的回报和培训的价值,实际上却难以在培训与经营成果之间建立起直接的联系,严重影响企业培训投资的信心、热情和员工培训的健康发展。文章认为培训对企业的贡献并不是直接用经营业绩或经营成果的指标来衡量,而是必须通过受培训直接影响(从而影响经营业绩)的员工的心理状态、行为表现和行为结果在培训后所发生的变化来衡量。文章还分析了四类不同培训的效果评估的内容和方法。     

对外汉语学习词典的“学习性”探索

“学习性”是评价对外汉语学习词典的一条重要准则,在对外汉语学习词典的编写和研究中有着重要意义。基于学习理论对“学习”的定义并结合学习词典的性质,可以将学习词典的“学习性”定义为学习词典中所体现出的能够帮助学习者获得更好的学习效果的一系列特征。对外汉语学习词典的“学习性”主要体现在以下五个方面：智慧技能、言语信息、认知策略、动作技能和态度。     

Does the Amount of Time Mothers Spend With Children or Adolescents Matter?

Although intensive mothering ideology underscores the irreplaceable nature of mothers' time for children's optimal development, empirical testing of this assumption is scant. Using time diary and survey data from the Panel Study of Income Dynamics Child Development Supplement, the authors examined how the amount of time mothers spent with children ages 3–11 (N = 1,605) and adolescents 12–18 (N = 778) related to offspring behavioral, emotional, and academic outcomes and adolescent risky behavior. Both time mothers spent engaged with and accessible to offspring were assessed. In childhood and adolescence, the amount of maternal time did not matter for offspring behaviors, emotions, or academics, whereas social status factors were important. For adolescents, more engaged maternal time was related to fewer delinquent behaviors, and engaged time with parents together was related to better outcomes. Overall, the amount of mothers' time mattered in nuanced ways, and, unexpectedly, only in adolescence.     

Citizen-making: The role of national goals for socializing children

The ecological, political, religious and economic constraints and opportunities characterizing a nation crystallize to set the agenda for socializing children, its future citizens. Parented accordingly, members of those nations would come to adopt the values, beliefs, skills and attitudes that constitute the requisite human capital to sustain that nation. This study reports on the profiling of 55 nations by two dimensions of the socialization goals for children extracted from the World Values Survey, viz., Self-directedness versus Other-directedness, and Civility versus Practicality. An affluent, less corrupt and more gender-equal society is associated with greater focus on Self-directedness and Civility. Both dimensions show convergent and discriminant validities in their correlation with nation-level psychosocial variables such as citizen subjective well-being, values, beliefs, pace of life and trust of out-groups. These dimensions are also shown to connect a nation’s ecological construct to the outcomes of its citizens, adding a psychological–developmental perspective to examine nation-building and cultural transmission.     

Bayesian latent variable models for clustered mixed outcomes

A general framework is proposed for modelling clustered mixed outcomes. A mixture of generalized linear models is used to describe the joint distribution of a set of underlying variables, and an arbitrary function relates the underlying variables to be observed outcomes. The model accommodates multilevel data structures, general covariate effects and distinct link functions and error distributions for each underlying variable. Within the framework proposed, novel models are developed for clustered multiple binary, unordered categorical and joint discrete and continuous outcomes. A Markov chain Monte Carlo sampling algorithm is described for estimating the posterior distributions of the parameters and latent variables. Because of the flexibility of the modelling framework and estimation procedure, extensions to ordered categorical outcomes and more complex data structures are straightforward. The methods are illustrated by using data from a reproductive toxicity study.     

Heterogeneity in Two‐Parent Families and Adolescent Well‐Being

This study highlights the heterogeneity in two‐parent families and examines how adolescents fare when they reside in simple two‐parent, blended, and stepfamilies. Using the National Longitudinal Study of Adolescent Health (N= 1,769), we find that shared biological children in blended families have worse outcomes than children in simple two‐parent families, even though they reside with both of their biological parents. These differences occur for academic performance, delinquency, school detachment, and depression. Current explanations in the family literature do not account for the poorer outcomes of shared children in blended families. We suggest that the presence of half‐siblings creates a unique family situation that is not accurately represented in the current family literature.     

Mothering and Peer Associations Mediate Cumulative Risk Effects for Latino Youth

The present study examined whether positive parenting and deviant peer associations mediated the relations between a cumulative risk composite comprising financial strain, neighborhood problems, and maternal psychological distress and subsequent youth adjustment problems. Drawn from the Welfare, Children, and Families: A Three City Study, the sample consisted of 449 economically disadvantaged Latino families. Structural equation modeling showed that after controlling for baseline levels of youth adjustment problems, cumulative risk, assessed when adolescents were 10 to 14 years old, was directly and indirectly predictive of youths’ deviant peer associations 16 months later, through mother’s positive parenting. Deviant peer associations, in turn, were proximally associated with youth externalizing and internalizing problems. Findings underscore the role of mothers and peers in Latino youth adjustment problems.     

Predicting after-care outcomes: the importance of 'felt' security

Young people who ‘age out of care’ generally do not have the continuing source of emotional, social and financial support that is available to most young people in their transition to early adulthood. They therefore face the challenges of making various transitions with fewer resources and less support, and at an earlier age and in a less graduated way than young people of the same age in the general population. Some, however, manage this process more successfully than others. The current study examines the links between stability, perceived or ‘felt’ security and later outcomes for young people 4–5 years after leaving care. It is based on a four‐wave longitudinal study over 5 years of 47 young people leaving care in New South Wales, Australia. Felt security in care, and continuity and social support beyond care were the main significant predictors of these young people’s outcomes 4–5 years after leaving care. While stability in care was important, this may be as a means to an end–building a sense of security, belonging and a network of social support.