Improving cross-correlation tests through re-sampling techniques

In this paper, we show that type I and type II errors of the cross-correlation test between two autocorrelated time series can be reduced, in some cases, by means of tabulation of the empirical distribution of the sample cross-correlation coefficient, using alternative re-sampling techniques.     

Ethnic Identity Development Among Adolescents in Foster Care

Because past research indicates that stronger ethnic identity is related to better outcomes in areas such as academic achievement and mental health, it is important to provide youth in foster care with opportunities to develop their ethnic identity. Using data from in-person interviews with 188 youth aged 14–17 in foster care (88.7% response rate), this paper explores two areas related to ethnic identity: (1) youth perceptions about their own ethnic identity, and (2) attitudes about ethnic identity development specific to the experience of being in foster care. Results suggest that black youth and Hispanic/Latino youth have a stronger sense of ethnic identity than white youth. Most youth are interested in learning more about their ethnic background. Understanding how youth in foster care identify ethnically and understanding their beliefs related to ethnic identity may lead to the enhancement of services provided to youth across child welfare, education, and mental health systems.

The Need to Establish the Organisation for the Prohibition of Biological Weapons: A Proposal for the Future

Biological weapons are considered, by the international community, as a weapon of mass destruction. When the Biological Weapons Convention (BWC) was negotiated during the 1960s and early 1970s, the negotiators considered unnecessary the establishment of an international organisation to supervise the implementation of the Convention’s provisions by the State parties. It is important to highlight that since the entry into force of the BWC, the international situation has significantly changed. For this reason perhaps the moment has arrived to consider again the proposal of settling down such an organisation in the framework of the strengthening the BWC.     

Building Weighted-Domain Composite Indices of Life Satisfaction with Data Envelopment Analysis

The specialised literature has frequently addressed the relationship between life domains and people’s satisfaction with life. Some researchers have posed questions regarding the importance of domains, therefore interpreting them as weightings and creating domain satisfaction indices. This paper illustrates how Data Envelopment Analysis (DEA) and Multi-Criteria-Decision-Making (MCDM) techniques can be employed to compute domain-based composite indices of life satisfaction and weightings for life domains. Furthermore, an empirical application is performed on a sample of 178 people living in a rural community in Yucatan (Mexico). One of the main features of the aforementioned techniques is that weightings might differ from one individual to another. Accordingly, several weighting schemes are used to compute different life satisfaction indices, in addition to a constant equally-weighted index. Based on the goodness-of-fit criteria commonly used in this literature, our main result is that DEA-MCDM indicators of life satisfaction do not improve the relationship with self-reported life satisfaction in comparison to the equally-weighted index.     

Forensic Evaluation in Alleged Sibling Incest Against Children

Sibling incest is a serious form of intrafamilial sexual abuse with health, social, and legal relevance. A retrospective study was conducted through the analysis of forensic medical reports of the alleged sibling incest of victims under 18 years old (n = 68) from 2004 to 2011 as well as the respective judicial outcomes. Results demonstrated that sibling’s sexual abuse is associated with several circumstances that might exacerbate its severity such as vaginal, anal, and/or oral penetration. Moreover, the victim’s young age, the proximity between victim and abuser, and the fact that it is committed at the victim’s and/or abuser’s home and by using physical violence and verbal threats justify a late detection of these cases.     

The role of social relationships in the association between adolescents' depressive symptoms and academic achievement

While research has established that depression interferes with academic achievement, less is understood about the processes by which social relationships may buffer the relationship between depression and academic outcomes. In this study we examined the role of positive relationships in the school, family and peer contexts in the association between depressive symptoms and academic achievement among 894 adolescents aged 12–17 years living in Santiago, Chile. Depressive symptoms were associated with lower levels of academic achievement; parental monitoring, school belonging, positive mother relationships, and having academically inclined peers moderated this relationship, though some interactions differed by sex and age. Implications for promoting the academic success of adolescents experiencing depressive symptoms are discussed.     

Factors associated with family reunification for children in foster care

In this paper, we analyse reunification processes from family foster care, both kinship and non‐kinship, and the variables associated with them in a Spanish sample. Data collection was carried out after a review of child protection and foster care files, and those responsible for the cases were also consulted. The cases studied were closed, which made it possible to assess the final outcome of the fostering. We found that only one‐fifth of the children return to their birth family after the fostering, and that those in non‐kinship are less likely to do so. Seven factors were associated with family reunification processes: age of the child, kinship care with family co‐operation, drug dependence in parents, neglect due to alcoholism, foster care under voluntary arrangement with visits, short‐term fostering with family co‐operation and parental impossibility due to imprisonment. The contribution of these data takes on particular importance given that the Spanish child protection system keeps no official statistics on the development or outcome of its interventions and records even less information on the factors associated with such outcomes.     

Maximum-likelihood estimation of the random-clumped multinomial model as a prototype problem for large-scale statistical computing

Numerical methods are needed to obtain maximum-likelihood estimates (MLEs) in many problems. Computation time can be an issue for some likelihoods even with modern computing power. We consider one such problem where the assumed model is a random-clumped multinomial distribution. We compute MLEs for this model in parallel using the Toolkit for Advanced Optimization software library. The computations are performed on a distributed-memory cluster with low latency interconnect. We demonstrate that for larger problems, scaling the number of processes improves wall clock time significantly. An illustrative example shows how parallel MLE computation can be useful in a large data analysis. Our experience with a direct numerical approach indicates that more substantial gains may be obtained by making use of the specific structure of the random-clumped model.     

Exploring spirituality among youth in foster care: findings from the Casey Field Office Mental Health Study

This study examined spiritual coping mechanisms, beliefs about spirituality and participation in spiritual activities and in other positive activities among adolescents in foster care. A multidimensional measure of spirituality was developed for face-to-face interviews with 188 youth (ages 14–17) from diverse racial/ethnic backgrounds in the United States. Findings revealed 95% of youth believe in God, over 70% believe God is 'creator' and God is 'love', and 79% considered prayer a spiritual practice. Most youth said love and forgiveness help them heal. Two-thirds (67%) reported responding to 'bad or tragic things happening' by spending time alone, and over half responded by praying (59%) or sharing the problem with someone else (56%). Youth's top three spiritual goals were to follow God's plan for them, become a better person, and know their purpose in life. Based on the value youth ascribed to spiritual coping mechanisms, recommendations for policy and practice focus on the integration of spirituality into practice and caregiving for youth in foster care.