Total least squares solution for compositional data using linear models

The restrictive properties of compositional data, that is multivariate data with positive parts that carry only relative information in their components, call for special care to be taken while performing standard statistical methods, for example, regression analysis. Among the special methods suitable for handling this problem is the total least squares procedure (TLS, orthogonal regression, regression with errors in variables, calibration problem), performed after an appropriate log-ratio transformation. The difficulty or even impossibility of deeper statistical analysis (confidence regions, hypotheses testing) using the standard TLS techniques can be overcome by calibration solution based on linear regression. This approach can be combined with standard statistical inference, for example, confidence and prediction regions and bounds, hypotheses testing, etc., suitable for interpretation of results. Here, we deal with the simplest TLS problem where we assume a linear relationship between two errorless measurements of the same object (substance, quantity). We propose an iterative algorithm for estimating the calibration line and also give confidence ellipses for the location of unknown errorless results of measurement. Moreover, illustrative examples from the fields of geology, geochemistry and medicine are included. It is shown that the iterative algorithm converges to the same values as those obtained using the standard TLS techniques. Fitted lines and confidence regions are presented for both original and transformed compositional data. The paper contains basic principles of linear models and addresses many related problems.     

Streamlining for democracy: Intercultural predispositions of the Croatian secondary school population

This work interprets the results of empirical research conducted into the intercultural predispositions of secondary school students in Croatia. Data were collected in 1993 and in 1998, using specially constructed questionnaires in which, for a variety of democratic values, a Likert-type battery of questions, were given to respondents. In 1993 the stratified research sample consisted only of secondary school students, while in 1998 the research sample also included students, parents and teachers. An analysis of the results shows that: (1) students had, generally speaking, affirmative attitudes both in 1993 and 1998 and that the hierarchy of support for these values remained the same; and (2) all three groups examined in 1998 shared a common hierarchy of values. However, they differed in the degree to which they accepted democratic values; teachers ranked the highest, students the lowest. The fact that students' attitudes were much closer to their parents' than to their teachers' leads to the conclusion that schools are not the major factor in the "political" socialization of young people in Croatia. This indicates a need for the introduction of new curriculum in all secondary schools. This curriculum should include educational content that emphasizes democratic values and intercultural relations, and methods that stress students' participation through action, reciprocity, dialogue, and solidarity, led by well-trained teachers.     

Mindfulness in parenting adolescents:love breeds love,hate breeds hate

ABSTRACT

After several years of intensive parental skills training for parents of adolescents, extra topics were arising that were not covered in the program’s curriculum. Stress, uncertainness, and strong emotions in dealing with adolescents and how to make positive contact were important issues that parents were still concerned about when leaving the group. This article describes the experiences of how extramindful parenting group training was used after the formal parenting skills training group ended. Parents were then learning to listen to the child with full attention, emotional awareness of the self and child, self-regulation in the parenting relationship, and self-compassion.     

‘We can’t just put any belly-dancer into the program’: cultural activism as boundary work in the city of Bratislava

Festivals are an increasingly more popular form of contemporary cultural activism. Countering prejudice through arts, using culture as a tool of communication, and creating an opportunity for marginalised groups to participate in public life, they represent a specific and novel means of civic activism. In this paper, I introduce a case study of the multicultural festival [fjú?n], aiming to enhance the public visibility of ‘new minorities’ and bring attention to the ethnic and cultural diversity in the city of Bratislava, Slovakia. Building on a festival ethnography and drawing on the perspective of boundary work [Jaworsky, B. Nadya. 2016. The Boundaries of Belonging: Online Work of Immigration-related Social Movement Organizations. Palgrave Macmillan], I show how the festival organisers work towards crossing and blurring symbolic boundaries in society. I offer a close interpretive reading of their attempts at capturing public places and cultivating a diverse language-scape, while showing how they simultaneously maintain, solidify, or even inscribe new boundaries. I conclude by raising critical points about the potential of activist cultural festivals to shift symbolic boundaries in the long run and serve as tools of social inclusion.     

Determining the minimum duration of treatment in tuberculosis: An order restricted non-inferiority trial design

Tuberculosis (TB) is one of the biggest killers among infectious diseases worldwide. Together with the identification of drugs that can provide benefits to patients, the challenge in TB is also the optimisation of the duration of these treatments. While conventional duration of treatment in TB is 6 months, there is evidence that shorter durations might be as effective but could be associated with fewer side effects and may be associated with better adherence. Based on a recent proposal of an adaptive order-restricted superiority design that employs the ordering assumptions within various duration of the same drug, we propose a non-inferiority (typically used in TB trials) adaptive design that effectively uses the order assumption. Together with the general construction of the hypothesis testing and expression for type I and type II errors, we focus on how the novel design was proposed for a TB trial concept. We consider a number of practical aspects such as choice of the design parameters, randomisation ratios, and timings of the interim analyses, and how these were discussed with the clinical team.     

The role of experts in forming family policy under an adversarial subsystem in the Czech Republic

This article analyzes the interplay between policymakers and scientists in developing the Family Policy Plan for the Czech Republic in 2017. As former members of the government commission that developed the plan, we base the article on participatory observation. When we joined the commission, a ‘window of opportunity’ had opened as the country for the first time ever had feminist-friendly minister and vice-minister of labour and social affairs. We explain why due to the inter- and intra-party dynamics, the parental leave reform to introduce ‘daddy months’ failed. We argue an adversarial subsystem existed in that the three coalition partners disagreed on the reform. According to Ingold and Gschwend (2014), under such circumstances, scientists play a strategic role, especially if there is unity among them. However, although there was basic unity among the scientists in the commission, the coalition partners at the governing level were able to block or water down the reform proposal under the study.     

Disorganized attachment,mentalization and dissociation in context of childhood trauma: Implications for depressive symptoms

Extensive evidence indicates that adults with experience of childhood trauma and disorganised attachment are at a higher risk of suffering from depressive symptoms, while at the same time dissociation and mentalisation are very important risk and protective factors in this relation. Although mentalisation and dissociation are mentioned as potential mediators of this relationship, very few studies have analysed the mutual relations between these variables. Bearing in mind the importance of creating more specific and effective ways for dealing with depression, especially within vulnerable groups such as the traumatised, the aim of this research is to examine a serial mediation model in which disorganisation is modelled as effecting a decrease in mentalisation, in turn lead to dissociation, thereby resulting in depressive symptoms. Adult respondents (N = 153) with a history of interpersonal childhood trauma were selected from a larger geographical cluster sample from the general population of Serbia. The respondents filled in a battery of instruments, including The Childhood Traumatic Events Scale, Relationship Questionnaire – CV, Patient Health Questionnaire, Short Scale for the Assessment of Stress-Related Dissociation Symptomatology and the Mentalisation Scale. Our findings suggest that disorganisation has an effect on depression by leading to a decrease in the ability to mentalise, which further triggers dissociation, resulting in depressive symptoms as a final consequence (estimated indirect effect = 0.014, 95 percent CI = 0.005 to 0.026). Additionally, the specific indirect effect involving dissociation as the sole mediator was also significant (estimated indirect effect = 0.058, 95 percent CI = 0.030 to 0.091). Targeting dissociative symptoms in the treatment in patients struggling with depression aftermath of traumatic experience could gain a great benefit for recognition and selection of more adequate treatment strategies.