Children’s Nonverbal Displays of Winning and Losing: Effects of Social and Cultural Contexts on Smiles

We examined the effects of social and cultural contexts on smiles displayed by children during gameplay. Eight-year-old Dutch and Chinese children either played a game alone or teamed up to play in pairs. Activation and intensity of facial muscles corresponding to Action Unit (AU) 6 and AU 12 were coded according to Facial Action Coding System. Co-occurrence of activation of AU 6 and AU 12, suggesting the presence of a Duchenne smile, was more frequent among children who teamed up than among children who played alone. Analyses of the intensity of smiles revealed an interaction between social and cultural contexts. Whereas smiles, both Duchenne and non-Duchenne, displayed by Chinese children who teamed up were more intense than those displayed by Chinese children who played alone, the effect of sociality on smile intensity was not observed for Dutch children. These findings suggest that the production of smiles by children in a competitive context is susceptible to both social and cultural factors.     

Revolution and the Whip of Reaction: Technicians of Power and the Dialectic of Radicalisation

This article argues that sociologically informed studies of revolution tend to underestimate the importance of counter‐revolution and ‘reaction’ in generating radicalisation. Revolutions are inherently political. Most accounts recognise this, but emphasise the executive organs of state – such as monarch, cabinet or ministers – at the expense of the intermediary ‘technicians of power’. Revolutions, however, typically seek to refashion an entire technocracy of power, and in so doing struggle against embedded and powerful sites of reaction. Central to the dynamic of revolution is the ‘purge’ of the technocracy of power. As governing structures are not easily transformed at a stroke, revolutions may be seen as punctuating long processes of struggle. Historically, the governing apparatus has been most effectively revolutionised under conditions of military occupation. The thesis is illustrated here by a narrative of revolution in Europe from the English Civil War to the Liberation of the 1940s, with a coda on ’68.     

A parameter expansion version of the SAEM algorithm

The EM algorithm and its extensions are very popular tools for maximum likelihood estimation in incomplete data setting. However, one of the limitations of these methods is their slow convergence. The PX-EM (parameter-expanded EM) algorithm was proposed by Liu, Rubin and Wu to make EM much faster. On the other hand, stochastic versions of EM are powerful alternatives of EM when the E-step is untractable in a closed form. In this paper we propose the PX-SAEM which is a parameter expansion version of the so-called SAEM (Stochastic Approximation version of EM). PX-SAEM is shown to accelerate SAEM and improve convergence toward the maximum likelihood estimate in a parametric framework. Numerical examples illustrate the behavior of PX-SAEM in linear and nonlinear mixed effects models.     

Someone who Treats you as an Ordinary Human Being ... Homeless Youth Examine the Quality of Professional Care

Professor dr. Micha de Winter, Utrecht University, Department of Child and Adolescent Studies, POB 80.140, 3508 TC Utrecht, the Netherlands. Summary In this article we describe a peer-research project, in whichnineteen homeless youngsters interviewed 190 of their ‘colleagues’about the quality of professional care and the improvementsthat, according to them, should be made. The interviews werefollowed by discussion meetings with social workers and policymakers. The youngsters report mixed feelings about the professionalcare system. On the one hand they think they should do morethemselves, there should not be too much professional interferenceand certainly not a patronizing attitude. On the other hand,they want better advice and assistance which is rather basedon a joint effort. The essence of professional care is, accordingto both the young and the professional participants, to finda balance between independence and assistance. From an educationalpoint of view, social workers and adolescents operate at daggersdrawn. Conflict and opposing views are often an inherent partof the road to gaining autonomy. This process, which is oftenpainful, can only be successfully completed in an atmosphereof sincerity, mutual trust and consultation. Dialogue at alllevels is believed to be a sine qua non in the improvement ofprofessional care for homeless youth.     

Flexible Class of Skew-Symmetric Distributions

Abstract.  We propose a flexible class of skew-symmetric distributions for which the probability density function has the form of a product of a symmetric density and a skewing function. By constructing an enumerable dense subset of skewing functions on a compact set, we are able to consider a family of distributions, which can capture skewness, heavy tails and multimodality systematically. We present three illustrative examples for the fibreglass data, the simulated data from a mixture of two normal distributions and the Swiss bills data.     

Individuelle und kontextuelle Determinanten der Teilhabe an Sozialkapital

We ask for conditions influencing membership in social organizations as strongholds of social capital. Beside individual characteristics, contextual factors such as political, social, or economic settings are also taken into consideration to explain individual decisions to participate in social organizations. The influences of individual and contextual level factors are tested simultaneously in several multi-level analyses. The results show that membership in social associations on the one hand is affected by individual characteristics such as marked trust in others, high level of education, church attendance, strong ties with the neighbourhood, age and sex, and on the other hand by contextual factors such as a catholic social context and institutional settings. In particular, Swiss direct democracy offering larger possibilities of participation facilitates membership in social organizations.     

Efficacy of a group therapy for sexually abused adolescent girls

The effects of a group therapy program for teenage girls reporting child sexual abuse were evaluated by means of a pretest/ post-test design with a control group. The psycho-educational intervention consisted of an average of 20 weekly two-hour meetings. Results of the repeated analyses of variance (ANOVA) revealed a significant improvement in youth participating in the therapy when compared with the control group on measures of post-traumatic stress, internalizing and externalizing behavior problems, coping strategies, relationship with the mother, and sense of empowerment. The findings suggest that the group therapy offered by the Centre d'Intervention en Abus Sexuels pour la Famille (CIASF) was effective in reducing symptoms for sexually abused teenagers.     

Suitability of physical activity questionnaires for older adults in fall-prevention trials: a systematic review

The purpose of the study was to identify physical activity questionnaires for older adults that might be suitable outcome measures in clinical trials of fall-injury-prevention intervention and to undertake a systematic quality assessment of their measurement properties. PubMed, CINAHL, and PsycINFO were systematically searched to identify measurements and articles reporting the methodological quality of relevant measures. Quality extraction relating to content, population, reliability, validity, responsiveness, acceptability, practicality, and feasibility was undertaken. Twelve outcome measures met the inclusion criteria. There is limited evidence about the measures' properties. None of the measures is entirely satisfactory for use in a large-scale trial at present. There is a need to develop suitable measures. The Stanford 7-day Physical Activity Recall Questionnaire and the Community Health Activities Model Program for Seniors questionnaire might be appropriate for further development. The results have implications for the designs of large-scale trials investigating many different geriatric syndromes.