Infinity Machines and Creation Ex Nihilo

In this paper a simple model in particle dynamics of a well-known supertask is constructed (the supertask was introduced by Max Black some years ago). As a consequence, a new and simple result about creation ex nihilo of particles can be proved compatible with classical dynamics. This result cannot be avoided by imposing boundary conditions at spatial infinity, and therefore is really new in the literature. It follows that there is no reason why even a world of rigid spheres should be eternal, as has been erroneously assumed, especially since the time of Newton. This revised version was published online in August 2006 with corrections to the Cover Date.     

The impact of different procedures to arouse mortality awareness on various worldview dimensions

An experimental study was carried out in order to explore two aspects of the terror management theory that have received little attention until now. The first objective was to see whether the different procedures to arouse mortality awareness have the same effects in certain dimensions included within the general construct of ‘worldviews’ (namely, commitment to life‐after‐death beliefs, Eurocentrism and xenophobia, European identity and the importance attached to the family and offspring in personal growth). The second objective was to study the role played by three mediators (emotions, death‐thoughts accessibility and self‐esteem) in the effects of mortality awareness on worldviews. The results revealed that different death reminders influenced different worldview dimensions and that emotions played a major role in the process.     

Case–contrast study about parent–infant interaction in a Brazilian sample of siblings of children with autism spectrum disorders

Siblings of children with autism spectrum disorders (ASD) present greater susceptibility to developmental problems, in comparison with siblings of typically developing children. The greater prevalence of mental health disorders among parents of children with ASD increases younger siblings’ vulnerability to emotional problems. The aim of this study is to compare the interaction between carers and babies aged 2 to 26 months (M = 11.7, SD = 6.9) who are siblings of children with ASD (ASD dyads) with the interaction of dyads of siblings of typically developing children (TD dyads). The protocol of Clinical Indicators of Risk for Child Development and the Coding Interactive Behaviour measures were used to evaluate interaction. ASD dyads presented higher scores of constriction in their interaction, P = .024, with babies presenting higher scores of withdrawal behavior, P = .003, and carers presenting higher scores of depressive mood, P = .008, when compared to TD dyads. The ASD dyads have interactive impairments more frequently than do the TD dyads.     

Fight,Flight, or Remain Silent? Juggling Multiple Accountabilities throughout the Formative Stage of a Neighborhood Revitalization Initiative

This paper describes the experiences of a research team as they navigated uncertain ethical and political terrain throughout the formative stage of a public housing redevelopment project. Specifically, we discuss the challenges related to balancing multiple accountabilities and the tensions among the various roles and responsibilities that emanated from different accountabilities. Due to contractual obligations to our funding source, established relations with community partners, and an ethical imperative to align with those holding the least power, we grappled with embodying multiple and often conflicting roles. Without oversight provided by our university institutional review board or a clear ethical framework for community psychology research and action, our team was left to negotiate the challenges that emerged through critical reflection and financial considerations. Throughout the case example presented in this paper, we highlight our difficulty in ethical decision‐making with respect to the principles of obligation, disclosure, consent, commitment, and professionalism. Community psychologists often straddle the realms of academia, community partnerships, and conscious engagement with little guidance in navigating often conflicting roles and value systems. We present our narrative to highlight the complexity of scholar‐activism in the context of community psychology and the necessity for developing ethical standards and guidelines tailored to meet the unique needs of community psychologists.     

Preliminary examination of a couple-based eating disorder prevention program

The purpose of the current study was to investigate a new dissonance-based prevention program that is based on the dual pathway model of eating disorders within the context of an individual's romantic relationship. A total of 209 dating couples participated in a couple-based prevention program or an assessment-only condition and completed measures of body dissatisfaction, thin-ideal internalization, disordered eating, negative affect, and relationship satisfaction at two time points (approximately one week apart) and approximately half of the sample completed 1-month follow-up measures. The prevention program significantly reduced several key risk factors for eating disorders such as environmental pressures to be thin, internalization of the thin and athletic ideals, state body dissatisfaction, and actual-ideal body discrepancy. Initial support was found for the inclusion of couples in eating disorder prevention programs as a successful way of addressing the thin ideal and its detrimental effects for women.     

The effect of personality variables in the prediction of the execution of different prospective memory tasks in the laboratory

The study of prospective memory (ProM), the remembering of the delayed execution of intentions, has been growing in recent years, and we know quite a bit about the cognitive variables that affect it. But the performance of a task depends on personality variables as well as on cognitive ones, and the role of personality variables in ProM has only been partially studied, the results being less conclusive. We sought to address two main objectives: (1) to quantify the joint influence of cognitive and personality variables on three ProM tasks in the laboratory (two based on events and the other on time), and (2) to identify the personality profiles of those who perform well in these three ProM tasks as opposed to those who do not. The cognitive and personality variables were evaluated with two sessions of 157 participants. The 16 PF-5 was applied (Cattell, Cattell & Cattell, 1993) and other cognitive variables were measured. With the data obtained, we ran several regression analyses to determine how some cognitive variables (sustained attention, verbal fluency, interference, retrospective memory, selective attention) and personality factors (tested using the 16 PF-5) can help to explain the variance in the performance of prospective memory tasks. Our results show that the contribution of personality predictor variables is moderate and smaller than that of the cognitive variables for predicting the execution of ProM tasks in the laboratory. Furthermore the intervention of the personality variables differs depending on the ProM tasks used. Global self-control and rule-consciousness were the personality variables that contributed the most in the prediction of the scores in the ProM tasks that were used.     

An Ounce of Prevention: A Model for Working with Couples At-Risk for Battering

Literature on preventing spousal battering before it starts is virtually non-existent. This article describes a prevention of abuse program that targets couples at-risk for battering. At-risk couples and the process of engaging them in couples counseling are described. The prevention model is based on a Bowenian approach that focuses on partner differentiation and reducing emotionality and promoting rational thinking. It is assumed that increasing differentiation decreases the risk of spousal battering. The various techniques used to facilitate differentiation are presented as well as a case example illustrating a successful prevention of abuse experience.