From ultrafast to slow: Heating rate dependence of the glass transition temperature in metallic systems

When a solid crosses the glass transition, viscous flow sets in and the glass transforms into a supercooled liquid. The glass transition temperature exhibits a heating rate dependence which was previously observed to follow a Vogel–Fulcher–Tammann (VFT) equation. Here we report on a change in the heating rate dependence of the glass transition, determined by the distinct increase in the specific heat capacity, of a metallic glass. We combine standard techniques such as differential scanning calorimetry with recently developed ohmic heating techniques in order to cover seven orders of magnitude in heating rate. Contrary to previous reports, our results show that the change of the glass transition temperature cannot be described by a single VFT equation. Instead we find two distinct regimes which independently follow a VFT expression.     

The Way of Ecumenism: Gratitude and Commitment

This address to the Ecumenical Kirchentag in Germany in 2003 takes as its starting point the symbol of the church as the people of God on the way together to describe the ecumenical movement. This is a path that leads out of the security of structures, relying on the promise of God as a response to the call of the gospel to faith and the path of discipleship – the way of pilgrimage as it was described by the World Conference on Faith and Order in 1993 in Santiago de Compostela. After looking back at the milestones on the ecumenical journey toward communion in life, faith, and witness, the address highlights the significance of a mutual recognition of baptism by churches as representing a “Copernican revolution” in ecumenical dialogue, in which churches would commit themselves to mutual accountability in matters of faith and church order.     

Exploration and exploitation during sequential search

When we learn how to throw darts we adjust how we throw based on where the darts stick. Much of skill learning is computationally similar in that we learn using feedback obtained after the completion of individual actions. We can formalize such tasks as a search problem; among the set of all possible actions, find the action that leads to the highest reward. In such cases our actions have two objectives: we want to best utilize what we already know (exploitation), but we also want to learn to be more successful in the future (exploration). Here we tested how participants learn movement trajectories where feedback is provided as a monetary reward that depends on the chosen trajectory. We mathematically derived the optimal search policy for our experiment using decision theory. The search behavior of participants is well predicted by an ideal searcher model that optimally combines exploration and exploitation.     

Differential effects of social and non‐social reward on response inhibition in children and adolescents

An important issue in the field of clinical and developmental psychopathology is whether cognitive control processes, such as response inhibition, can be specifically enhanced by motivation. To determine whether non‐social (i.e. monetary) and social (i.e. positive facial expressions) rewards are able to differentially improve response inhibition accuracy in typically developing children and adolescents, an ‘incentive’ go/no‐go task was applied with reward contingencies for successful inhibition. In addition, the impact of children's personality traits (such as reward seeking and empathy) on monetary and social reward responsiveness was assessed in 65 boys, ages 8 to 12 years. All subjects were tested twice: At baseline, inhibitory control was assessed without reward, and then subjects were pseudorandomly assigned to one of four experimental conditions, including (1) social reward only, (2) monetary reward only, (3) mixed social and monetary reward, or (4) a retest condition without reward. Both social and non‐social reward significantly improved task performance, although larger effects were observed for monetary reward. The higher the children scored on reward seeking scales, the larger was their improvement in response inhibition, but only if monetary reward was used. In addition, there was a tendency for an association between empathic skills and benefits from social reward. These data suggest that social incentives do not have an equally strong reinforcing value as compared to financial incentives. However, different personality traits seem to determine to what extent a child profits from different types of reward. Clinical implications regarding probable hyposensitivity to social reward in subjects with autism and dysregulated reward‐seeking behaviour in children with attention‐deficit/hyperactivity disorder (ADHD) are discussed.     

The Future of Theological Education in Central and Eastern Europe: Challenges for Ecumenical Learning in the 21st Century1

The article focuses on the context of Central and Eastern Europe. The introduction surveys earlier references to this context in the activities of the WCC programmes on theological education. It then characterizes the situation regarding theological education in this region, especially after the changes of 1989/90. The central section summarizes the earlier discussions on ecumenical learning, especially in the WCC, and applies the insights gained to the field of theological education. The concluding part spells out some of the consequences for the future of theological education in Central and Eastern Europe looking especially at the situation in the Orthodox churches, the Protestant minority churches and the evangelical communities.     

CRITICAL REMARKS ON THE COGNITIVE SCIENCE OF RELIGION

Cognitive explanations of religious beliefs propose an evolutionary past in which humans had to possess certain cognitive adaptations to survive. The aim of this article is to show that some cognitive accounts may overvalue the putative role of cognition. One such cognitive idea is an assumption that cognition has been evolutionarily shaped only, or most importantly, in the Pleistocene. This idea seems common among writers on the cognitive science of religion (CSR), but is mistaken. Cognition has been shaped throughout evolution. Another idea is that components of religion could not have been produced by natural selection (the hypothesis that religion is a by-product). But the article suggests that there are some domains in the field of religion and religious components that could be acquired and transmitted despite or even against alleged cognitive biases. The aim of this article is to argue for an extended approach that combines a cognitive account with functional naturalistic approaches, including an adaptationist one. Such distinction could imply that cognition is not functional. Obviously, this is not the case since cognition is the process of knowing, and surely knowledge is functional. However, the main argument for such a distinction lies in the key idea of the cognitive account that as far as cognition is functional and adaptive, religious components are not. Functionalism or “adaptivism” concerning cognition contradicts functionalism concerning religion. Numbers of scholars who consider themselves part of CSR seem also to consider both cognition and religion adaptive. However, in regard to components of religion, their adaptive, functional power is only secondary. The article concludes that the study of religion—as the study of cultural evolution in general—should include a pluralistic methodology combining cognitive and evolutionary accounts with the specificity of cultural evolution.     

Lack of inhibition: a motivational deficit in children with attention deficit/hyperactivity disorder and children with traumatic brain injury.

Recent research has demonstrated that both brain-injured children and children with attention deficit/hyperactivity disorder (ADHD) suffer from response inhibition deficits. To investigate whether these deficits can be influenced by motivational factors, the stop-signal task was performed with and without reward contingencies for successful inhibition. Three groups of children between 8 and 12 years of age, participated in the study: 31 children with ADHD, 37 with traumatic brain injuries (TBI), and 26 normal controls. Results indicated that, although all groups showed comparable learning effects, reward contingencies had different effects on the groups. Whereas the performance of children with ADHD under reward contingencies were brought up to the performance level of normal controls, rewards were found less effective at improving response inhibition in children with TBI. The results further support a motivational/energetic explanation of the inhibitory deficit in children with ADHD, and of a primary response inhibition deficit due to structural brain damage in children with TBI.     

Using motivational interviewing as a supplement to obesity treatment: a stepped-care approach.

OBJECTIVE: This investigation was designed to improve behavioral weight loss program (BWLP) treatment outcomes by providing stepped care (SC) to individuals experiencing difficulties with weight loss during treatment. SC entails transition to more intensive treatments when less intensive treatments fail to meet treatment goals. In a BWLP, motivational interviewing (MI) may increase participants' motivation toward behavioral change and thus complement the acquisition of behavioral change skills. It was hypothesized that BWLP+SC (MI) participants (i.e., participants who failed to meet weight loss goals and received MI) would demonstrate superior treatment outcomes when compared with BWLP (SC matched) participants (i.e., participants who failed to meet weight loss goals but did not receive MI). DESIGN: Fifty-five obese, sedentary adults were randomly assigned to a BWLP+SC or a BWLP. MAIN OUTCOME MEASURES: Changes in weight, cardiorespiratory fitness, self-reported physical activity, and diet (i.e., calories, percentage daily intake of fat, protein, and carbohydrates) in response to treatment were assessed. RESULTS: Participants significantly decreased their weight, increased physical activity/fitness, and improved dietary intake (ps<.05). BWLP+SC (MI) participants lost more weight and engaged in greater weekly exercise than BWLP (SC matched) participants who did not receive MI (ps<.05). CONCLUSION: For individuals experiencing weight loss difficulties during a BWLP, MI may have considerable promise.     

Response speed as an individual difference: Its role in moderating the agreeableness-anger relationship

Anger is an emotion that is precipitated by hostile attitudes and high arousal. The trait of agreeableness is a moderately inverse predictor of hostile attitudes and anger. Relations between agreeableness and anger are likely to be stronger to the extent that the person can be characterized as high in dispositional arousal. Arousal-related manipulations speed responses in cognitive tasks. Thus, individual differences in response speed may be informative concerning general tendencies toward aroused states. In three studies (N = 319) individual differences in response speed in basic choice tasks interacted with agreeableness to predict state-related experiences of anger. Specifically, the highest levels of anger were observed among fast/disagreeable individuals. The utility of this probe in future studies is discussed.