Failure mechanism in porous materials under compression: crackling noise in mesoporous SiO2

The failure mechanism of porous materials under uniaxial stress has been investigated experimentally. Microporous SiO₂, Vycor, has been subjected to slowly increasing compressive uniaxial stress with stress rates between 0.2 and 12.2?kPa/s. With increasing stress the strain changes stepwise with acoustic emission correlated with each volume collapse. The acoustic emission followed the characteristics of ‘crackling noise’ with a power law distribution over an exceptionally large interval of 6 decades at the slowest stress rate. The power law exponent is ?1.39. Possible applications in mining industry and others are discussed.     

Why Reasons Skepticism is Not Self‐Defeating

Abstract: Radical meta‐normative skepticism is the view that no standard, norm, or principle has objective authority or normative force. It does not deny that there are norms, standards of correctness, and principles of various kinds that render it possible that we succeed or fail in measuring up to their prerogatives. Rather, it denies that any norm has the status of commanding with objective authority, of giving rise to normative reasons to take seriously and follow its demands. Two powerful transcendental arguments challenge this view. First, skepticism is said to be self‐defeating: Settling what to accept, and in particular whether to accept skepticism, appears to be a reason‐guided enterprise. How can skeptics coherently support their view by citing reasons in their favor after they just rejected them throughout? Second, there is the practical‐deliberative version, most recently developed by David Enoch: We are essentially deliberative creatures. Yet deliberation appears to require that there are correct answers in the form of normative reasons to our practical questions. Thus confidence in the sensible nature of deliberation should inspire confidence in reasons. The essay undermines both transcendental arguments by demonstrating, first, how to support skepticism without deserting its tenets, and, second, how to deliberate in skeptical fashion.     

Computational modeling/cognitive robotics complements functional modeling/experimental psychology

This position paper explores the possible contributions to the science of psychology from insights obtained by building and experimenting with cognitive robots. First, the functional modeling characteristic of experimental psychology is discussed. Second, the computational modeling required for cognitive robotics is described, and possible experiments with them are illustrated. Next, we argue that cognitive developmental robots, robots that “live” through a development phase where they learn about their environments in several different modes, can provide additional benefits to the science of psychology. Finally, the reciprocal interactions between computational modeling/cognitive robotics and functional modeling/experimental psychology are explored. We conclude that each can contribute significantly to the other.     

Preference reversal in multiattribute choice

A central puzzle for theories of choice is that people's preferences between options can be reversed by the presence of decoy options (that are not chosen) or by the presence of other irrelevant options added to the choice set. Three types of reversal effect reported in the decision-making literature, the attraction, compromise, and similarity effects, have been explained by a number of theoretical proposals. Yet a major theoretical challenge is capturing all 3 effects simultaneously. We review the range of mechanisms that have been proposed to account for decoy effects and analyze in detail 2 computational models, decision field theory (Roe, Busemeyer, & Townsend, 2001) and leaky competing accumulators (Usher & McClelland, 2004), that aim to combine several such mechanisms into an integrated account. By simulating the models, we examine differences in the ways the decoy effects are predicted. We argue that the LCA framework, which follows on Tversky's relational evaluation with loss aversion (Tversky & Kahneman, 1991), provides a more robust account, suggesting that common mechanisms are involved in both high-level decision making and perceptual choice, for which LCA was originally developed.     

The demise of short-term memory revisited: empirical and computational investigations of recency effects

In the single-store model of memory, the enhanced recall for the last items in a free-recall task (i.e., the recency effect) is understood to reflect a general property of memory rather than a separate short-term store. This interpretation is supported by the finding of a long-term recency effect under conditions that eliminate the contribution from the short-term store. In this article, evidence is reviewed showing that recency effects in the short and long terms have different properties, and it is suggested that 2 memory components are needed to account for the recency effects: an episodic contextual system with changing context and an activation-based short-term memory buffer that drives the encoding of item-context associations. A neurocomputational model based on these 2 components is shown to account for previously observed dissociations and to make novel predictions, which are confirmed in a set of experiments.     

Work conditions and employees' self-set goals: goal processes enhance prediction of psychological distress and well-being

Although previous theory and research suggest that employee well-being should be predicted by work conditions (viz., Karasek and colleagues' job demands-control-social support [J-DCS] model), other factors are also likely to be important. In this study, the authors consider correlates of employee psychological distress and well-being using a goal-focused approach grounded in Ford's (1992) motivational systems theory. Specifically, work conditions and midlevel work goal processes (WGP) were examined in a questionnaire study of health care employees. Regarding predictions derived from the J-DCS model, the authors found full support for the iso-strain, partial support for the nonlinearity, and no support for the buffer hypothesis. Of importance, however, WGP (i.e., cognitions and emotions involved in the pursuit of self-set work goals) explained variance in job satisfaction, burnout, depression, and somatic complaints, over and above that of the J-DCS model. This suggests that investigation of WGP can enhance our understanding of employee psychological distress and well-being.     

Dolphin pointing is linked to the attentional behavior of a receiver

In 2001, Xitco et al. (Anim Cogn 4:115–123) described spontaneous behaviors in two bottlenose dolphins (Tursiops truncatus) that resembled pointing and gaze alternation. The dolphins spontaneous behavior was influenced by the presence of a potential receiver, and the distance between the dolphin and the receiver. The present study adapted the technique of Call and Tomasello [(1994) J Comp Psychol 108:307–317], used with orangutans to test the effect of the receivers orientation on pointing in these same dolphins. The dolphins directed more points and monitoring behavior at receivers whose orientation was consistent with attending to the dolphins. The results demonstrated that the dolphins pointing and monitoring behavior, like that of apes and infants, was linked to the attentional behavior of the receiver.     

Therapist perspectives on working with fears,blocks and resistances to compassion in compassion focused therapy

Objective

A core aspect of compassion focused therapy (CFT) is addressing fears, blocks, and resistances (FBRs) to compassion. How CFT therapists do this with clients remains unclear. This study aims to explore the perspectives of well-trained, experienced CFT therapists regarding how they work with FBRs in the context of CFT.

Methods

A qualitative study was conducted. Participants were asked five open-ended questions regarding (a) their experiences of working with FBRs to compassion, (b) how they understand and formulate FBRs, (c) specific ways they address FBRs, (d) how other therapists might learn about working with FBRs, and (e) their top recommendations. A total of 64 participants completed the online questionnaire, and the qualitative data were analysed using thematic analysis.

Results

The analysis produced four interrelated superordinate themes: (a) Getting “alongside” and “behind”: The central role of formulation, (b) “It's not your fault”: Psychoeducation, (c) “Get experiential”: An emphasis on experiential interventions, and (d) “Respect the wisdom”: The importance of therapeutic process.

Conclusions

Working with FBRs to compassion is critical in CFT. Understanding the wisdom in the client's FBRs, and validating and de-shaming the client's FBRs are crucial. We provide clinical recommendations regarding working with FBRs as part of CFT.     

On Understanding Worship in School. Part One: on schooling and education

As worship in school is currently a topic of public debate, it may be useful to re‐examine one of the influential books on the subject,School Worship, an Obituary, by Professor J.M. Hull, published in 1975. I shall argue that it was mistaken in important respects. His case for the abolition of worship in schools was made on essentially philosophical grounds. He sought not just to make the weak point that it is increasingly difficult to overcome many of the practical obstacles, but to make the stronger claim that the practice is conceptually incoherent. This is what makes his position a philosophical one and, as such, subject to philosophical scrutiny. One of the factors that appears to influence Hull's position is his conception of philosophy. Despite his careful analysis of the concepts of education and worship, at a critical point his account seems to rely on a form of philosophical evidential‐ism. In opposition to Hull, I take the view that this is a mistake. A more consistent, philosophical approach of conceptual clarification would have shown that there are various forms of education and that, in at least one case, it not only makes sense to worship as a part of the educational process, but that worship is of its essence as its motivation, substance and goal. The implication of this conclusion is that politicians are not intellectually confused in insisting on a form of education in which worship has an integral role. Whether it is practicable, socially desirable and politically reasonable in an increasingly secular and religiously plural society is quite another matter. Given the current state of society, one might conclude that the government should take a more pluralistic approach through its legislation. The government is there to serve a variety of communities and interests. One might reasonably argue that if the state‐school system is genuinely to serve this plural society there should be more scope for incorporating into the education system a diversity of practice. There might then be different schools with distinctive concepts of education, consistent with the needs and aspirations of the diverse communities and interests. In this part of the article I shall look particularly at the way in which schooling might accommodate a variety of activities and raise the question as to why worship might not be one of them. Hull's answer seems to hinge on the definition of worship and on the definition of education. The former I shall examine in Part Two, but here I shall seek to identify and examine that feature of education that Hull claims would exclude worship in school.