The role of learning in risk-avoidance strategies during spider–ant interactions

Cognitive abilities used by arthropods, particularly predators, when interacting in a natural context have been poorly studied. Two neotropical sympatric predators, the golden silk spider Nephila clavipes and the ectatommine ant Ectatomma tuberculatum, were observed in field conditions where their interactions occurred regularly due to the exploitation of the same patches of vegetation. Repeated presentations of E. tuberculatum workers ensnared in their web triggered a progressive decrease in the capture response of N. clavipes. All the spiders that stopped trying to catch the ant on the second and/or third trial were individuals that had been bitten during a previous trial. Behavioural tests in natural field conditions showed that after a single confrontation with ant biting, spiders were able to discriminate this kind of prey more quickly from a defenceless prey (fruit flies) and to selectively and completely suppress their catching response. This one-trial aversive learning was still effective after 24 h. Likewise, E. tuberculatum workers entangled once on a N. clavipes web and having succeeded in escaping, learned to escape more quickly, breaking through the web by preferentially cutting spiral threads (sticky traps) rather than radial threads (stronger structural unsticky components) or pursuing the cutting of radials but doing it more quickly. Both strategies, based on a one-trial learning capability, obviously minimize the number of physical encounters between the two powerful opponents and may enhance their fitness by diminishing the risk of potential injuries resulting from predatory interactions.     

Does Spousal Support Moderate the Association Between Perceived Racial Discrimination and Depressive Symptoms among African American Couples?

Social stress theory proposes that stress resulting from one's social position in society leads to fewer coping resources, and subsequently causes an increase in mental health problems. Guided by this framework, we investigated whether the relationship between perceived discrimination and depressive symptoms was moderated by spousal social support in a sample of 487 African American heterosexual couples. Using the actor‐partner interdependence model, findings suggested that female partner's perceived racial discrimination was predictive of her depressive symptomology irrespective of spousal support and male partner's perceived racial discrimination was predictive of depressive symptomology only among men with low levels of spousal support. No partner effects were present. The results demonstrate the need to examine variability in social stress and mental health outcomes for those in close relationships.     

Mutually Exclusive Planning and the Simple View

There have been a number of challenges to the Simple View—the view that an intention to A is necessary if an agent is to A intentionally. Michael Bratman’s celebrated video game case has convinced many that the view is false. This article presents a novel objection to Bratman’s case. It is argued, first, that the Simple View is not undermined by the case, and second, that the real import of the case is that it raises the question of how we can rationally intend mutually exclusive ends. I offer a solution to this puzzle that draws on what I call the Self-Evaluation aspect of intention.     

Prospective Association of Childhood Receptive Vocabulary and Conduct Problems with Self-Reported Adolescent Delinquency: Tests of Mediation and Moderation in Sibling-Comparison Analyses

Associations among receptive vocabulary measured at 4–9 years, mother-reported childhood conduct problems at 4–9 years, and self-reported adolescent delinquency at 14–17 years were assessed using data from a prospective study of the offspring of a large U.S. nationally representative sample of women. A novel quasi-experimental strategy was used to rule out family-level confounding by estimating path-analytic associations within families in a sibling comparison design. This allowed simultaneous tests of the direct and indirect effects of receptive vocabulary and childhood conduct problems, and of their joint moderation, on adolescent delinquency without family-level environmental confounding. The significant association of receptive vocabulary with later adolescent delinquency was indirect, mediated by childhood conduct problems. Furthermore, a significant interaction between receptive vocabulary and childhood conduct problems reflected a steeper slope for the predictive association between childhood conduct problems and adolescent delinquency when receptive vocabulary scores were higher. These findings of significant indirect association were qualitatively identical in both population-level and within-family analyses, suggesting that they are not the result of family-level confounds.     

Connecting Personal History and Organizational Context: Suggestions for Developing Educational Programs for Youth Soccer Coaches

Literature underscores the complex role of coaches in sport organizations, especially in youth sectors. Their need for support, not only on the technical level, is emerging. In recent years an interesting international debate has evolved regarding what education is most suitable to support coach development. The article intends to enter this debate by proposing an educational model for youth soccer coaches. This educational proposal is the outcome of reflection that originated from various experiences with about 110 Italian youth soccer coaches over the past six years. The first part is dedicated to a review of the literature on coaching education, and the second to the educational model presented (e.g., theoretical background, characteristics, setting, outcomes, and considerations regarding the management of this educational process). The strength of this model was precisely to have put some recurrent issues in dialogue with the specific organizational contexts in which the educational programs were implemented.     

Research Misconduct in the Age of Open Science: The Case of STAP Stem Cells

In early 2014, Dr Haruko Obokata and her co-authors caused a global media storm by publishing two scientific papers in Nature on stem cells. The papers proposed a surprisingly simple new method called stimulus-triggered acquisition of pluripotency (STAP) to generate pluripotent stem cells for research purposes in a fast and inexpensive way. To the dismay of many, both papers were retracted within six months of their release due to data fabrication and falsification. The rise and fall of the STAP research illustrates the impacts of open science practices of quality control and validation on new scientific claims. In the STAP case, collective action generated through two online forums—the Knoepfler Lab Stem Cell Blog and PubPeer—exposed not only data manipulation in the two papers but also the irreproducibility of the purported new cellular reprogramming method. The case brings to the fore the tentative possibilities as well as potential pitfalls of ‘accelerated virtual witnessing’ through crowdsourced post-publication peer reviews that value accessibility and inclusiveness. Indeed, it calls for empirically grounded discussion on the ongoing reconfiguration of the shared system of values and norms or the moral economy of science.     

Methods for Practising Ethics in Research and Innovation: A Literature Review,Critical Analysis and Recommendations

This paper provides a systematic literature review, analysis and discussion of methods that are proposed to practise ethics in research and innovation (R&I). Ethical considerations concerning the impacts of R&I are increasingly important, due to the quickening pace of technological innovation and the ubiquitous use of the outcomes of R&I processes in society. For this reason, several methods for practising ethics have been developed in different fields of R&I. The paper first of all presents a systematic search of academic sources that present and discuss such methods. Secondly, it provides a categorisation of these methods according to three main kinds: (1) ex ante methods, dealing with emerging technologies, (2) intra methods, dealing with technology design, and (3) ex post methods, dealing with ethical analysis of existing technologies. Thirdly, it discusses the methods by considering problems in the way they deal with the uncertainty of technological change, ethical technology design, the identification, analysis and resolving of ethical impacts of technologies and stakeholder participation. The results and discussion of our literature review are valuable for gaining an overview of the state of the art and serve as an outline of a future research agenda of methods for practising ethics in R&I.