Taken by strum: ukuleles and participatory music-making in Hamilton, Aotearoa/New Zealand

Ethnographic study of ukulele playing in Hamilton, N

Predators modify the temperature dependence of life-history trade-offs

Although life histories are shaped by temperature and predation, their joint influence on the interdependence of life-history traits is poorly understood. Shifts in one life-history trait often necessitate shifts in another—structured in some cases by trade-offs— leading to differing life-history strategies among environments. The offspring size–number trade-off connects three traits whereby a constant reproductive allocation (R) constrains how the number (O) and size (S) of offspring change. Increasing temperature and size-independent predation decrease size at and time to reproduction which can lower R through reduced time for resource accrual or size-constrained fecundity. We investigated how O, S, and R in a clonal population of Daphnia magna change across their first three clutches with temperature and size-independent predation risk. Early in ontogeny, increased temperature moved O and S along a trade-off curve (constant R) toward fewer larger offspring. Later in ontogeny, increased temperature reduced R in the no-predator treatment through disproportionate decreases in O relative to S. In the predation treatment, R likewise decreased at warmer temperatures but to a lesser degree and more readily traded off S for O whereby the third clutch showed a constant allocation strategy of O versus S with decreasing R. Ontogenetic shifts in S and O rotated in a counterclockwise fashion as temperature increased and more drastically under risk of predation. These results show that predation risk can alter the temperature dependence of traits and their interactions through trade-offs. Includes supplemental material

Does time pressure impair performance? An experiment on queueing behavior

Conte A, Scarsini M, Sürücü O. Does time pressure impair performance? An experiment on queueing behavior. Center for Mathematical Economics Working Papers. Vol 538. Bielefeld: Center for Mathematical Economics; 2015.We experimentally explore the effects of time pressure on decision making. Under different time allowance conditions, subjects are presented with a queueing situation and asked to join one of two queues that differ in length, server speed, and entry fee. The results can be grouped under two main categories. The first one concerns the factors driving customers' decisions in a queueing system. Only a proportion of subjects behave rationally and use the relevant information efficiently. The rest of the subjects seem to adopt a rule of thumb that ignores the information on server speed and follows the shorter queue. The second category is related to the effects of time pressure on decision performance. A significant proportion of the population is not affected by time limitations and shows a consistent behavior throughout the treatments. On the other hand, the majority of subjects' performance is impaired by time limitations. More importantly, this impairment is not due to the stringency of the limitation but mainly due to the fact that being exposed to a time limitation, even to a loose one, brings along stress and panic, and causes subjects to use time inefficiently

Climate change and freshwater zooplankton: what does it boil down to?

Recently, major advances in the climate–zooplankton interface have been made some of which appeared to receive much attention in a broader audience of ecologists as well. In contrast to the marine realm, however, we still lack a more holistic summary of recent knowledge in freshwater. We discuss climate change-related variation in physical and biological attributes of lakes and running waters, high-order ecological functions, and subsequent alteration in zooplankton abundance, phenology, distribution, body size, community structure, life history parameters, and behavior by focusing on community level responses. The adequacy of large-scale climatic indices in ecology has received considerable support and provided a framework for the interpretation of community and species level responses in freshwater zooplankton. Modeling perspectives deserve particular consideration, since this promising stream of ecology is of particular applicability in climate change research owing to the inherently predictive nature of this field. In the future, ecologists should expand their research on species beyond daphnids, should address questions as to how different intrinsic and extrinsic drivers interact, should move beyond correlative approaches toward more mechanistic explanations, and last but not least, should facilitate transfer of biological data both across space and time

Negative Moderating Effect of General Self-Efficacy on the Relationship between Need for Cognition and Cognitive Effort

This study demonstrates the negative moderating effect of general self-efficacy on the relationship between need for cognition, which refers to stable individual differences in people's tendencies to engage in and enjoy cognitive activity, and cognitive effort. This negative moderating effect of general self-efficacy has been termed “plasticity.” Scholars assume the relationship between need for cognition and cognitive effort is true by definition. The study uses data from 144 U.S. college students and employs moderated regression analysis followed by subgroup analysis to demonstrate plasticity. The results set a boundary condition to the generally presumed relationship between need for cognition and cognitive effort, thereby improving the understanding of how these phenomena are related

The Oblique Art of Shoes: Popular Culture, Aesthetic Pleasure, and the Humanities

This article addresses popular culture and the humanities. It uses shoes as an object of analysis to interrogate the place and function of aesthetic pleasure in critical thinking and cultural practice in the age of globalization and the neoliberal university. Tracking contemporary articulations of the shoe as a popular cultural object, the discussion begins by recalibrating Judith Halberstam’s concept of the "queer art of failure" in terms of what I call an oblique art of shoes. The discussion also revisits Fredric Jameson’s footwear musings in Postmodernism, or the Cultural Logic of Late Capitalism to elucidate a missing link between aesthetics, affect, and materiality in the critique of popular culture. The article accordingly works with obliqueness in two ways. First, my approach is oblique in the sense that I address popular culture and the humanities indirectly via the aesthetics and materiality of the shoe. Second, like many popular objects, I find shoes themselves to have an oblique relationship with art and so-called high culture. My argument - developed in relation to examples from visual art, museum exhibitions, urban space, and advertising billboards - is that analyzing the oblique art of shoes can make newly visible the extent to which aesthetic pleasure can inform, and sometimes even constitute, critical practice