Participant concerns for the Learner in a Virtual Reality replication of the Milgram obedience study

In Milgram's seminal obedience studies, participants' behaviour has traditionally been explained as a demonstration of people's tendency to enter into an 'agentic state' when in the presence of an authority figure: they attend only to the demands of that authority and are insensitive to the plight of their victims. There have been many criticisms of this view, but most rely on either indirect or anecdotal evidence. In this study, participants (n = 40) are taken through a Virtual Reality simulation of the Milgram paradigm. Compared to control participants (n = 20) who are not taken through the simulation, those in the experimental conditions are found to attempt to help the Learner more by putting greater emphasis on the correct word over the incorrect words. We also manipulate the extent to which participants identify with the science of the study and show that high identifiers both give more help, are less stressed, and are more hesitant to press the shock button than low identifiers. We conclude that these findings constitute a refutation of the 'agentic state' approach to obedience. Instead, we discuss implications for the alternative approaches such as 'engaged followership' which suggests that obedience is a function of relative identification with the science and with the victim in the study. Finally, we discuss the value of Virtual Reality as a technique for investigating hard-to-study psychological phenomena

Effective Rheology of Bubbles Moving in a Capillary Tube

We calculate the average volumetric flux versus pressure drop of bubbles moving in a single capillary tube with varying diameter, finding a square-root relation from mapping the flow equations onto that of a driven overdamped pendulum. The calculation is based on a derivation of the equation of motion of a bubble train from considering the capillary forces and the entropy production associated with the viscous flow. We also calculate the configurational probability of the positions of the bubbles.Comment: 4 pages, 1 figur

The study of atmospheric ice-nucleating particles via microfluidically generated droplets

Ice-nucleating particles (INPs) play a significant role in the climate and hydrological cycle by triggering ice formation in supercooled clouds, thereby causing precipitation and affecting cloud lifetimes and their radiative properties. However, despite their importance, INP often comprise only 1 in 10³–10⁶ ambient particles, making it difficult to ascertain and predict their type, source, and concentration. The typical techniques for quantifying INP concentrations tend to be highly labour-intensive, suffer from poor time resolution, or are limited in sensitivity to low concentrations. Here, we present the application of microfluidic devices to the study of atmospheric INPs via the simple and rapid production of monodisperse droplets and their subsequent freezing on a cold stage. This device offers the potential for the testing of INP concentrations in aqueous samples with high sensitivity and high counting statistics. Various INPs were tested for validation of the platform, including mineral dust and biological species, with results compared to literature values. We also describe a methodology for sampling atmospheric aerosol in a manner that minimises sampling biases and which is compatible with the microfluidic device. We present results for INP concentrations in air sampled during two field campaigns: (1) from a rural location in the UK and (2) during the UK’s annual Bonfire Night festival. These initial results will provide a route for deployment of the microfluidic platform for the study and quantification of INPs in upcoming field campaigns around the globe, while providing a benchmark for future lab-on-a-chip-based INP studies

Identity talk of aspirational ethical leaders

This study investigates how business leaders dynamically narrate their aspirational ethical leadership identities. In doing so, it furthers understanding of ethical leadership as a process situated in time and place. The analysis focuses on the discursive strategies used to narrate identity and ethics by ethnic Chinese business leaders in Indonesia after their conversion to Pentecostal-charismatic Christianity. By exploring the use of metaphor, our study shows how these business leaders discursively deconstruct their 'old' identities and construct their 'new' aspirational identities as ethical leaders. This leads to the following contributions. First, we show that ethical leadership is constructed in identity talk as the business leaders actively narrate aspirational identities. Second, the identity narratives of the business leaders suggest that ethical leadership is a context-bound and situated claim vis-à-vis unethical practice. Third, we propose a conceptual template, identifying processes of realisation and inspiration followed by significant shifts in understanding, for the study of aspirational ethical leadership. © 2012 Springer Science+Business Media B.V