Pay-as-you-drive vehicle insurance as a tool to reduce crash risk: Results so far and further potential

In this paper, we provide an extensive summary of a field experiment we have recently conducted on the behavioural effects of pay-as-you-drive (PAYD) vehicle insurance (Bolderdijk et al., 2011a). We start with a review of the rationale for PAYD schemes from a behavioural science perspective. Next, we describe the design of our study, and discuss and elaborate on the main empirical findings. Based on this, we present practical guidelines for policy makers and insurance companies aiming to introduce PAYD schemes as a tool to reduce crash risk, improve traffic safety, and reduce the negative environmental impacts of car use

Activation and Inactivation of Homomeric KvLQT1 Potassium Channels

AbstractThe voltage-gated potassium channel protein KvLQT1 (Wang et al., 1996. Nature Genet. 12:17–23) is believed to underlie the delayed rectifier potassium current of cardiac muscle together with the small membrane protein minK (also named IsK) as an essential auxiliary subunit (Barhanin et al., 1996. Nature. 384:78–80; Sanguinetti et al., 1996. Nature. 384:80–83). Using the Xenopus oocyte expression system, we analyzed in detail the gating characteristics of homomeric KvLQT1 channels and of heteromeric KvLQT1/minK channels using two-electrode voltage-clamp recordings. Activation of homomeric KvLQT1 at positive voltages is accompanied by an inactivation process that is revealed by a transient increase in conductance after membrane repolarization to negative values. We studied the recovery from inactivation and the deactivation of the channels during tail repolarizations at −120mV after conditioning pulses of variable amplitude and duration. Most measurements were made in high extracellular potassium to increase the size of inward tail currents. However, experiments in normal low-potassium solutions showed that, in contrast to classical C-type inactivation, the inactivation of KvLQT1 is independent of extracellular potassium. At +40mV inactivation develops with a delay of 100ms. At the same potential, the activation estimated from the amplitude of the late exponential decay of the tail currents follows a less sigmoidal time course, with a late time constant of 300ms. Inactivation of KvLQT1 is not complete, even at the most positive voltages. The delayed, voltage-dependent onset and the incompleteness of inactivation suggest a sequential gating scheme containing at least two open states and ending with an inactivating step that is voltage independent. In coexpression experiments of KvLQT1 with minK, inactivation seems to be largely absent, although biphasic tails are also observed that could be related to similar phenomena

Words speak louder than actions

De meeste mensen zeggen in vragenlijsten dat ze duurzaamheid belangrijk vinden. Ondertussen blijven ze vliegen en kopen ze kleding die ze niet dragen. Men oordeelt daar vaak over met: “Talk is cheap”, een cynische interpretatie van de zogenaamde ‘value-action gap’. Tijdens zijn oratie betoogt Jan Willem Bolderdijk dat deze interpretatie niet alleen onjuist is, maar ook als hardnekkig 'frame' fungeert dat systeemverandering tegenwerkt. Wat mensen in vragenlijsten of online uiten, zegt namelijk vaak méér over hun daadwerkelijke drijfveren dan hun (niet-duurzame) acties. Bovendien zorgt de fixatie op (niet-duurzame) daden ervoor dat we de kracht van woorden vergeten: juist in het collectief bespreekbaar maken van onze duurzame intenties én ongemakken schuilt kracht tot mobilisatie en draagvlak voor systeemverandering. Dus: gedragswetenschappers, onderzoek ook de woorden die mensen gebruiken in de echte wereld. Bezorgde burgers, collega’s, docenten, preach what you already practice. Bedrijven en overheden, staar je niet blind op wat mensen momenteel doen, maar luister naar wat mensen te zeggen hebben

An exploratory study into the effects of extraordinary nature on emotions, mood, and prosociality

Environmental psychology research has demonstrated that exposure to mundane natural environments can be psychologically beneficial, and can, for instance, improve individuals' mood and concentration. However, little research has yet examined the psychological benefits of extraordinary, awe-evoking kinds of nature, such as spectacular mountain scenes or impressive waterfalls. In this study, we aimed to address the underrepresentation of such extraordinary nature in research on human—nature interactions. Specifically, we examined whether watching a picture slideshow of awesome as opposed to mundane nature differentially affected individuals' emotions, mood, social value orientation (SVO), and their willingness to donate something to others. Our analyses revealed that, compared to mundane nature and a neutral condition, watching awesome natural scenes and phenomena had some unique and pronounced emotional effects (e.g., feeling small and humble), triggered the most mood improvement, and led to a more prosocial SVO. We found that participants' willingness to donate did not differ significantly for any of the conditions

Minority influence in climate change mitigation

While the majority of people care about environmental quality, they keep engaging in carbon-intensive practices that exacerbate climate change. Can we expect humans to collectively change by themselves, from the bottom up? Social change is often initiated by minorities – individuals who challenge the status quo. The dominant literature paints a rather pessimistic picture about the ability of minorities to instigate change in the environmental domain: environmental activists, vegans, and other minority members often elicit social sanctions, thereby ironically reinforcing the majority’s commitment to current, environmentally harmful norms. Recent findings, however, point towards more optimism: pro-environmental minorities can pave the way towards ‘tipping points’ and spontaneous social change. Policymakers can speed up this process by offering top-down support for minorities – by giving them ‘voice’

“How do you know someone's vegan?” They won't always tell you. An empirical test of the do-gooder's dilemma

A growing number of people (privately) endorse the benefits associated with adopting a meat-free diet. Yet, the societal transition to a more plant-based diet is taking place rather slowly. Why do people's private meat-free preferences fail to materialize in their daily food choices? One potential explanation is that vegetarians and vegans, at this time still a minority group, are worried about eliciting stigma and thus may not feel comfortable expressing their meat-free preferences during social interactions with meat-eaters. Their self-silencing could reinforce the notion that adopting a meat-free diet is nothing more than a niche phenomenon, and in turn discourage others from eliminating meat from their diet as well, thus perpetuating the non-vegetarian norm. Adapting the classic conformity paradigm by Asch, we found that vegetarian and vegan participants were hesitant to express their meat-free preferences. Vegan and vegetarian participants avoided signing a petition that promoted veg*an food options after a majority of confederates had declined to do so. When the experimenter endorsed veg*an food options, however, participants went against the majority, and did sign the petition. Together, these findings point to a pivotal role for exemplars and institutions: by signaling that there are allies who endorse a meat-free diet, they may liberate vegetarians and vegans to publicly express their deviant, meat-free preferences, and thus speed up wider societal change