Competition and moral behavior: A meta-analysis of forty-five crowd-sourced experimental designs.

Does competition affect moral behavior? This fundamental question has been debated among leading scholars for centuries, and more recently, it has been tested in experimental studies yielding a body of rather inconclusive empirical evidence. A potential source of ambivalent empirical results on the same hypothesis is design heterogeneity-variation in true effect sizes across various reasonable experimental research protocols. To provide further evidence on whether competition affects moral behavior and to examine whether the generalizability of a single experimental study is jeopardized by design heterogeneity, we invited independent research teams to contribute experimental designs to a crowd-sourced project. In a large-scale online data collection, 18,123 experimental participants were randomly allocated to 45 randomly selected experimental designs out of 95 submitted designs. We find a small adverse effect of competition on moral behavior in a meta-analysis of the pooled data. The crowd-sourced design of our study allows for a clean identification and estimation of the variation in effect sizes above and beyond what could be expected due to sampling variance. We find substantial design heterogeneity-estimated to be about 1.6 times as large as the average standard error of effect size estimates of the 45 research designs-indicating that the informativeness and generalizability of results based on a single experimental design are limited. Drawing strong conclusions about the underlying hypotheses in the presence of substantive design heterogeneity requires moving toward much larger data collections on various experimental designs testing the same hypothesis.

"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.

Rules or consequences? The role of ethical mind-sets in moral dynamics.

Recent research on the dynamics of moral behavior has documented two contrasting phenomena-moral consistency and moral balancing. Moral balancing refers to the phenomenon whereby behaving ethically or unethically decreases the likelihood of engaging in the same type of behavior again later. Moral consistency describes the opposite pattern-engaging in ethical or unethical behavior increases the likelihood of engaging in the same type of behavior later on. The three studies reported here supported the hypothesis that individuals' ethical mind-set (i.e., outcome-based vs. rule-based) moderates the impact of an initial ethical or unethical act on the likelihood of behaving ethically on a subsequent occasion. More specifically, an outcome-based mind-set facilitated moral balancing, and a rule-based mind-set facilitated moral consistency.

When Do Morally Motivated Innovators Elicit Inspiration Instead of Irritation?

Innovators (i.e., consumers who are the first to adopt an innovation) are pivotal for the societal diffusion of sustainable innovations. But when are innovators most influential? Recent work suggests that morally motivated innovators (i.e., consumers who adopt an innovation out of concern for the welfare of others) can make fellow consumers who have not yet adopted that innovation feel morally inadequate. As a self-defense mechanism, those fellow consumers might dismiss these innovators and their choices. As a result, ironically, morally motivated innovators might discourage others to adopt sustainable innovations. In an experimental study, we replicate this pattern, but also show that moral innovators can elicit a more positive response as well. Specifically, our results offer initial evidence that morally motivated innovators may be more inspiring than self-interested innovators, provided that their actions do not directly pose a threat to the moral self-concept of observers. In sum, our research sheds empirical light on the conditions under which innovators are likely to facilitate, rather than slow down the transition to a more sustainable society.

Status-Relevant Experiences and Conspicuous Consumption - the Moderating Role of Prenatal Androgen Exposure.

In this paper we study consumers' interest in acquiring and displaying expensive luxury products. Based on recent insights in consumer psychology, which build on developments in evolutionary biology, we consider luxury products as "costly signals": wasteful and costly goods, whose purpose is to communicate one's biological fitness, and social status, to others. In line with previous research, we show that experiences that trigger mate attraction goals (Study 1: Exposure to others in bathing outfit) or status display goals (Study 2: Experiencing a vicarious victory of one's favorite sports team) can increase people's interest in luxury products. However, we demonstrate that some individuals are predictably more responsive to those experiences than others. We used a physiological measure (the proportion of the length of the index finger and ring finger of the right hand, 2D:4D) as a proxy for individual differences in exposure to prenatal androgens (i.e., testosterone). This measure has been related to dominant and competitive behavior later in life. We predict and find that individuals with a low 2D:4D (i.e., high exposure to prenatal androgens) were more responsive to the status-relevant experiences: they became more interested in luxury goods after these experiences. This was not the case for high 2D:4D individuals.

Are social value orientations expressed automatically? Decision making in the dictator game.

Drawing on the social intuitionist model, the authors studied the hypothesis that social value orientations are expressed automatically in behavior. They compared spontaneous and more deliberated decisions in the dictator game and confirmed that social values determine behavior when responses are based on the automatic system. By means of both mediation and experimental analyses, the authors further demonstrate that the automatic expression of social value orientations is mediated by perceptions of interpersonal closeness. A reasoning process can subsequently override these automatic responses and disconnect decisions from perceptions of interpersonal closeness. This results in lower levels of other-regarding behavior, at least for prosocials.