This dissertation examines the psychology of moral judgment and its implications for normative ethics and metaethics. Recent empirical findings in moral psychology, such as the impact of emotions, intuitions, and situational factors on moral judgments, have sparked a debate about whether ordinary moral judgments are systematically error-prone. Some philosophers, such as Peter Singer and Joshua Greene, argue that these findings challenge the reliability of moral intuitions and support more "reasoned", consequentialist approaches over deontological ones. The first part of the dissertation (...) reviews these provocative findings and the philosophical reactions to them, which often invoke the notion of 'moral relevance' - the idea that some factors shaping moral judgments are morally irrelevant. The second part develops a psychological account of moral relevance, drawing on theories of the moral domain, the role of emotions, and models of moral cognition. This account reveals the complex interplay of intuitive and reasoned processes in generating impressions of moral relevance. The final part reevaluates the philosophical discussions in light of this psychological understanding. It contends that the evolutionary background of moral intuitions does not necessarily render them inadequate, and that both deontological and consequentialist judgments likely depend on evolved intuitions to a significant degree. Furthermore, the tendency to dismiss certain influences on moral judgment as irrelevant can itself be explained psychologically. Considering the psychological account presented, mind-independent accounts of morality become less plausible. The dissertation concludes that while empirical moral psychology reveals important constraints on normative theorizing, it does not decisively favor consequentialism over deontology. To assess the significance of empirical-scientific findings for ethics, a nuanced understanding of the origins of moral judgments is nevertheless indispensable. (shrink)

Moral judgements are based on automatic processes. Moral judgements are based on reason. In this paper, I argue that both of these claims are true, and show how they can be reconciled. Neither the automaticity of moral judgement nor the post hoc nature of conscious moral reasoning pose a threat to rationalist models of moral cognition. The relation moral reasoning bears to our moral judgements is not primarily mediated by episodes of conscious reasoning, but by the acquisition, formation and maintenance (...) – in short: education – of our moral intuitions. (shrink)

Moral judgements are based on automatic processes. Moral judgements are based on reason. In this paper, I argue that both of these claims are true, and show how they can be reconciled. Neither the automaticity of moral judgement nor the post hoc nature of conscious moral reasoning pose a threat to rationalist models of moral cognition. The relation moral reasoning bears to our moral judgements is not primarily mediated by episodes of conscious reasoning, but by the acquisition, formation and maintenance (...) ? in short: education ? of our moral intuitions. (shrink)

The moral psychologist Joshua Greene has proposed a number of arguments for the normative significance of empirical research and for the unreliability of deontological intuitions. For these arguments, much hinges on the combination of various components of Greene's research – namely the dual-process theory of moral judgement, ‘personalness’ as a factor in moral decision-making, and his functional understanding of deontology and consequentialism. Incorporating these components, I reconstruct three distinct arguments and show that the Personalness Argument for the claim that empirical (...) research can advance normative ethics and the Combined Argument against deontology are both sound and interesting in themselves. They do not, however, cast doubt on traditional deontology or reserve a specific role for neuroscience. The Indirect Route argument overcomes some of the other arguments’ limitations. It is, however, invalid. I conclude by pointing out the broader philosophical relevance of Greene's arguments as shedding light on second-order morality. (shrink)

Robotization is an increasingly pervasive feature of our lives. Robots with high degrees of autonomy may cause harm, yet in sufciently complex systems neither the robots nor the human developers may be candidates for moral blame. John Danaher has recently argued that this may lead to a retribution gap, where the human desire for retribution faces a lack of appropriate subjects for retributive blame. The potential social and moral implications of a retribution gap are considerable. I argue that the retributive (...) intuitions that feed into retribution gaps are best understood as deontological intuitions. I apply a debunking argument for deontological intuitions in order to show that retributive intuitions cannot be used to justify retributive punishment in cases of robot harm without clear candidates for blame. The fundamental moral question thus becomes what we ought to do with these retributive intuitions, given that they do not justify retribution. I draw a parallel from recent work on implicit biases to make a case for taking moral responsibility for retributive intuitions. In the same way that we can exert some form of control over our unwanted implicit biases, we can and should do so for unjustifed retributive intuitions in cases of robot harm. (shrink)

Debunking arguments are arguments that seek to undermine a belief or doctrine by exposing its causal origins. Two prominent proponents of such arguments are the utilitarians Joshua Greene and Peter Singer. They draw on evidence from moral psychology, neuroscience, and evolutionary theory in an effort to show that there is something wrong with how deontological judgments are typically formed and with where our deontological intuitions come from. They offer debunking explanations of our emotion-driven deontological intuitions and dismiss complex deontological theories (...) as products of confabulatory post hoc rationalization. Through my discussion of Greene and Singer’s empirically informed debunking of deontology, I introduce the distinction between two different types of debunking arguments. The first type of debunking argument operates through regular undercutting defeat, whereas the second type relies on higher-order evidence. I argue that the latter type of debunking argument, of which the argument from confabulation is an example, is objectionably sloppy and therefore inadmissible in academic discussion. (shrink)

Studies suggest that people's moral intuitions are sensitive to morally irrelevant factors, such as personal force, spatial distance, ethnicity or nationality. Findings of this sort have been used to construct debunking arguments. The most prominent champion of this approach is Joshua Greene, who has attempted to undermine deontology by showing that deontological intuitions are triggered by morally irrelevant factors. This article offers a critical analysis of such empirically informed debunking arguments from moral irrelevance, and of Greene’s effort to undermine deontology. (...) One problem with arguments from moral irrelevance concerns the hierarchy between the targeted case-specific intuitions and the more general intuitions about which factors are morally (ir)relevant. If we assume that general intuitions always take precedence over case-specific intuitions, arguments from moral irrelevance become dialectically useless. By contrast, if we assume that both case-specific and general intuitions should be taken seriously, particularly sweeping debunking projects, such as Greene’s, are unlikely to go through. Another problem concerns the experimental aspect of arguments from moral irrelevance. Empirically informed arguments from moral irrelevance have been presented as examples of how empirical moral psychology can advance moral theory. But arguments from moral irrelevance can also be constructed from the armchair. And basing these arguments on empirical findings about laypeople’s intuitions is even counterproductive. (shrink)

Joshua Greene and his colleagues have proposed a dual-process theory of moral decision-making to account for the effects of emotional responses on our judgments about moral dilemmas that ask us to contemplate causing direct personal harm. Early formulations of the theory contrast emotional and cognitive decision-making, saying that each is the product of a separable neural system. Later formulations emphasize that emotions are also involved in cognitive processing. I argue that, given the acknowledgement that emotions inform cognitive decision-making, a single-process (...) theory can explain all of the data that have been cited as evidence for Greene’s theory. The emotional response to the thought of causing harm may differ in degree, but not in kind, from other emotions influencing moral decision-making. (shrink)

According to the dual-process account of moral judgment, deontological and utilitarian judgments stem from two different cognitive systems. Deontological judgments are effortless, intuitive and emotion-driven, whereas utilitarian judgments are effortful, reasoned and dispassionate. The most notable evidence for dual-process theory comes from neuroimaging studies by Joshua Greene and colleagues. Greene has suggested that these empirical findings undermine deontology and support utilitarianism. It has been pointed out, however, that the most promising interpretation of his argument does not make use of the (...) empirical findings. In this paper, I engage with recent attempts by Greene to vindicate the moral significance of dual-process theory and the supporting neuroscientific findings. I consider their potential moral significance with regard to three aspects of Greene’s case against deontology: the argument from morally irrelevant factors, the functionalist argument and the argument from confabulation. I conclude that Greene fails to demonstrate how neuroscience and dual-process theory in general can advance moral theorizing. (shrink)