This paper purports to provide a fresh cashing out of Debasing Scepticism: the type of Scepticism put on the map in a recent article by Jonathan Schaffer, with a view to demonstrating that the Debasing Sceptic’s argument is not so easily dismissed as many of Schaffer’s commentators have thought. After defending the very possibility of the Debasing Sceptic’s favoured sceptical scenario, I lay out a framework for thinking of the agent’s power to hold their beliefs in the light of reasons (...) which I argue has initial plausibility. I then attempt to show that with this framework in tow, the Debasing Sceptic has an argument for their sceptical conclusion available to them which Schaffer’s commentators have failed to undermine, and which is independently interesting. (shrink)

This review provides an overview of Eva Schmidt's impressively thorough and detailed book on the Conceptualist/Nonconceptualist debate in the philosophy of perception, and briefly sketches two objections to Schmidt. First, I suggest that a certain dilemma for the Conceptualist Schmidt raises in the context of her discussion of the fineness of grain argument is surmountable. Second, I question whether Schmidt's response to the epistemological motivation for Conceptualism is sound.

The primary focus of Susanne Mantel’s excellent 'Determined by Reasons' is to develop a distinctive abilities-based account of acting in response to normative reasons, one which is clearly modelled on extant ability-theoretic accounts of knowledge. This review sketches Mantel’s account and raises a worry: that the account fails to characterise the sort of abilities constitutively involved in responding to reasons because it allows that agents can act for the reason that p even if their belief that p is not accessible (...) to conscious reasoning. (shrink)

It is uncontroversial that something goes wrong with the blaming practices of hypocrites. However, it is more difficult to pinpoint exactly what is objectionable about their blaming practices. I contend that, just as epistemologists have recently done with blame, we can constructively treat hypocrisy as admitting of an epistemic species. This paper has two objectives: first, to identify the epistemic fault in epistemically hypocritical blame, and second, to explain why epistemically hypocritical blamers lose their standing to epistemically blame. I tackle (...) the first problem by appealing to an epistemic norm of consistency. I address the second by arguing that the epistemically hypocritical blamer commits to an opting-out of the set of shared epistemic standards that importantly underlies our standing to epistemically blame. I argue further that being epistemically hypocritical undermines a blamer’s standing even to judge epistemically blameworthy. (shrink)

"We wish this volume to be a sure companion to the study of free will, broadly construed to include action theory, moral and legal responsibility, and cohort studies feathering off into adjacent fields in the liberal arts and sciences. In addition to general coverage of the discipline, this volume attempts a more challenging and complementary accompaniment to many familiar narratives about free will. In order to map out some directions such accompaniment will take, in this introduction we anchor the thirty (...) contributions to this volume in some common history from which they arise, and attempt to indicate where future work in free will and moral responsibility will–and has already begun to–depart from that history." -Excerpt from Introduction. ... ... To read full introduction, (1) download attached file or (2) follow wiley_dot_com link below, click "Read An Excerpt", then click :Excerpt 3:(pdf)". (shrink)

In this chapter, we compare Kant and James’ accounts of freedom. Despite both thinkers’ rejecting compatibilism for the sake of practical reason, there are two striking differences in their stances. The first concerns whether or not freedom requires the possibility of an open future. James holds that morality hinges on the real possibility that the future can be affected by our actions. Kant, on the other hand, seems to maintain that we can still be free in the crucial sense, even (...) if none of our actions can have any effect on the future. The second difference between them is related, and concerns the location of freedom. Kant views experience as determined by natural necessity, and locates freedom outside of it, in things-in-themselves. James, on the other hand, has a richer conception of experience than Kant, and holds that we can locate our freedom within experience alone. In the end, we contend that James has a better account of how freedom relates to our experience, but this comes at a cost. For while Kant's account struggles with the relationship between freedom and experience, it has the advantage of insulating our freedom from potential empirical challenges. (shrink)

This chapter draws an analogy between computing mechanisms and autopoietic systems, focusing on the non-representational status of both kinds of system (computational and autopoietic). It will be argued that the role played by input and output components in a computing mechanism closely resembles the relationship between an autopoietic system and its environment, and in this sense differs from the classical understanding of inputs and outputs. The analogy helps to make sense of why we should think of computing mechanisms as non-representational, (...) and might also facilitate reconciliation between computational and autopoietic/enactive approaches to the study of cognition. (shrink)

Whilst much has been said about the implications of predictive processing for our scientific understanding of cognition, there has been comparatively little discussion of how this new paradigm fits with our everyday understanding of the mind, i.e. folk psychology. This paper aims to assess the relationship between folk psychology and predictive processing, which will first require making a distinction between two ways of understanding folk psychology: as propositional attitude psychology and as a broader folk psychological discourse. It will be argued (...) that folk psychology in this broader sense is compatible with predictive processing, despite the fact that there is an apparent incompatibility between predictive processing and a literalist interpretation of propositional attitude psychology. The distinction between these two kinds of folk psychology allows us to accept that our scientific usage of folk concepts requires revision, whilst rejecting the suggestion that we should eliminate folk psychology entirely. (shrink)

This is a paper about the methodology of normative ethics. I claim that much work in normative ethics can be interpreted as modelling, the form of inquiry familiar from science, involving idealised representations. I begin with the anti-theory debate in ethics, and note that the debate utilises the vocabulary of scientific theories without recognising the role models play in science. I characterise modelling, and show that work with these characteristics is common in ethics. This establishes the plausibility of my interpretation. (...) Taking methodological inspiration from modelling in science gives us new tools for managing idealisations, and a new perspective on pluralism. I demonstrate why this interpretation is a fruitful way of interpreting ethics, by looking at three case studies. First, I return to the anti-theory debate and argue that modelling opens up a new middle ground. Second, I argue that a modelling lens offers a new way of understanding impossibility theorems in population ethics, and their bearing on ethics as a whole. Finally, I show how viewing our work as modelling can be deployed in debates within ethics, using the debate over prioritarianism as an example. I close with further methodological suggestions for those who choose to see themselves as modellers. I discuss the role of counterexamples, our responses to moral disagreement, and the training of new ethicists. (shrink)

I argue that normative formal epistemology (NFE) is best understood as modelling, in the sense that this is the reconstruction of its methodology on which NFE is doing best. I focus on Bayesianism and show that it has the characteristics of modelling. But modelling is a scientific enterprise, while NFE is normative. I thus develop an account of normative models on which they are idealised representations put to normative purposes. Normative assumptions, such as the transitivity of comparative credence, are characterised (...) as modelling idealisations motivated normatively. I then survey the landscape of methodological options: what might formal epistemologists be up to? I argue the choice is essentially binary: modelling or theorising. If NFE is theorising it is doing very poorly: generating false claims with no clear methodology for separating out what is to be taken seriously. Modelling, by contrast, is a successful methodology precisely suited to the management of useful falsehoods. Regarding NFE as modelling is not costless, however. First, our normative inferences are less direct and are muddied by the presence of descriptive idealisations. Second, our models are purpose-specific and limited in their scope. I close with suggestions for how to adapt our practice. (shrink)

While we agree in broad strokes with the characterisation of rationalization as a “useful fiction,” we think that Fiery Cushman's claim remains ambiguous in two crucial respects: the reality of beliefs and desires, that is, the fictional status of folk-psychological entities and the degree to which they should be understood as useful. Our aim is to clarify both points and explicate the rationale of rationalization.

In this paper, we draw attention to several important tensions between Kant’s account of moral education and his commitment to transcendental idealism. Our main claim is that, in locating freedom outside of space and time, transcendental idealism makes it difficult for Kant to both provide an explanation of how moral education occurs, but also to confirm that his own account actually works. Having laid out these problems, we then offer a response on Kant’s behalf. We argue that, while it might (...) look like Kant has to abandon his commitment to either moral education or transcendental idealism, there is a way in which he can maintain both. (shrink)

Roderich Tumulka’s GRWf theory offers a simple, realist and relativistic solution to the measurement problem of quantum mechanics. It is achieved by the introduction of a stochastic dynamical collapse of the wavefunction. An issue with dynamical collapse theories is that they involve an amendment to the Schrodinger equation; amending the dynamics of such a tried and tested theory is seen by some as problematic. This paper proposes an alteration to GRWf that avoids the need to amend the Schrodinger equation via (...) what might be seen as a primary set of solutions to the Schrodinger equation that satisfy a normalisation condition over space and time. The traditional Born-normalised solutions are shown to be conditionalisations of these primary solutions. (shrink)

In this paper we will demonstrate that a computational system can meet the criteria for autonomy laid down by classical enactivism. The two criteria that we will focus on are operational closure and structural determinism, and we will show that both can be applied to a basic example of a physically instantiated Turing machine. We will also address the question of precariousness, and briefly suggest that a precarious Turing machine could be designed. Our aim in this paper is to challenge (...) the assumption that computational systems are necessarily heteronomous systems, to try and motivate in enactivism a more nuanced and less rigid conception of computational systems, and to demonstrate to computational theorists that they might find some interesting material within the enactivist tradition, despite its historical hostility towards computationalism. (shrink)

When an agent learns of an expert's credence in a proposition about which they are an expert, the agent should defer to the expert and adopt that credence as their own. This is a popular thought about how agents ought to respond to (ideal) experts. In a Bayesian framework, it is often modelled by endowing the agent with a set of priors that achieves this result. But this model faces a number of challenges, especially when applied to non-ideal agents (who (...) nevertheless interact with ideal experts). I outline these problems, and use them as desiderata for the development of a new model. Taking inspiration from Richard Jeffrey's development of Jeffrey conditioning, I develop a model in which expert reports are taken as exogenous constraints on the agent's posterior probabilities. I show how this model can handle a much wider class of expert reports (for example reports of conditional probabilities), and can be naturally extended to cover propositions for which the agent has no prior. (shrink)

Freedom lies at the heart of Kant’s philosophy. Three recent edited collections explore this key idea in different ways, alongside other related concep...

Emmanuel Levinas’s work seemingly places a great emphasis on language leading some commentators towards a Kantian reading of him where moral consideration would be based on the moral patient’s capacity for reason with language functioning as a proxy for this. Although this reading is possible, a closer look at Levinas’s descriptions of language reveal that its defining characteristic is not reason but the capacity to express beyond any thematized contents we would give to the Other. This expressivity (which Levinas calls (...) face) would confront me with their singularity, infinity, and interiority tying me to them in a relation of responsibility. And the “content” of such an expression is a vulnerability and exposure tied to their mortality which continually entreats me though I cannot take it away. It is by means of this bare expression of an exposure to death as the core of language that it will become possible for non-human mortal beings to have what Levinas calls language. This possibility, although not explicitly addressed by Levinas, is at least left open by his account of Bobby the dog as well as his agnosticism over a snake’s face. (shrink)

Prudential hedonism is a school of thought in the philosophy of welfare that says that only pleasure is good for us in itself and only pain is bad for us in itself. This dissertation concerns an especially austere form of prudential hedonism: basic prudential hedonism (BPH). BPH claims that all pleasure is good for us in itself, and all pain is bad for us in itself, without exception; that all pleasures feel fundamentally alike, as do all pains; and that the (...) amount of welfare in a person’s life can (in principle) be calculated just by adding up the amount of pleasure it contains and subtracting the amount of pain. The dissertation presents a positive argument for the claim that pleasures and pains are defined by common phenomenal properties, defends BPH against a battery of objections, and outlines an argument for accepting BPH on the grounds that it is simpler than competing views. (shrink)

This paper lays out two recent accounts of Hegel’s practical philosophy in order to present a challenge. According to Robert Stern and Mark Alznauer, Hegel attempts to ground our ethical practices in ontological norms. I argue that we cannot ground our ethical practices in this way. However, I also contend that Stern’s and Alznauer’s conception of reality as both conceptual and normative can still play a useful role in practical philosophy, namely, to help defuse a sceptical worry about a threat (...) to ethics. (shrink)

Indispensability arguments are used as a way of working out what there is: our best science tells us what things there are. Some philosophers think that indispensability arguments can be used to show that we should be committed to the existence of mathematical objects (numbers, functions, sets). Do indispensability arguments also deliver conclusions about the modal properties of these mathematical entities? Colyvan (in Leng, Paseau, Potter (eds) Mathematical knowledge, OUP, Oxford, 109-122, 2007) and Hartry Field (Realism, mathematics and modality, Blackwell, (...) Oxford, 1989) each suggest that a consequence of the empirical methodology of indispensability arguments is that the resulting mathematical objects can only be said to exist (or not exist) contingently. Kristie Miller has argued that this line of thought doesn’t work (Miller in Erkenntnis, 77 (3), 335-359, 2012). Miller argues that indispensability arguments are in direct tension with contingentism about mathematical objects, and that they cannot tell us about the modal status of mathematical objects. I argue that Miller’s argument is crucially imprecise, and that the best way of making it clearer no longer shows that the indispensability strategy collapses or is unstable if it delivers contingentist conclusions about what there is. (shrink)

Evidential holism begins with something like the claim that “it is only jointly as a theory that scientific statements imply their observable consequences.” This is the holistic claim that Elliott Sober tells us is an “unexceptional observation”. But variations on this “unexceptional” claim feature as a premise in a series of controversial arguments for radical conclusions, such as that there is no analytic or synthetic distinction that the meaning of a sentence cannot be understood without understanding the whole language of (...) which it is a part and that all knowledge is empirical knowledge. This paper is a survey of what evidential holism is, how plausible it is, and what consequences it has. Section 1 will distinguish a range of different holistic claims, Sections 2 and 3 explore how well motivated they are and how they relate to one another, and Section 4 returns to the arguments listed above and uses the distinctions from the previous sections to identify holism's role in each case. (shrink)

In our paper, we distinguish between two forms of memory knowledge: experiential memory knowledge and stored memory knowledge. We argue that, mutatis mutandis, the case that Pritchard makes for epistemological disjunctivism regarding perceptual knowledge can be made for epistemological disjunctivism regarding experiential memory knowledge. At the same time, we argue against a disjunctivist account of stored memory knowledge.

Political advertising is changing. This chapter considers some of the implications of this for the democratic process. I begin with recent reports of online political advertising. From this, two related concerns emerge. The first is that online political advertisements sometimes occur in the dark, and the second is that they can involve sending different messages to different groups. I consider these issues in turn. This involves an extended discussion of the importance of publicity and discussion in democracy, and a comparison (...) between dog whistles and dark advertisements. Through this, I look to outline some of the ways in which online political advertisements can undermine the democratic process. (shrink)

Many fields (social choice, welfare economics, recommender systems) assume people express what benefits them via their 'revealed preferences'. Revealed preferences have well-documented problems when used this way, but are hard to displace in these fields because, as an information source, they are simple, universally applicable, robust, and high-resolution. In order to compete, other information sources (about participants' values, capabilities and functionings, etc) would need to match this. I present a conception of values as *attention policies resulting from constitutive judgements*, and (...) use it to build an alternative preference relation, Meaningful Choice, which retains many desirable features of revealed preference. (shrink)

This paper draws attention to two problems with Kant's claim that transcendental freedom is timeless. The problems are that this causes conceptual difficulties and fails to vindicate important parts of our moral practices. I then put forward three ways in which we can respond to these charges on Kant's behalf. The first is to defend Kant's claim that transcendental freedom occurs outside of time. The second is to reject this claim, but try to maintain transcendental idealism. And the third is (...) to reject both Kant's claim about the timelessness of freedom and also transcendental idealism itself. (shrink)

The Republic of Ireland is introducing major human rights-based reform to its mental health laws. This paper outlines the new legal landscape in which psychologists must operate against the backdrop of present day effects of Ireland’s dark legacy of institutionalisation. A rights-based approach aims to positively transform mental health service delivery and we advocate for person-centred treatments as the ‘new normal’. We summarise the recent advocacy work undertaken by the Psychological Society of Ireland’s Special Interest Group in Human Rights & (...) Psychology. Finally, we present an innovative best practice case promoting future rights-based delivery via the Socio-Ecological Model of Health – Kyrie Farm. Keywords: UNCRPD; Assisted Decision Making Act 2015 (ADMA) in the Rep. of Ireland; The Socio-Ecological Model of Health. (shrink)

This paper explores the political campaigning strategies of Lynton Crosby, and argues that they pose a threat to democracy. In doing so, I looks to shed light on Crosby’s tactics, but also to elucidate exactly what is anti-democratic about them. I argue that there are two worrying aspects to this. The first involves Crosby’s lack of respect for voters’ beliefs, interests and values, whereas the second concerns his propensity for avoiding debate.

Nussbaum’s theory of the emotions draws heavily on the Stoic account. In her theory, emotions are a kind of value judgment or thought. This is in stark contrast to the well-known proposal from William James, who took emotions to be bodily feelings. There are various motivations for taking emotions as judgments. One main reason is that emotions are intentional mental states. They are always about something, directed at particular objects or state of affairs. For example, fear seems to involve the (...) anticipation of danger. To grief for the passing of a loved one involves the thought that someone dear to us is now gone. In Upheavals of Thought and also in her Hochelaga Lecture, Nussbaum analyzed compassion as a set of judgments, including for example the judgment that someone is experiencing serious suffering, and that the person in question does not deserve the suffering. (shrink)

Kant worries that if we are not free, morality will be nothing more than a phantasm for us. In the final section of the Groundwork, he attempts secure our freedom, and with it, morality. Here is a simplified version of his argument: -/- 1. A rational will is a free will 2. A free will stands under the moral law 3. Therefore, a rational will stands under the moral law -/- In this paper, I attempt to defuse two prominent objections (...) to this argument. Commentators often worry that Kant has not managed to establish that we are rational beings with wills in the first place, and that he equivocates in his use of ‘free’ between premise 1 and 2. I argue that both of these objections can be overcome, and thus seek to offer some hope for Kant’s approach in Groundwork III. (shrink)

Pietroski (1993) offers a semantics for belief sentences that is supposed to address the problem of equivalence. This paper argues that his proposal fails to solve the problem.

The Psychological Society of Ireland’s (PSI) response to the call from the United Nations (UN) Committee on the Rights of the Child: Draft General Comment No. 26 Calls for comment on the draft general comment on children’s rights and the environment with a special focus on climate change III. ‘Specific rights of the Convention as they relate to the environment’, B. The right to the highest attainable standard of health (art. 24), 27. … children’s current and anticipated psychosocial, emotional and (...) mental health problems and suffering caused by environmental harm. The PSI wishes to express sincere thanks to the Society’s Special Interest Group in Human Rights and Psychology, particularly Dr Michelle Cowley-Cunningham, Dr Elaine Rogers, and Ms Alexis Carey, who coordinated the following response on behalf of the Society. 1. Environmental degradation, loss of biodiversity, and climate change impact children’s human rights and present a serious threat to future generations’ enjoyment of human rights. Distressingly, 1.7 million children lose their lives annually as a result of avoidable environmental impacts, while millions more are impacted by disease, displaced from their homes and miss out on receiving education1. The PSI Special Interest Group in Human Rights and Psychology (SIGHRP) is grateful to the Committee on the Rights of the Child for this opportunity to submit a stakeholder comment in advance of the drafting of the Draft General Comment No. 26. SIGHRP is appreciative of the work of the Committee in monitoring the implementation of the Convention on the Rights of the Child (UNCRC) and welcomes the Committee's stakeholder call for ideas to aid the development of policies, both domestically and internationally, to address critical climate change issues. Specifically, SIGHRP welcomes the opportunity to comment on the connection between child and adolescent mental health and human rights obligations, and advocates for policies and initiatives to address this issue in the context of climate change. (shrink)

Epistemic modals in consequent place of indicative conditionals give rise to apparent counterexamples to Modus Ponens and Modus Tollens. Familiar assumptions of fa- miliar truth conditional theories of modality facilitate a prima facie explanation—viz., that the target cases harbor epistemic modal equivocations. However, these explana- tions go too far. For they foster other predictions of equivocation in places where in fact there are no equivocations. It is argued here that the key to the solution is to drop the assumption that (...) modal claims are inherently relational (i.e., that they ex- press a logical relation between a prejacent and a premise-set) in favor of a view that treats them as inherently quantificational. In particular it is suggested that modals are mass noun descriptions of information. We demonstrate how this approach unlocks the equivocation problem. (shrink)

Bermúdez argues for rational framing effects in the form of quasi-cyclical preferences. This is supposed to refute the extensionality principle in standard decision theory. In response, I argue that it is better to analyze seemingly quasi-cyclical preferences as ceteris paribus preferences. Furthermore, if frames are included as objects of choice, we can acknowledge rational framing effects without rejecting extensionality.

A primary challenge from the relativist to the contextualist about epistemic modals is to explain eavesdropping data—i.e., why the eavesdropper is inclined to judge the speaker as having uttered an epistemic modal falsehood (when she is so inclined), even though the speaker’s utterance is true according to reasonable contextualist truth conditions. The issue turns in large part on the strength and shape of the data, both of which are in dispute. One complaint is that an eavesdropper’s truth value judgments fluctuate (...) with variations of non- epistemic fact (even after the relevant epistemic/information states are determined). The project here is to strengthen and reframe this complaint in a debate-neutral way, and to show how a sober contextualism can uniformly accommodate it and the standard eavesdropping data. Along the way we reject John Hawthorne’s danger-theoretic explanation of these subtleties. (shrink)

In response to the International Union of Psychological Sciences (IUPsyS) call for member organisations to ‘contribute ideas on the IUPsyS responses in crises and emergencies’, the Psychological Society of Ireland (PSI), through guidance from the PSI Special Interest Group in Human Rights and Psychology (SIGHRP),proposed a set of human rights-based recommendations to aid the IUPsyS policy mission for actions moving forward. This article speaks to the reasoning behind the rights-based framework, reprints the framework in full, and details the summary of (...) the stakeholder consultation. (shrink)

Physical Computation is the summation of Piccinini’s work on computation and mechanistic explanation over the past decade. It draws together material from papers published during that time, but also provides additional clarifications and restructuring that make this the definitive presentation of his mechanistic account of physical computation. This review will first give a brief summary of the account that Piccinini defends, followed by a chapter-by-chapter overview of the book, before finally discussing one aspect of the account in more critical detail.

Although ethics is an essential component of undergraduate medical education, research suggests current medical ethics curricula face considerable challenges in improving students’ ethical reasoning. This paper discusses these challenges and introduces a promising new mode of graduate and professional ethics instruction for overcoming them. We begin by describing common ethics curricula, focusing in particular on established problems with current approaches. Next, we describe a novel method of ethics education and assessment for medical students that we have devised, the Medical Ethics (...) Bowl. Finally, we suggest pedagogical advantages to MEBs when compared to other ethics curricula. (shrink)

The purpose of this paper is to provide a detailed technical protocol analysis of chess masters' evaluative expertise, paying particular attention to the analysis of the structure of their memory process in evaluating foreseen possibilities in games of dynamic equilibrium. The paper has two purposes. First, to publish a results chapter from my DPhil thesis (in revised journal article form) attending to the measurement of foresight in chess masters' evaluation process, testing alternative theories of cognitive expertise in the domain of (...) chess; and second to provide a subset of the technical graphical analysis that corresponds to that measurement to preserve this protocol analysis for access in the academic domain for future studies of expert memory and foresight (e.g., Ericsson & Simon, 1993). The step-by-step protocol analysis consists of: (i) an introduction to foresight cognition as hypothesis testing, (ii) a theoretical review in the domain of chess masters' expertise according to the theoretical frameworks in that field purporting hypotheses relevant to chess masters' evaluative skill processes, and (iii) summary tables and non-parametric statistical analysis corroborating chunking theory frameworks of expert cognition (e.g., DeGroot, 1965; Newell & Simon, 1972; Gobet, 1998; Gobet et al., 2004), and refuting the alternative search-evaluation models (e.g., Holding & Reynolds, 1982). Moreover, the journal article espouses the preservation of the traditional protocol analysis method core to the field of expert cognition (DeGroot, 1969; Kotov, 1971). The full protocol analysis can be found in monograph form here on my SSRN profile in ‘The role of falsification in hypothesis testing’. It takes the form of a specialist population study (e.g., detailed case study work; Luria, 1987). Thus the outline consists of a short introduction, a theoretical methodological review discussing protocol analysis methods for specialist population studies in cognition (with particular attention to the preservation of protocol analysis methods for chess studies in cognition and expert memory/ with a fresh angle on the foresight process), and the full set of protocol analyses with corresponding problem behaviour graphs. A subset of the main results has been published elsewhere (e.g., Cowley & Byrne, 2004; Cowley 2006), receiving scientific and scientific journalistic acclaim (e.g., Nature Online News 2004). (shrink)

DNA evidence is one of the most significant modern advances in the search for truth since the cross examination, but its format as a random-match-probability makes it difficult for people to assign an appropriate probative value (Koehler, 2001). While Frequentist theories propose that the presentation of the match as a frequency rather than a probability facilitates more accurate assessment (e.g., Slovic et al., 2000), Exemplar-Cueing Theory predicts that the subjective weight assigned may be affected by the frequency or probability format, (...) and how easily examples of the event, i.e., ‘exemplars’, are generated from linguistic cues that frame the match in light of further evidence (Koehler & Macchi, 2004). This paper presents two juror research studies to examine the difficulties that jurors have in assigning appropriate probative value to DNA evidence when contradictory evidence is presented. Study 1 showed that refuting evidence significantly reduced guilt judgments when exemplars were linguistically cued, even when the probability match and the refuting evidence had the same objective probative value. Moreover, qualitative reason for judgment responses revealed that interpreting refuting evidence was found to be complex and not necessarily reductive; refutation was found indicative of innocence or guilt depending on whether exemplars have been cued or not. Study 2 showed that the introduction of judges’ directions to linguistically cue exemplars, did not increase the impact of refuting evidence beyond its objective probative value, but less guilty verdicts were returned when jurors were instructed to consider all possible explanations of the evidence. The results are discussed in light of contradictory frequentist and exemplar-cueing theoretical positions, and their real-world consequences. (shrink)

Two main cognitive theories predict that people find refuting evidence that falsifies their theorising difficult, if not impossible to consider, even though such reasoning may be pivotal to grounding their everyday thoughts in reality (i.e., Poletiek, 1996; Klayman & Ha, 1987). In the classic 2-4-6 number sequence task devised by psychologists to test such reasoning skills in a simulated environment – people fail the test more often than not. In the 2-4-6 task participants try to discover what rule the number (...) triple 2-4-6 conforms to. The rule is ‘ascending numbers’, but it is tricky to discover this rule. Participants tend to generate hypotheses with the properties of the 2-4-6 triple, for example, ‘even numbers ascending in twos’. They must search for evidence to test whether their hypothesis is the rule. But experimental evidence has shown that they tend to generate confirming triples that they expect to be consistent with their hypothesis rather than inconsistent falsifying triples. Counter to the two main hypothesis testing theories this paper demonstrates that falsification is possible in five 2-4-6 task experiments when participants consider an Imaginary Participant’s hypothesis. Experiment 1 and 2 show that competition with an opponent hypothesis tester facilitates falsification. Experiments 3 to 5 show that the consideration of an alternative hypothesis helps this falsification of hypotheses lead to rule discovery. The implications of the results for theories of hypothesis testing and reasoning are discussed. (shrink)

In three empirical studies we examined how people reason about prior convictions in child abuse cases. We tested whether the disclosure of similar prior convictions prompts a mental representation or an additive probative value (Criminal Justice Act, 2003). Asymmetrical use of similar priors were observed in three studies. A pilot study showed that disclosure of a second prior did not contribute a weight equivalent to that of the first disclosure. Study 1 showed jurors did not see left-handed evidence (i.e. matching (...) victim bruising) as more indicative of guilt than right-handedness unless a prior conviction was present, and the presence of priors suppressed the generation of alternative possibilities indicative of innocence. Study 2 showed that disclosure did not decrease community ratings of reoffending propensity and dangerousness as much as a similar prior conviction increased them. We consider the results in the context of a new psychological theory of prior conviction bias and the consequences for the implementation of Section 100 of the Criminal Justice Act (2003). (shrink)

This notebook presents an introductory overview to the cognitive perspective on the psychology of human behaviour for social science students. Starting with an introduction to cognitive developmental theories of how babies reason, the overview then moves to discuss how children develop into better thinkers. Adult theories of cognition are subsequently outlined and critically evaluated. -/- A chronology of topics include: the rise of 'this thing we call cognition', Piaget's theory of cognitive development and its evaluation, problem space theory, and theories (...) of mental representation in adult thought examining, amongst other types of thinking and reasoning, deduction and induction and an evaluation of mental representation theories. (shrink)

Many theories in philosophy, law, and psychology, make no distinction in meaning between causing and enabling conditions. Yet, psychologically people readily make such distinctions each day. In this paper we report three experiments, showing that individuals distinguish between causes and enabling conditions in brief descriptions of wrongful outcomes. Respondents rate actions that bring about outcomes as causes, and actions that make possible the causal relation as enablers. Likewise, causers (as opposed to enablers) are rated as more responsible for the outcome, (...) as liable to longer prison sentences, and as liable to pay higher fines. Moreover, the more actors involved, the more blame volume there is psychologically to be apportioned between them. The implication is that theories and the law in practice, both criminal and civil, may dangerously mismatch the intuitions of those to whom they are supposed to apply. The findings are discussed in light of contemporary psychological theories of how people reason about cause. -/- The paper presents the extended findings supplementary to the conference paper: Frosch, C. A., Johnson-Laird, P. N., Cowley, M. (2007). Don’t blame me your Honor, I’m only the enabler. Proceedings of the Twenty–Ninth Annual Conference of the Cognitive Science Society, p. 1755, Mahweh, N. J: Erlbaum. Nashville, USA. *Main findings now cited in the Oxford Handbook of Causal Reasoning. (shrink)

Intended and merely foreseen consequences: The psychology of the ‘cause or allow’ offence. A short report for the Socio-Legal Community on ESRC Grant RES-000-22-3114.

According to the mental model theory, causes and enablers differ in meaning, and therefore in their logical consequences (Goldvarg & Johnson-Laird, 2001). They are consistent with different possibilities. Recent psychological studies have argued to the contrary, and suggested that linguistic cues guide this distinction (Kuhnmünch & Beller, 2005). The issue is important because neither British nor American law recognizes this distinction (e.g., Roberts & Zuckerman, 2004). Yet, in our view, it is central to human conceptions of causality. Hence, in two (...) experiments, we examined our participants’ ability to distinguish between causes and enablers in scenarios describing the actions of two agents and a subsequent outcome, e.g.: ‘Mary threw a lighted cigarette into a bush. Just as the cigarette was going out, Laura deliberately threw petrol on it. The resulting fire burnt down her neighbor’s house.’ Here Mary enabled the fire to occur, whereas Laura caused the fire to occur. (shrink)

Falsification may demarcate science from non-science as the rational way to test the truth of hypotheses. But experimental evidence from studies of reasoning shows that people often find falsification difficult. We suggest that domain expertise may facilitate falsification. We consider new experimental data about chess experts’ hypothesis testing. The results show that chess masters were readily able to falsify their plans. They generated move sequences that falsified their plans more readily than novice players, who tended to confirm their plans. The (...) finding that experts in a domain are more likely to falsify their hypotheses has important implications for the debate about human rationality. (shrink)

This summary note series outlines legal empirical approaches to the study of juries and jury decision-making behaviour for undergraduate students of sociology, criminology and legal systems, and forensic psychology. The note series is divided into two lectures. The first lecture attends to the background relevant to the historical rise of juries and socio-legal methodologies used to understand jury behaviour. The second lecture attends to questions surrounding jury competence, classic studies illustrative of juror bias, and a critical comparison of juries to (...) legal alternatives not reliant on jury deliberation for judicial process. Where appropriate the note series indicates key readings relevant to each core component of the note series, for students to develop their understanding in self-study time. (shrink)

This paper presents empirical findings from a set of reasoning and mock jury studies presented at the Experimental Psychology Oxford Seminar Series (2010) and the King's Bench Chambers KBW Barristers Seminar Series (2010). The presentation asks the following questions and presents empirical answers using the Lenses of Evidence Framework (Cowley & Colyer, 2010; see also van Koppen & Wagenaar, 1993): -/- Why is mental representation important for psychology? -/- Why is mental representation important for evidence law? -/- Lens 1: The (...) self representation - Key findings -/- Lens 2: The expert representation - Key findings -/- Lens 3: The anchor representation - Key findings -/- Conclusions & Future directions. -/- The series of research essentially explores how people represent evidence in mind and presents key findings now cited in the following literatures: Philosophy of Science, Cognitive Expertise, Behavioural Economics, Cognitive Science, Psychology and Public Policy, & Causation and the Law. (shrink)

Can people consistently attempt to falsify, that is, search for refuting evidence, when testing the truth of hypotheses? Experimental evidence indicates that people tend to search for confirming evidence. We report two novel experiments that show that people can consistently falsify when it is the only helpful strategy. Experiment 1 showed that participants readily falsified somebody else’s hypothesis. Their task was to test a hypothesis belonging to an ‘imaginary participant’ and they knew it was a low quality hypothesis. Experiment 2 (...) showed that participants were able to falsify a low quality hypothesis belonging to an imaginary participant more readily than their own low quality hypothesis. The results have important implications for theories of hypothesis testing and human rationality. (shrink)