Keith Allen

David Katz was an empirical psychologist with a deep and abiding interest in phenomenology. This paper reconstructs his theory of colour and colour perception, central to which is a distinctive account of the perception of illumination and empty space. Katz's views were an important influence on both the Gestalt psychologists and phenomenologists such as Merleau‐Ponty, and have contemporary relevance to ongoing debates about the nature of colour and colour perception. Reflection on Katz's theory of colour and colour perception provides a way of understanding whether, and in what sense, Katz was a phenomenologist; it thereby provides a perspective on wider questions about the nature of phenomenology.

Longstanding philosophical debates about the nature of perception revolve around a clash between Direct Realist and Indirect Realist conceptions of vision. These deny and affirm, respectively, that vision involves awareness of mental images which represent the physical objects of sight. The assumption that ‘the’ common-sense conception of vision is Direct Realist shapes these debates. Against this key assumption, recent studies in experimental philosophy have provided first evidence that laypeople are, collectively and often individually, torn between Direct Realist and Indirect Realist conceptions, and regard both as naïve. These findings raise a general methodological issue: Does agreement with two such patently incompatible conceptions reflect genuine beliefs? This paper crucially extends first findings, examines whether agreement ratings are indicative of beliefs, and offers an explanation of how the conflicting beliefs involved could be acquired and maintained. Three studies develop and validate the new Direct/Indirect Realist Belief Inventory (DIRBI) which uses agreement ratings with verbal and pictorial stimuli to assess the prevalence of the two conflicting conceptions among laypeople. Findings confirm that laypeople hold relevant beliefs and are, collectively and individually, torn between the two conceptions. We suggest these beliefs are ultimately anchored in ubiquitous implicit knowledge structures, namely, experiential event knowledge about vision and an implicit model of endogenous attention. We conclude that there is no such thing as ‘the’ common-sense conception of vision that could enjoy the epistemic default status accorded to common sense in many philosophical debates.

How should we decide between philosophical theories of perception? This paper addresses this question by considering the debate between naïve realists and their opponents, and in particular the claim that naïve realism provides a distinctive way of resolving the Problem of Consciousness. I argue that the naïve realist’s solution requires rejecting what many consider to be a ‘fixed point’ in theorizing about perception: a commitment to physicalism. In light of this, I consider different ways of understanding naïve realism and its motivation, suggesting that naïve realism might be best understood as a transcendental theory of perception.

This volume brings together a collection of new essays by leading scholars on the subject of causation in the early modern period, from Descartes to Lady Mary Shepherd. Aimed at researchers, graduate students and advanced undergraduates, the volume advances the understanding of early modern discussions of causation, and situates these discussions in the wider context of early modern philosophy and science. Specifically, the volume contains essays on key early modern thinkers, such as Descartes, Hobbes, Spinoza, Leibniz, Hume, Kant. It also contains essays that examine the important contributions to the causation debate of less widely discussed figures, including Louis la Forge, Thomas Brown and Lady Mary Shepherd.

This volume brings together a collection of new essays by leading scholars on the subject of causation in the early modern period, from Descartes to Lady Mary Shepherd. Aimed at researchers, graduate students and advanced undergraduates, the volume advances the understanding of early modern discussions of causation, and situates these discussions in the wider context of early modern philosophy and science. Specifically, the volume contains essays on key early modern thinkers, such as Descartes, Hobbes, Spinoza, Leibniz, Hume, Kant. It also contains essays that examine the important contributions to the causation debate of less widely discussed figures, including Louis la Forge, Thomas Brown and Lady Mary Shepherd.

Philosophical debates about the nature of perception are standardly informed by an empirical assumption about folk beliefs: They assume there is such a thing as “the” common‐sense conception of vision, and that this conception is captured by Direct Realism. This naïve theory is thought to compete with scientifically informed Indirect Realism. This paper discusses how to render these claims empirically tractable and reports a scientific accuracy rating study whose findings suggest instead that both Direct Realism and Indirect Realism capture prescientific conceptions. We discuss two philosophical consequences: “Common sense” is too conflicted about vision to deserve epistemic default status in philosophical debates about perception, and the “problem of perception” needs to be reconceptualized as arising not from a challenge to our ordinary understanding of vision, but from a patent conflict within this understanding. Together, these two upshots facilitate a fresh approach to the problem which can usefully be transferred to further “aporetic” problems that arise from conflicts between beliefs to which we are pretheoretically attracted.

This article explores home dissatisfaction using methods modelled on those used to understand negative body image and its causes. We found that a substantial proportion of UK participants (13–39%) expressed dissatisfaction with their homes. Although the strongest association was between home dissatisfaction and reported physical problems, there was evidence that dissatisfaction is also predicted by experiencing pressure from the media and your family to improve your home, as well as reporting a greater tendency to compare your home to others’. The results of the study provide initial evidence for a sociocultural explanation of home dissatisfaction, analogous to sociocultural explanations of body dissatisfaction.

This chapter examines the debates concerning the theory of ideas in Great Britain during the seventeenth century, focusing on the concept, origin, and types of ideas. It explains that the so-called way of ideas that are primarily associated with Rene Descartes and John Locke represent attempts to replace scholastic Aristotelian theories of the nature of the mind and its relation to the world. The chapter also discusses the relevant works of Thomas Hobbes and the Cambridge Platonists, and considers the relevance of skepticism and idealism to the notion of ideas.

Many philosophers believe that there is a causal condition on perception, and that this condition is a conceptual truth about perception. A highly influential argument for this claim is based on intuitive responses to Gricean style thought experiments. Do the folk share the intuitions of philosophers? Roberts et al. (2016) presented participants with two kinds of cases: Blocker cases (similar to Grice’s case involving a mirror and a pillar) and Non-Blocker cases (similar to Grice’s case involving a clock and brain stimulation). They found that a substantial minority agreed that seeing occurs in the Non-Blocker cases, and that in the Blocker cases significantly less agreed that seeing occurs. They thus hypothesized that folk intuitions better align with a no blocker condition than with a causal condition. This paper continues this line of enquiry with two new experiments. The paper investigates the generality and robustness of Roberts et al.’s findings by expanding the sense modalities tested from only vision to audition and olfaction as well. The paper also uses Gricean style thought experiments as a case study for investigating the “reflection defense” against the negative project in experimental philosophy. Our results replicate and extend Roberts et al.’s study and support their hypothesis that folk intuitions better align with a no blocker condition. They also provide an empirical reason to doubt the reflection defense.

Many philosophers believe that there is a causal condition on perception, and that this condition is a conceptual truth about perception. A highly influential argument for this claim is based on intuitive responses to Gricean-style thought experiments. Do the folk share the intuitions of philosophers? Roberts et al. (2016) presented participants with two kinds of cases: Blocker cases (similar to Grice’s case involving a mirror and a pillar) and Non-Blocker cases (similar to Grice’s case involving a clock and brain stimulation). They found that a substantial minority agreed that seeing occurs in the Non-Blocker cases, and that in the Blocker cases significantly less agreed that seeing occurs. They thus hypothesized that folk intuitions better align with a no blocker condition than with a causal condition. This paper continues this line of enquiry with two new experiments. The paper investigates the generality and robustness of Roberts et al.’s findings by expanding the sense modalities tested from only vision to audition and olfaction as well. The paper also uses Gricean-style thought experiments as a case study for investigating the “reflection defense” against the negative project in experimental philosophy. Our results replicate and extend Roberts et al.’s study and support their hypothesis that folk intuitions better align with a no blocker condition. They also provide an empirical reason to doubt the reflection defense.

Margaret Cavendish was a contemporary critic of the mechanistic theories of matter that came to dominate seventeenth-century thought and the proponent of a distinctive form of non-mechanistic materialism. Colour was a central issue both to the mechanistic theories of matter that Cavendish opposed and to the non-mechanistic alternative that she defended. This chapter considers the form of colour realism that Cavendish developed to complement her non-mechanistic materialism, and uses her criticisms of contemporary views of colour to try to better understand the experimental approach to natural philosophy associated with writers like Hooke and Boyle. Allen argues that Cavendish’s discussion of colour in Observations upon Experimental Philosophy helps to show that there was a close connection between experimental philosophy and mechanistic theories of matter, and that, at least in the middle of the seventeenth century, experimental and speculative forms of mechanism were not mutually exclusive.

This paper develops a form of transcendental naïve realism. According to naïve realism, veridical perceptual experiences are essentially relational. According to transcendental naïve realism, the naïve realist theory of perception is not just one theory of perception amongst others, to be established as an inference to the best explanation and assessed on the basis of a cost-benefit analysis that weighs performance along a number of different dimensions: for instance, fidelity to appearances, simplicity, systematicity, fit with scientific theories, and so on. Rather, naïve realism enjoys a special status in debates in the philosophy of perception because it represents part of the transcendental project of explaining how it is possible that perceptual experience has the distinctive characteristics it does. One of the potentially most interesting prospects of adopting a transcendental attitude towards naïve realism is that it promises to make the naïve realist theory of perception, in some sense, immune to falsification. This paper develops a modest form of transcendental naïve realism modelled loosely on the account of the reactive attitudes provided by Strawson in ‘Freedom and Resentment’, and suggests one way of understanding the claim that naïve realism is immune to falsification.

What are hallucinations? A common view in the philosophical literature is that hallucinations are degenerate kinds of perceptual experience. I argue instead that hallucinations are degenerate kinds of sensory imagination. As well as providing a good account of many actual cases of hallucination, the view that hallucination is a kind of imagination represents a promising account of hallucination from the perspective of a disjunctivist theory of perception like naïve realism. This is because it provides a way of giving a positive characterisation of hallucination—rather than characterising hallucinations in negative, relational, terms as mental events that are subjectively indistinguishable from veridical perceptual experiences.

Variations in colour perception have featured prominently in recent attempts to argue against the view that colours are objective mind-independent properties of the perceptual environment. My aim in this paper is to defend the view that colours are mind-independent properties in response to worries arising from one type of empirically documented case of perceptual variation: variation in the perception of the «unique hues». §1 sets out the challenge raised by variation in the perception of the unique hues. I argue in §2 that the empirical findings are less dramatic than they might initially appear, and in §3 that accounting for the inter-personal differences is consistent with the view that colours are mind-independent properties that normal subjects veridically perceive, at least roughly speaking.

Ralph Cudworth (1617–1688) is a member of the group of philosophers and theologians commonly called ‘the Cambridge Platonists’. Although not part of the canon of great early modern philosophers, Cudworth’s work is of more than merely passing interest. Cudworth was an influential philosopher in the early modern period both for his criticisms of contemporaries like Hobbes, Descartes, and Spinoza, and for his own distinctive philosophical views. This entry focusses on Cudworth’s views on mind and body, considering both his criticisms of contemporaries’ theories of mind and body, and outlining his alternative form of dualism in which plastic nature plays a central role.

Inter-species variation in colour perception poses a serious problem for the view that colours are mind-independent properties. Given that colour perception varies so drastically across species, which species perceives colours as they really are? In this paper, I argue that all do. Specifically, I argue that members of different species perceive properties that are determinates of different, mutually compatible, determinables. This is an instance of a general selectionist strategy for dealing with cases of perceptual variation. According to selectionist views, objects simultaneously instantiate a plurality of colours, all of them genuinely mind-independent, and subjects select from amongst this plurality which colours they perceive. I contrast selectionist views with relationalist views that deny the mind-independence of colour, and consider some general objections to this strategy.

Colours appear to instantiate a number of structural properties: for instance, they stand in distinctive relations of similarity and difference, and admit of a fundamental distinction into unique and binary. Accounting for these structural properties is often taken to present a serious problem for physicalist theories of colour. This paper argues that a prominent attempt by Byrne and Hilbert to account for the structural properties of the colours, consistent with the claim that colours are types of surface spectral reflectance, is unsuccessful. Instead, it is suggested that a better account of the structural properties of the colours is provided by a form of non-reductive physicalism about colour: a naïve realist theory of colour, according to which colours are superficial mind-independent properties.

Locke Defines Knowledge at the beginning of Book IV of the Essay concerning Human Understanding as “the perception of the connexion and agreement, or disagreement and repugnancy of any of our Ideas” (E IV.i.2).1 So defined, knowledge varies along two dimensions. On the one hand, there are four “sorts” of knowledge: of identity or diversity; relation; co-existence or necessary connection; and real existence. On the other hand, there are three “degrees” of knowledge: intuitive knowledge, which consists in the “immediate” perception of agreement or disagreement between ideas (E IV.ii.1); demonstrative knowledge, which consists in the perception of agreement or disagreement by way of intermediate (or intervening)..

This paper presents an ‘over-representational’ account of blurred visual experiences. The basic idea is that blurred experiences provide too much, inconsistent, information about objects’ spatial boundaries, by representing them as simultaneously located at multiple locations. This account attempts to avoid problems with alternative accounts of blurred experience, according to which blur is a property of a visual field, a way of perceiving, a form of mis-representation, and a form of under-representation.