Reflectance physicalism only provides a partial picture of the ontology of color. Byrne & Hilbert’ account is unsatisfactory because the replacement of reflectance functions by productance functions is ad hoc, unclear, and only leads to new problems. Furthermore, the effects of color contrast and differences in illumination are not really taken seriously: Too many “real” colors are tacitly dismissed as illusory, and this for arbitrary reasons. We claim that there cannot be an all-embracing ontology for color.

Women intimately interact with various medical technologies and prosthetic artifacts in the context of breast cancer. While extensive work has been done on the agency of technological artifacts and how they affect users’ perceptions and experiences, the agency of users is largely taken for granted hitherto. In this article, we explore the agency of four women who engage with breast cancer technologies and artifacts by analyzing their narrative accounts of such engagements. This empirical discussion is framed within the tradition of (...) science and technology studies, philosophy of technological mediation and phenomenology of embodied agency as ‘I can/not’. This approach leads to the conclusions that women’s technologically mediated agencies range from being restricted to extended, take place on different bodily levels, within complex temporal structures, and are determined by certain socio-cultural contexts. Furthermore, it reveals that such agency shaping does not imply a one-way conditioning relationship between technologies and users, but rather involves a reciprocal relationship in which both subject and object are co-constituted. We therefore suggest that the ‘material turn’ in philosophy of technology also needs to take into account technologically mediated, material human beings in order to gain a better understanding of human existence. (shrink)

The lambda model provides a physiologically grounded terminology for describing muscle function and emphasizes the important influence of environmental and reflex-mediated effects on final states. However, lambda itself is only a convenient point on the length-tension curve; its importance should not be overemphasized. Ascribing movement to changes in a lambda-based frame of reference is generally valid, but it leaves unanswered a number of questions concerning mechanisms.

Gregory Bateson is well known for defining information by stating “In fact what we mean by information – the elementary unit of information – is a difference which makes a difference…” This conceptual perspective has the merit of simplicity and generality. Simplicity, in addressing the complexity of information. Generality, in seeking applicability to any and every field of human experience. The purpose of this paper is to focus the applicability of this conceptual approach by Bateson and use it to perform (...) a calculation of taking the difference between two grey-level digital images that are shifted one relative to the other. The digital images take the place of the field of view that a human being would have access through her sense of vision at two different spatial/temporal instances. The results show that it is possible to highlight the edges of the objects under scrutiny, as well as to highlight other differences within the object. Bateson’s “difference that makes a difference” would seem to provide a first step in the elusive meaning making process of humans. (shrink)

What are the affordances of artifacts? One view is that the affordances of artifacts, just as the affordances of natural objects, pertain to possible ways in which they can be manipulated. Another view maintains that, given that artifacts are sociocultural objects, their affordances pertain primarily to their culturally-derived function. Whereas some have tried to provide a unifying notion of affordance to capture both aspects, here I argue that they should be kept separate. In this paper, I introduce a distinction between (...) standard affordances, which concern the function of artifacts, and ad-hoc affordances, which refer to how artifacts are manipulated. I then argue for the neuropsychological plausibility of such a distinction, linking it to the dissociation between function knowledge and manipulation knowledge. Finally, I defend the equal status of these forms of knowledge and, hence, of standard and ad-hoc affordances, and I show that this has some implications for the debate on the role of motor processes in the conceptual knowledge of artifacts. (shrink)

Theories of the representation of specific kinetic and spatiotem-poral features of movement range from the explicit assertion that temporal aspects of movement are not represented to the idea that they are represented and that they have neurophysiological correlates. Jeannerod's thesis is that mental and visual images have common mechanisms and that there is a link between the image to move and the mechanisms involved with movement. The target article takes the position that certain parameters are coded in motor representations but (...) that the duration of an action is not one of them. This position is based on the work of Gottlieb et al. and of Decety et al.. Both these studies are worth considering in detail. In Note 1, Jeannerod suggests that: “in time-constrained tasks subjects control the amplitude parameter of force impulses, whereas in spatially constrained tasks the duration of the force impulse is affected by accuracy demands.” This is not exactly correct. Excitation pulse intensity is modulated both in tasks that require spatial and those that require temporal accuracy. Excitation pulse duration is modulated for changes in movement distance and inertial load. If subjects are required to be very accurate spatially, they will move at less than maximum speed for a given distance and this is achieved by lower levels of excitation intensity. (shrink)

The colors we perceive are the outcome of an attempt to meaningfully order the spectral information from the environment. These colors are not the result of a straightforward mapping of a physical property to a sensation, but arise from an interaction between our environment and our visual system. Thus, although one may infer from a surface’ reflectance characteristics that it will be perceived as “colored,” true colors only arise by virtue of the interaction of the reflected light with the eye (...) (and brain) of an observer. (shrink)

The conservative strategy proposed by the authors suggests a solution of the degrees-of-freedom problem of the controller. However, several simple motor control tasks cannot be explained by this strategy. A nonconservative strategy, in which more parameters of the control signal vary, can account for these simple motor tasks. However, the simplicity that distinguishes the proposed model from many others is lost.

The notion of folk‐psychology as a primitive speculative theory of the mental is called into question. There is cause to believe that folk‐psychology has more in common with a naive physics than with early speculative physical theorising. The distinction between these is elaborated. The conclusion drawn is that commonsense ascription of psychological content, though not a suitable finishing point for cognitive science, should still provide a more reliable source of data than some contemporary theorists are willing to admit.

This paper investigates Hegel’s thesis that we are, in our practical relation to the world, inherently committed to certain aspects of idealistic metaphysics. For Hegel, our practical attitude is fundamentally at odds with a naïve realism that would take the world to consist ultimately of self-contained, self-sufficient individuals whose relations to one another are fundamentally external to their identities. Hegel contends that our practical attitude is premised upon an overcoming of this mutual externality, and especially the externality which is supposed (...) to hold between individual agent and world. It is shown that his argument hinges on conceiving of external things as inadequately individuated, as compared to living agents, and that it is precisely this ontological deficiency that conditions and motivates our action. Hegel’s discussions of morality and property ownership are appealed to in order to illustrate how we might better understand the nature and practical role of this purported deficiency. (shrink)

Naturalistic theories of disease appeal to concepts of biological function, and use the notion of dysfunction as the basis of their definitions. Debates in the philosophy of biology demonstrate how attributing functions in organisms and establishing the function-dysfunction distinction is by no means straightforward. This problematization of functional ascription has undermined naturalistic theories and led some authors to abandon the concept of dysfunction, favoring instead definitions based in normative criteria or phenomenological approaches. Although this work has enhanced our understanding of (...) disease and illness, we need not necessarily abandon naturalistic concepts of function and dysfunction in the disease debate. This article attempts to move towards a new naturalistic theory of disease that overcomes the limitations of previous definitions and offers advantages in the clinical setting. Our approach involves a re-evaluation of concepts of biological function employed by naturalistic theories. Drawing on recent insights from the philosophy of biology, we develop a contextual and evaluative account of function that is better suited to clinical medicine and remains consistent with contemporary naturalism. We also show how an updated naturalistic view shares important affinities with normativist and phenomenological positions, suggesting a possibility for consilience in the disease debate. (shrink)

The calibration solution to the stability of the world despite eye movements depends, according to Bridgeman et al., upon a combination of three factors which presumably all need to operate to achieve the goal of stability. Although the authors admit (sect. 4.3, para. 5) that the relative contributions of retinal and extraretinal factors will depend on the particular viewing situation, Figure 5 (sect. 4.3) makes it clear in its representation that the role of perceptual factors is relatively minor compared to (...) extraretinal ones. It is with this representation that this commentary wishes to take issue, believing that it occurs as a result of some assumptions about terminology that may be ambiguous, as well as some misconceptions about the circumstances in which there is a need for stability. (shrink)

“Terms that have histories cannot be defined.” – Nietzsche“[T]he reality to which we were attending seemed to resist our thinking it.” – Cora Diamond[1] Much has been learned in recent decades about the behaviour and abilities of many species of non-human animals. Increasingly many who reflect on the abilities of languageless animals are uncomfortable with a once prevalent dichotomy of either assigning these abilities to the realm of mere mechanism or granting such creatures full rationality and more or less the (...) entire range of abilities that involves. This has lead to no little reflection and debate regarding how to proceed in studying animal “cognition,” and about what counts as adequately or accurately explaining animal behaviour. I cautiously hope herein to contribute to the clarity of what is already a discussion too rich and complex to do any justice to here. Little of what I say will be original, but the particular way of approaching the issues herein may shed some light on why certain issues have endured. (shrink)

I defend a moderate (neither extremely conservative nor extremely liberal) view about the contents of perception. I develop an account of perceptual kinds as perceptual similarity classes, which are convex regions in similarity space. Different perceivers will enjoy different perceptual kinds. I argue that for any property P, a perceptual state of O can represent something as P only if P is coextensive with some perceptual kind for O. 'Dog' and 'chair' will be perceptual kinds for most normal people, 'blackpool (...) warbler' for the expert birdwatcher but not for the rest of us, 'dangerous', 'familiar', or 'meaning that the cat is on the mat' for none of us. (shrink)

In this paper, we provide an overview of research highlighting the relation between cultural processes, social norms, and food choices, discussing the implication of these findings for the promotion of more sustainable lifestyles. Our aim is to outline how environmental psychological research on urban affordances, through the specific concepts of restorative environments and walkability, could complement these findings to better understand human health, wellbeing and quality of life. We highlight how social norms and cultural processes are linked to food choices, (...) and we discuss the possible health-related outcomes of cultural differences in food practices, their relation to acculturation and globalization processes. We also discuss the concepts of restorative environments and walkability as positive urban affordances, and their relation to human well being, and the possibile link with cultural process and sustainable lifestyles. Finally, we outline issues for future research and areas for policy making and interventions on the links between cultural processes, healthy and sustainable food consumption and urban affordances, for the pursuit of public health, wellbeing and environmental sustainability. (shrink)