The question of whether time is its own best representation is explored. Though there is theoretical debate between proponents of internal models and embedded cognition proponents (e.g. Brooks R 1991 Artificial Intelligence 47 139–59) concerning whether the world is its own best model, proponents of internal models are often content to let time be its own best representation. This happens via the time update of the model that simply allows the model’s state to evolve along with the state of the (...) modeled domain. I argue that this is neither necessary nor advisable. I show that this is not necessary by describing how internal modeling approaches can be generalized to schemes that explicitly represent time by maintaining trajectory estimates rather than state estimates. Though there are a variety of ways this could be done, I illustrate the proposal with a scheme that combines filtering, smoothing and prediction to maintain an estimate of the modeled domain’s trajectory over time. I show that letting time be its own representation is not advisable by showing how trajectory estimation schemes can provide accounts of temporal illusions, such as apparent motion, that pose serious difficulties for any scheme that lets time be its own representation. (shrink)

Plant predictive processing suggests that plants anticipatorily perceive their environment. This hypothesis runs up against a challenge which takes the form of two constraints on per- ception advanced by Tyler Burge: the veridicality constraint and the constancy constraint. This paper argues that the veridicality constraint can be satisfied by assuming a general account of predictive processing. To show how the constancy constraint may be fulfilled, an ecologically informed account of invariant pick-up is developed and given a place within plant predictive (...) processing. It is concluded that, against our anthro- pocentric folk-psychological notions of perception, there is reason to believe that plants engage in minimal perception. (shrink)

The Grand Illusion, the experience of a rich phenomenal visual world supported by a poor internal representation of that world, is echoed by petit illusions of the same sort. We can be aware of several aspects of an object or pattern, even when they are inconsistent with one another, because different neurological mechanisms code the various aspects separately. They are bound not by an internal linkage, but by the structure of the world itself. Illusions exploit this principle by introducing inconsistencies (...) into normally consistent patterns of stimulation. (shrink)

At the center of both Humean and Kantian experience is a connection between the objectivity of perception and the concept of substantial identity. In the course of examining both systems as responses to structurally similar problems of perceptual objectivity, I argue that Kant's conception of substantial persistence is superior to Hume's account of the idea of identity. ;There are deep tensions in Hume's account of perception that are partially explicable in terms of his complex and naturalistic 'moderate scepticism' (...) and the conflict in the faculties of causal reasoning and imagination upon which it rests. Despite the subtlety of his explanatory scepticism, however, there remains a damaging vacillation in Hume between perceptible phenomena understood as the objects of 'vulgar' direct realism on the one hand, and as the subjective images of the causal-representationalist philosophy on the other. There are also difficulties with Hume's idea of perfect identity, the foundation of both the vulgar and philosophical systems of belief in body. Starting from an assumption of radical perceptual diversity, Hume unsuccessfully attempts to build an idea of substantial identity upon the fiction of a duration without change. ;The tension in Hume concerning the direct objects of perception is paralleled by the subjective/objective ambiguity of Kant's perceptual content terms. In Kant, however, the ambiguity reflects a coherent account of conceptualization, perceptual judgment, and self-conscious temporal experience. I examine Kant's arguments for the persistence and absolute permanence of substance and show that they are largely successful if premises are supplied from the general account of objective judgment and the unity of consciousness. ;Hume's theory of perceptual belief is ingenious but ultimately unsatisfactory according to his own criteria. His failure to construct an idea of identity upon a fictitious duration casts favorable light on Kant's contention that substantial identity is a condition on having any cognition of duration. The two philosophers' dispute concerning identity is conceptually connected to their differing treatments of the 'given' element in perception. (shrink)

O SET THE STAGE for the discussion[1], I will rehearse and clarify a well-known dispute between A. J. Ayer and J. L. Austin concerning whether perceptual judgments are inferences. Both in his Sense and Sensibilia[2] and in his "Other Minds,"[3] Austin carefully distinguishes recognizing that p from inferring that p. For the purpose of comparing his position to Ayer's, we might put his basic claim in this way: given the way words such as "recognize" and "infer" are used outside philosophical (...) discussions, one clearly distinguishes instances of recognizing from instances of inferring. Yet Ayer does not dispute that, but replies that while non-philosophers do make a sharp distinction between the two, it is arbitrary for philosophical purposes.[4] Claims based upon one's having recognized something are sufficiently like claims based upon one's having inferred, Ayer supposes, that it is useful to treat them as instances of a common category. So the issue is not whether the distinction is recognized outside philosophical circles, but whether it is a defensible and useful one to make. Clearly, Austin insists upon the distinction because he supposes that failing to make it will promote philosophical confusion; indeed, he argues that one traditional problem of skepticism is largely due to this confusion.[5] In his "Other Minds," Austin tries to suggest how recognizing differs from inferring by showing how the sorts of questions or challenges brought to bear differ between the two sorts of claim:[6] for inferences, one wants a rehearsal of the pieces of evidence and an account of their connections to the judgment; for perceptual claims of recognition, one explores whether the observer had the opportunity to see what he claimed to have seen, whether he had acquired the expertise to recognize the sort of thing he claimed to have seen, and whether the circumstances were free of evident distraction and defect. But his readers' appreciation of these things depends. (shrink)

_Phenomenology of Perception: Theories and Experimental Evidence_ presents an interpretation of phenomenology as a set of commitments to discover the immanent grammar of perception by reviewing arguments and experimental results that are still important today for psychology and the cognitive sciences.

Our seamless perception of the world depends very much on the slow time scales used by conscious perception. Time scales longer than one second are needed to assemble conscious experience. At time scales shorter than one second, this seamlessness quickly deteriorates. Numerous experiments reveal the fragmentary nature of the visual information used to construct visual experience. Models of how the brain manages these fragments use the construct of a routine, which is a task-specific fragment of a sensory-motor program. (...) This paper provides an overview of some of the experiments that test these models. Its aim is to show how the structures that they elucidate constrain the understanding of conscious perception. (shrink)

The present paper analyzes the regularities referred to via the concept 'self.' This is important, for cognitive science traditionally models the self as a cognitive mediator between perceptual inputs and behavioral outputs. This leads to the assertion that the self causes action. Recent findings in social psychology indicate this is not the case and, as a consequence, certain cognitive scientists model the self as being epiphenomenal. In contrast, the present paper proposes an alternative approach (i.e., the event-control approach) that is (...) based on recently discovered regularities between perception and action. Specifically, these regularities indicate that perception and action planning utilize common neural resources. This leads to a coupling of perception, planning, and action in which the first two constitute aspects of a single system (i.e., the distal-event system) that is able to pre-specify and detect distal events. This distal-event system is then coupled with action (i.e., effector-control systems) in a constraining, as opposed to 'causal' manner. This model has implications for how we conceptualize the manner in which one infers the intentions of another, anticipates the intentions of another, and possibly even experiences another. In conclusion, it is argued that it may be possible to map the concept 'self' onto the regularities referred to in the event-control model, not in order to reify 'the self' as a causal mechanism, but to demonstrate its status as a useful concept that refers to regularities that are part of the natural order. (shrink)