DOI: https://doi.org/10.26333/sts.xxxvi2.04 Korta and Perry (2011) argue that the object a speaker refers to with a demonstrative expression combined with a pointing gesture is determined by her ...directing intention rather than by her demonstration. They acknowledge that our use of the ordinary concept of “what is said” is affected by our judgements about the speaker’s responsibility for the results of her careless pointing; however, they claim that the effects are perlocutionary and have no bearing on determining the referential content of the speaker’s act. I argue that the consequences of careless pointing are illocutionary and play a role in determining demonstrative reference. I also distinguish between two types of referential content which are attributable to the speaker’s utterance and shape its discursive behaviour: what is intended, which is determined by the speaker’s directing intention, and what is public, which depends on what she can legitimately be held responsible for.
Korta and Perry (2011) argue that the object a speaker refers to with a demonstrative expression combined with a pointing gesture is determined by her directing intention rather than by her ...demonstration. They acknowledge that our use of the ordinary concept of “what is said” is affected by our judgements about the speaker’s responsibility for the results of her careless pointing; however, they claim that the effects are perlocutionary and have no bearing on determining the referential content of the speaker’s act.I argue that the consequences of careless pointing are illocutionary and play a role in determining demonstrative reference. I also distinguish between two types of referential content which are attributable to the speaker’s utterance and shape its discursive behaviour: what is intended, which is determined by the speaker’s directing intention, and what is public, which depends on what she can legitimately be held responsible for.
This paper argues that a theory of
situated vision, suited for the dual purposes of object recognition and the control of action, will have to provide something more than a system that constructs a ...conceptual representation from visual stimuli: it will also need to provide a special kind of direct (preconceptual, unmediated) connection between elements of a visual representation and certain elements in the world. Like natural language demonstratives (such as ‘this’ or ‘that’) this direct connection allows entities to be referred to without being categorized or conceptualized. Several reasons are given for why we need such a preconceptual mechanism which individuates and keeps track of several individual objects in the world. One is that early vision must pick out and compute the relation among several individual objects while ignoring their properties. Another is that incrementally computing and updating representations of a dynamic scene requires keeping track of token individuals despite changes in their properties or locations. It is then noted that a mechanism meeting these requirements has already been proposed in order to account for a number of disparate empirical phenomena, including subitizing, search-subset selection and multiple object tracking (Pylyshyn et al.,
Canadian Journal of Experimental Psychology 48(2) (1994) 260). This mechanism, called a
visual index or FINST, is briefly discussed and it is argued that viewing it as performing a demonstrative or preconceptual reference function has far-reaching implications not only for a theory of situated vision, but also for suggesting a new way to look at why the primitive individuation of visual objects, or proto-objects, is so central in computing visual representations. Indexing visual objects is also, according to this view, the primary means for grounding visual concepts and is a potentially fruitful way to look at the problem of visual integration across time and across saccades, as well as to explain how infants' numerical capacity might arise.
In contrast to Constructivist Views, which construe perceptual cognition as an essentially reconstructive process, this article recommends the Deictic View, which grounds perception in ...perceptual-demonstrative reference and the use of deictic tracking strategies for acquiring and updating knowledge about individuals. The view raises the problem of how sensory-motor tracking connects to epistemic and integrated forms of tracking. To study the strategies used to solve this problem, we report a study of the ability to track distal individuals when only their directions can be perceived and not their locations. We introduce a new experimental paradigm named the 'Modified Traveling Salesman Problem' (MTSP), which requires subjects to visit n invisible targets in a 2D display once each. Surprisingly, subjects are competent at this task for up to 10 targets. We consider two types of tracking strategies that subjects might use: 'location-based' strategies and 'deictic direction-based' strategies. A number of observations suggest that subjects used the latter, at least for larger numbers of targets. We hypothesize that subjects used perceptual-demonstrative reference and deictic strategies (i) to perform the sensory-motor tracking of directional segments, (ii) to bind the segments with their updated status in the task, and (iii) to perform the epistemic tracking of invisible targets by means of perception-based inferences.
Nicolas Bullot is a Postdoctoral Fellow in the Department of Philosophy, University of Toronto. Jacques Droulez is Director of Research at the Laboratoire de Physiologie de la Perception et de l'Action (UMR 7152, Centre National de la Recherche Scientifique Collège de France).
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