Keeping Track of Invisible Individuals While Exploring a Spatial Layout with Partial Cues: Location-based and Deictic Direction-based Strategies
David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Ezio Di Nucci
Jack Alan Reynolds
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Philosophical Psychology 21 (1):15-46 (2008)
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.
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References found in this work BETA
David Marr (1982). Vision. Freeman.
Gareth Evans (1982). Varieties of Reference. Oxford University Press.
Joseph Almog, John Perry & Howard K. Wettstein (eds.) (1989). Themes From Kaplan. Oxford University Press, Usa.
Citations of this work BETA
Nicolas Bullot (2009). Toward a Theory of the Empirical Tracking of Individuals: Cognitive Flexibility and the Functions of Attention in Integrated Tracking. Philosophical Psychology 22 (3):353-387.
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