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Artificial Intelligence and Soft Computing: Behavioral ... - Arteimi.info

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storage in memory <strong>and</strong> automatic recall [27]. It also includes construction of<br />

higher level percepts from primitive/low level <strong>info</strong>rmation/knowledge, hereafter<br />

referred to as perception. The chapter is an outgrowth of the last thirty years’<br />

research in neurocomputing <strong>and</strong> cognitive science. It elucidates various models<br />

of cognition to represent different types of sensory <strong>info</strong>rmation <strong>and</strong> their<br />

integration on memory for underst<strong>and</strong>ing <strong>and</strong> reasoning with the real world<br />

context. It also outlines the process of construction of mental imagery from the<br />

real instances for subsequent usage in underst<strong>and</strong>ing complex three-dimensional<br />

objects.<br />

The chapter starts with the cognitive perspective of pattern recognition. It<br />

covers elementary matching of ‘sensory instances’ with identical ‘templates’<br />

saved in memory. This is referred to as the ‘template matching theory’. The<br />

weakness of the template matching theory is outlined <strong>and</strong> the principle to<br />

overcome it through matching problem instances with stored minimal<br />

representational models (prototypes) is presented. An alternative featurebased<br />

approach for pattern recognition is also covered in this chapter. A more<br />

recent approach to 3-dimensional object recognition based on Marr’s theory is<br />

also presented here.<br />

The next topic, covered in the chapter, is concerned with cognitive models<br />

of memory. It includes the Atkinson-Shiffring’s model, the Tulving’s model<br />

<strong>and</strong> the outcome of the Parallel Distributed Processing (PDP) research by<br />

Rumelhart <strong>and</strong> McClell<strong>and</strong> [30].<br />

The next section in the chapter deals with mental imagery <strong>and</strong> the<br />

relationship among its components. It includes a discussion on the<br />

relationship between object shape versus imagery <strong>and</strong> ambiguous figures<br />

versus their imagery. Neuro-physiological support to building perception from<br />

imagery is also outlined in this section. Representation of spatial <strong>and</strong> temporal<br />

<strong>info</strong>rmation <strong>and</strong> the concept of relative scaling is also presented here with a<br />

specialized structure, called cognitive maps.<br />

Underst<strong>and</strong>ing a problem <strong>and</strong> its representation in symbolic form is<br />

considered next in the chapter. Examples have been cited to demonstrate how a<br />

good representation serves an efficient solution to the problem.<br />

The next section proposes a new model of cognition based on its<br />

behavioral properties. The model consists of a set of mental states <strong>and</strong> their<br />

possible inter-dependence. The state transition graph representing the model<br />

of cognition includes 3 closed cycles, namely, i) the sensing-action cycle, ii)<br />

the acquisition-perception cycle, <strong>and</strong> iii) the sensing-acquisition-perceptionplanning-action<br />

cycle. Details of the functionaries of the different states of<br />

cognition will be undertaken in this section.

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