Theoretical background:
Arib and Lieblich (1977, see also Lieblich and Arbib, 1982) represented the cognitive map as a graph, i.e., a set of nodes some of which are connected by edges, with nodes corresponding to a recognizable situation in the animal's world (cf. the stations on a subway map), and with each edge representing a path from a recognizable situation to the next. This "world graph" (WG) is constructed so that the organism has the ability to move from one point to another in a fashion determined by both cognitive knowledge and motivational states.
For more information on the WG theory, please refer to the papers listed in the Hippocampus and Navigation Group homepage.
Representing the world graph ...
In the TAM-WG model, the World Graph is non-neural, and is represented as nodes connected by edges. Edges are directional and this is represented by a little circle attached to the nodes they point to. The figures below shows a typical world graph created for a T-maze and for an 8-arm radial maze. The currently active node is painted red (with an X inside), while the other nodes are green. You can click on any node to get information relative to a particular node (displayed in the Java Console). You are also allowed to drag a node to a different position in the window. To do it, just select a node and, while holding down the the right button of the mouse, drag the node to the new desired position.
University
of Southern California Brain Simulation Lab
All contents copyright (C) 1994-1997. University of Southern California Brain Simulation Lab All rights reserved.Author: Alex Guazzelli <aguazzel@rana.usc.edu>