Figure 2.

The architecture of the model. The input layer, containing eight nodes, is shown on the far right; the two layers of stimulus representations [perirhinal cortex (PRh) and caudal] are shown to the left of the input layer. Stimulus inputs to the network have eight “stimulus dimensions” (attributes); each dimension is represented in the diagram by an individual input node. Stimulus dimensions are paired into four features. Each feature is shown in a distinct color and is represented individually on the caudal layer. On the perirhinal cortex layer, the four features are combined into a conjunction, shown in gray, which represents the whole stimulus.