Ernest's model

This picture shows how Ernest is modeled in Soar's "working memory" (shift-click to enlarge in a new window).

For example, a schema printed in the trace as (AX B Y) (2) is stored as a subgraphe <sch> of the schema memory node <scm>. AX is the context (<sch>.<con>) made up of the previous action A (<con>.<set>) and the previous response X (<con>.<get>). B is the action proposed by the schema (<sch>.<set>). Y is the schema expectation (<sch>.<get>), (2) is the schema weight (<sch>.<wei>).

So far, the context only covers one round. It depends on the short-term memory span, because it is temporarily stored in short-term memory before the next response from the environment is known, and the schema can be memorized. Nevertheless, the short-term memory, and thus the context, can be enlarged.