Increased practice exposes the performer to a wide variety of typical whole situations. Each whole situation, for the first time, has a meaning which is its relevance to the achievement of a long-term goal. Aspects now appear to be more or less important (salient) depending upon their relevance to this goal. [...] Given a set of aspects and their saliences, the performer uses a memorized principle which we call a maxim to determine the appropriate action.
Stuart E. Dreyfus, Hubert L. Dreyfus. A five-stage model of the mental activities involved in directed skill aquisition. 1980
