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Outlines a theory of action in which an action sequence is represented by a parent schema and numerous child schemas, in which several action schemas can be active at any one time, and in which each schema has a set of triggering conditions and an activation value. The path from intention to action consists of the activation of the parent schema that corresponds to the intention, the activation of child schemas for the component parts of the action sequence, and then the appropriate triggering of schemas when the conditions match those required for their operations. This action system allows slips to be organized into 3 major categories and a number of subcategories. The 3 major categories of slips are (a) errors in the formation of the intention (eg, mode and description errors);(b) faulty activation of schemas (eg, loss of intention and misordering of action components); and (c) faulty triggering (eg, spoonerisms …