Expert Mental Representations

Mental representations are the load-bearing construct of Ericsson's entire framework. They are not facts stored in memory, procedures recalled on demand, or skills tested on examinations. They are rich, flexible, structurally complex internal models of a domain that encode not merely what things are but what they mean, what they imply, what typically follows from them, and what responses they demand. The chess master's representations encode dynamic relationships between pieces; the surgeon's encode the feel of healthy versus diseased tissue; the musician's encode the dynamic arc of a phrase. These representations are the cognitive substrate that distinguishes the expert from the merely experienced, and the critical property that makes the entire framework relevant to the AI debate is that they can only be constructed through the effortful engagement of the practitioner with problems that exceed her current understanding. Remove the engagement, and the representations do not form, regardless of how much output the practitioner produces through tool-assisted production.