cognitive psychology. PhD 
thinking about the stuff about chess players easily memorizing valid chess positionshttps://twitter.com/michael_nielsen/status/1115342314119938049 …
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Also physics: "experts tended to categorize problems into types that are defined by the major physics principles that will be used in solution, whereas novices tend to categorize them into types as defined by the entities contained in the problem statement."
Chi, Michelene T. H., Paul J. Feltovich, and Robert Glaser. “Categorization and Representation of Physics Problems by Experts and Novices*.” Cognitive Science 5, no. 2 (April 1981): 121–52. https://doi.org/10.1207/s15516709cog0502_2 ….
