Articulating the ineffable. Programming language theory 
cognitive psychology. PhD @Stanford
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My favorites: Pennington, “Stimulus Structures and Mental Representations in Expert Comprehension of Computer Programs.” Letovsky, “Cognitive Processes in Program Comprehension.” Anderson, Farrell, and Sauers, “Learning to Program in LISP.”
Pennington paper is creative experimental work on using chunks to identify whether programmers mentally represent programs as data-flow, control-flow, etc. Letovsky paper uses careful analysis of protocols w/ experts to characterize bottom-up vs. top-down reasoning & schemata.
Anderson et al. builds a production system to mirror protocols of novices learning Lisp. Early cognitive tutor work. Useful to think about how to model complex mental processes like reasoning by analogy.
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