# John R. Anderson John R. Anderson (b. 1947) is a cognitive psychologist who developed ACT-R (Adaptive Control of Thought—Rational), one of the most influential [[Cognitive Architecture]]s. ACT-R models cognition as the interaction of declarative memory (facts), procedural memory (skills), and perceptual-motor modules, all coordinated through a central production system. It has been used to model learning, problem-solving, and skill acquisition. Anderson's work bridges cognitive psychology and AI, showing how complex cognition emerges from simple mechanisms. ACT-R makes quantitative predictions about reaction times and brain activation (validated with fMRI). His "rational analysis" approach asks what cognitive system would be optimal given environmental constraints—connecting to [[Gerd Gigerenzer]]'s ecological rationality. ## Key Contributions | Contribution | Significance | |--------------|--------------| | ACT-R | Major cognitive architecture | | Rational analysis | Optimal cognition given constraints | | Skill acquisition theory | Power law of practice | ## Quotes <!-- QueryToSerialize: LIST FROM #type/quote AND [[John R. Anderson]] WHERE public_note = true SORT file.name ASC --> ## Books <!-- QueryToSerialize: LIST FROM #type/book AND [[John R. Anderson]] WHERE public_note = true SORT file.name ASC --> ## Related - [[Cognitive Architecture]] - [[Cognitive Science]] - [[Gerd Gigerenzer]] ## References - Anderson, John R. *The Architecture of Cognition* (1983) - https://en.wikipedia.org/wiki/John_Robert_Anderson_(psychologist)