Chapter 1. Introduction.- Chapter 2. The ACT-R cognitive architecture and its pyactr implementation.- Chapter 3. The basics of syntactic parsing in ACT-R.- Chapter 4. Syntax as a Cognitive Left-corner parsing with visual & motor interfaces.- Chapter 5. Brief introduction to Bayesian methods and pymc3 for linguists.- Chapter 6. Modeling linguistic performance.- Chapter 7. Competence-performance models for lexical access and syntactic parsing.- Chapter 8. Semantics as a cognitive process Discourse Representation Structures in declarative memory.- Chapter 9. Semantics as a cognitive process Active search for cataphora antecedents and the semantics of conditionals.- Chapter 10. Future directions.