From entry ACT-R in glossary Artificial Intelligence: humans at the heart of algorithms
ACT-R (formerly known as ACT*) has been developed by John Robert Anderson and others over the past 40 years. It comprises a large long-term memory in the form of a semantic net, a small working memory of active items and a production system that operates on the memories. ACT-R includes mechanisms (i) to make commonly used instances of general rules more specific (called proceduralisation) and also to take multiple specific rules with similar structure and create a single more abstract rule (called generalisation).
Used in Chap. 6: page 97