That is, they see practice as the key ingredient of language acquisition.
The most well-known of these theories is based on John Anderson's adaptive control of thought model.
[3][4] In this model, skill acquisition is seen as a progression from declarative to procedural knowledge.
[4] Adaptive control of thought is a general model of cognition, and second-language acquisition is just one application of a wide area of research in cognitive psychology.
[5] Second-language acquisition is seen as a progression through three stages, declarative, procedural, and autonomous.