1. Cognitive domain of human behaviour is key in acquiring first and second languages through processes like perceiving, attending, storing, and recalling. 2. Learning theories from Pavlov, Watson, Skinner, and Ausubel contributed to understanding language learning as forming associations between stimuli and responses through conditioning, and relating new learning to prior knowledge. 3. Second language learning can occur through different types of learning including signal, stimulus-response, chaining, verbal association, multiple discrimination, concept, and problem solving learning.