Which theory is most often cited in second language acquisition according to the material?

• A. Interactionist
• B. Behaviorist learning theory
• C. Krashen's Monitor Model
• D. Cognitive learning theory

Answer: (C)

The idea being tested is which theoretical lens the material uses most often to explain how people learn a second language. The one most frequently referenced is Krashen's Monitor Model. This view provides a clear, widely taught framework: language is acquired when learners are exposed to meaningful, comprehensible input that is just beyond their current ability (the i+1 idea), rather than learned through explicit rules alone. It also introduces key notions like the distinction between acquisition and learning, the Natural Order of acquisition, the Monitor for conscious form-editing, and the Affective Filter, which can either help or hinder progress depending on emotional factors.

Because these components are repeatedly integrated into explanations, activities, and assessments across the material, Krashen's model tends to be cited more often than other theories. By contrast, interactionist theory emphasizes learning through social interaction and negotiating meaning; behaviorist theory focuses on habit formation through repetition and reinforcement; cognitive learning theory centers on internal mental processes. While these bring valuable insights, they are not the dominant, most-cited framework in the material.