This theory focuses more on the correctness of the language.

This theory is more concerned about how the language is acquired rather than learned.

Suggests that producing language (speaking or writing) plays a crucial role in second language acquisition.

This idea contrasts with Krashen's Input Hypothesis, which focuses on exposure to comprehensible input without requiring conscious awareness.

This concept was introduced by Larry Selinker in 1972 as part of his work on interlanguage.

It is a transitional system that combines elements of the learner's native language (L1) and the target language (L2)

Concept introduced by Lev Vygotsky, a Soviet psychologist, to describe the range of tasks that a learner can perform with guidance but cannot yet accomplish independently.

Theory proposed by Noam Chomsky, suggesting that humans are born with an innate ability to acquire language.

Suggests that there is a biologically determined window during which humans are most capable of acquiring language.

It suggests that language development occurs through the interaction between a child's innate abilities and their environment, particularly through meaningful social interactions.

Dynamic System Theory