Author(s)

Jinhou Zheng

Corresponding Author

Jinhou Zheng

ABSTRACT

Stephen Krashen’s theory of second language acquisition has a profound impact on Second Language Acquisition (SLA) teaching and learning. However, it has a huge debate on his input theory and affective filter hypothesis. By reviewing recent researchers’ works, the author finds that to complete or testify the “i+1” hypothesis, some aspects should be considered. This paper generalizes the five hypotheses of Krashen’s SLA theory and reviews Krashen’s input theory of “i+1”, trying to provide new arguments for its application in SLA. This paper will analyze Krashen’s hypothesis more deeply and try to offer new thoughts for “i+1” of input theory, including (1)the “i+1” time management factors in SLA; (2)match the zone of proximal development (ZPD) with the input theory, (3) the ideal resources of “i+1” given by caretakers to acquirers. To figure out what factors would affect “i+1” has practical guiding significance for improving the quality of SLA teaching and enable acquirers to explore foreign language learning more deeply.

KEYWORDS

SLA, input theory, i+1, ZPD, affective filter, Krashen