Stephen Krashen — Second‑Language Acquisition Theorist and Education Advocate
Linguist and education researcher known for influential hypotheses on second‑language acquisition, advocacy of bilingual education and free voluntary reading, and work as professor emeritus at USC.
Stephen Krashen is an American linguist and educational researcher best known for shaping modern views of how people learn second languages. He has been a professor emeritus at the University of Southern California, where he moved from the linguistics faculty to the School of Education in 1994. In addition to his academic work, Krashen has been an active public advocate for bilingual education, reading initiatives, and instructional policies that emphasize comprehension and meaningful input.
Theory and core ideas
Krashen proposed a set of interrelated hypotheses about language learning that have been widely discussed and tested in applied linguistics and language pedagogy. These ideas emphasize naturalistic, comprehension‑based learning over explicit grammar drilling. His major hypotheses are:
- Acquisition–learning distinction: a separation between subconscious 'acquisition' through meaningful use and conscious 'learning' of formal rules.
- Monitor hypothesis: the notion that conscious knowledge can only edit or monitor language output under certain conditions.
- Natural order hypothesis: grammatical structures are acquired in a generally consistent sequence.
- Input hypothesis (i+1): learners advance when they receive comprehensible input that is slightly beyond their current level.
- Affective filter hypothesis: emotional and motivational factors can facilitate or block language intake.
Publications and classroom influence
Krashen's ideas were presented in influential books and articles during the 1970s and 1980s and continue to shape teaching practice. Notable works include Principles and Practice in Second Language Acquisition and The Natural Approach (coauthored with Tracy Terrell). He has also promoted the value of free voluntary reading (FVR) as a way to build vocabulary, grammar, and literacy through extensive, meaningful exposure to texts.
Applications and impact
Krashen's theories have informed approaches that prioritize comprehensible input, content‑based instruction, and reading for pleasure. Many language programs emphasize listening and reading activities that supply rich, understandable input rather than isolated grammar instruction. His advocacy extends to bilingual education policy and efforts to increase access to books and reading time for students.
Debate and legacy
While Krashen's hypotheses provoked substantial research and some criticism — particularly about the roles of explicit instruction and corrective feedback — his work remains a cornerstone of second‑language acquisition discussion. Educators and researchers continue to reference and test his ideas, and his public advocacy has linked research findings with educational policy. For more on his academic affiliation and early linguistics appointments, see the USC linguistics department.
Questions and answers
Q: Who is Stephen Krashen?
A: Stephen Krashen is a linguist and educational researcher who is a professor emeritus at the University of Southern California.
Q: What is his field of expertise?
A: Stephen Krashen specializes in linguistics and educational research.
Q: Where did he work and what department did he move to?
A: He used to work in the USC linguistics department but moved to the School of Education in 1994.
Q: What other roles does he have besides being a professor?
A: Stephen Krashen is also an activist and works hard to support bilingual education.
Q: What kind of support does he provide for bilingual education?
A: The text does not provide specific information about the kind of support he provides for bilingual education.
Q: What is his current status at USC?
A: Stephen Krashen is currently a professor emeritus at the University of Southern California.
Q: What is an emeritus professor?
A: An emeritus professor is a retired professor who has been granted the title of professor emeritus as an honor for their contributions to the university.
Author
AlegsaOnline.com Stephen Krashen — Second‑Language Acquisition Theorist and Education Advocate Leandro Alegsa
URL: https://en.alegsaonline.com/art/131234