Stephen Krashen is an expert in linguistics and language acquisition. He proposes five main hypotheses for second language acquisition: 1) Acquisition requires meaningful interaction and communication, not conscious grammatical rules or drill; 2) Acquired language is used for communication while learned language is used as an editor; 3) The natural order hypothesis states that grammatical structures are acquired in a predictable order; 4) The input hypothesis states that acquisition requires comprehensible input at one level beyond a learner's current ability; 5) The affective filter hypothesis suggests that factors like motivation, anxiety, and self-confidence play a facilitative role in acquisition.

1. Presentation by: Furagganan, Garcia, Lorenzo

2. "Language acquisition does not require extensive use of
conscious grammatical rules, and does not require
tedious drill." Stephen Krashen
"Acquisition requires meaningful interaction in the target
language - natural communication - in which speakers
are concerned not with the form of their utterances but
with the messages they are conveying and
understanding." Stephen Krashen
"In the real world, conversations with sympathetic
native speakers who are willing to help the acquirer
understand are very helpful.” Stephen Krashen

3. Stephen Krashen (University of
Southern California) is an expert in
the field of linguistics, specializing in
theories of language acquisition and
development. Much of his recent
research has involved the study of
non-English and bilingual language
acquisition. During the past 20 years,
he has publishedwell over 100 books
and articles and has been invited to
deliver over 300 lectures at
universities throughout the United
States and Canada.
Krashen's widely known and well
accepted theory of second language
acquisition has had a large impact in all
areas of second language research and
teaching since the 1980s.

4. Krashen's theory of second language acquisition
consists of five main hypotheses:
 the Acquisition-Learning hypothesis,
 the Monitor hypothesis,
 the Input hypothesis,
 the Natural Order hypothesis,
 and the Affective Filter hypothesis.

5. Acquisition-Learning
Hypothesis
Acquisition
Subconscious
process
Learning
Formal instruction
Monitor Hypothesis
Acquisition: utterance
Learning: monitor/editor
Natural Order
Hypothesis
Acquisition of
grammatical structures
follows a ‘natural order’
which is predictable
Input Hypothesis
Only acquisition
Comprehensible input:
i+1
Affective Filter
Hypothesis
Facilitative but non-causal role:
Motivation, self-confidence and anxiety
Over-users: fluency
sufferers
Under-users:
accuracy sufferers
Optimal users:
balanced
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6. References:
http://www.sk.com.br/sk-krash.htm
https://www.thinglink.com/scene/40375
694672684646