SlideShare a Scribd company logo
Input
Comprehension
   Theory
Developed
by
Stephen
Krashen
The Input Hypothesis states
that we acquire language
when we understand
messages, when we
understand what people tell
us, and when we understand
what we read.
We have to receive input
that is just beyond our
competence but not
beyond our
understanding.
Learners have to also have the right
environment and circumstances to allow
comprehensible input to work. A
learner's affective filter
has to be low; they
have to be free of stress
and motivated.
How does the
Theory impact
 Teachers of
 Young ELLs?
• The Comprehension Hypothesis helps us with
  the issue of whether and how to use the
  student’s first language in education. The
  Comprehension Hypothesis predicts that the
  first language helps when it is used to make
  input more comprehensible: This happens
  when we use the first language to provide
  background information. This could be in the
  form of short readings or explanations by the
  teacher before a complex topic is presented.
  Information provided in the first language can
  help the same way pictures can help at the
  beginning level, as context that makes input
  more comprehensible.
• The Comprehension Hypothesis predicts that
  first language use can hurt when it is used in
  ways that do not encourage comprehensible
  input. This happens when we translate and
  students have no need to attend to the
  second language input.
Works Cited
• http://bogglesworldesl.com/glossary/inputhy
  pothesis.htm
• http://www.sdkrashen.com/articles/eta_pape
  r/index.html

More Related Content

What's hot

Listening strategies
Listening strategiesListening strategies
Listening strategies
Ivan Chaverra Pino
 
Listening
ListeningListening
Teaching Lisening Strategies
Teaching Lisening Strategies Teaching Lisening Strategies
Teaching Lisening Strategies
César Narváez Vilema
 
Assessing reading third entry
Assessing reading third entryAssessing reading third entry
Assessing reading third entry
LoRena Peña Florez
 
Listening for main idea & supporting details
Listening for main idea & supporting detailsListening for main idea & supporting details
Listening for main idea & supporting details
Izaham
 
Listening skill
Listening skillListening skill
Listening skill
Hani Suraya
 
Listening vs hearing
Listening vs hearingListening vs hearing
Listening vs hearing
UPM
 
comprehension and levels of comprehension
comprehension and levels of comprehensioncomprehension and levels of comprehension
comprehension and levels of comprehension
marimar27
 
Effective Communication
Effective CommunicationEffective Communication
Effective Communication
abhishekverma7993
 
Components of reading process
Components of reading processComponents of reading process
Components of reading process
Chejay Jakosalem
 
Relationship listening and critical listening
Relationship listening and critical listeningRelationship listening and critical listening
Relationship listening and critical listening
Michellane Riparip
 
Intro To Comprehension
Intro To ComprehensionIntro To Comprehension
Intro To Comprehension
Gayle Underwood
 
Effective Listnening
Effective ListneningEffective Listnening
Effective Listnening
nhabank
 
ENG 3A | Nature of Listening
ENG 3A | Nature of ListeningENG 3A | Nature of Listening
ENG 3A | Nature of Listening
Rizza Mae Samalca
 
Diffrence between Hearing and listening
Diffrence between Hearing and listeningDiffrence between Hearing and listening
Diffrence between Hearing and listening
JayRaj Gadhavi
 
Mindful listening
Mindful listeningMindful listening
Mindful listening
debatemamma
 
Listening
ListeningListening
Listening
Francis Angeles
 
Quick scan
Quick scanQuick scan
Quick scan
Oliver Smith
 
The Impact of Listening
The Impact of ListeningThe Impact of Listening
The Impact of Listening
Cathi Hight
 

What's hot (19)

Listening strategies
Listening strategiesListening strategies
Listening strategies
 
Listening
ListeningListening
Listening
 
Teaching Lisening Strategies
Teaching Lisening Strategies Teaching Lisening Strategies
Teaching Lisening Strategies
 
Assessing reading third entry
Assessing reading third entryAssessing reading third entry
Assessing reading third entry
 
Listening for main idea & supporting details
Listening for main idea & supporting detailsListening for main idea & supporting details
Listening for main idea & supporting details
 
Listening skill
Listening skillListening skill
Listening skill
 
Listening vs hearing
Listening vs hearingListening vs hearing
Listening vs hearing
 
comprehension and levels of comprehension
comprehension and levels of comprehensioncomprehension and levels of comprehension
comprehension and levels of comprehension
 
Effective Communication
Effective CommunicationEffective Communication
Effective Communication
 
Components of reading process
Components of reading processComponents of reading process
Components of reading process
 
Relationship listening and critical listening
Relationship listening and critical listeningRelationship listening and critical listening
Relationship listening and critical listening
 
Intro To Comprehension
Intro To ComprehensionIntro To Comprehension
Intro To Comprehension
 
Effective Listnening
Effective ListneningEffective Listnening
Effective Listnening
 
ENG 3A | Nature of Listening
ENG 3A | Nature of ListeningENG 3A | Nature of Listening
ENG 3A | Nature of Listening
 
Diffrence between Hearing and listening
Diffrence between Hearing and listeningDiffrence between Hearing and listening
Diffrence between Hearing and listening
 
Mindful listening
Mindful listeningMindful listening
Mindful listening
 
Listening
ListeningListening
Listening
 
Quick scan
Quick scanQuick scan
Quick scan
 
The Impact of Listening
The Impact of ListeningThe Impact of Listening
The Impact of Listening
 

Similar to Input comprehension theory

Natural approach
Natural approachNatural approach
Natural approach
Hasan BİLOKCUOGLU
 
109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will 109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will
BenitoSumpter862
 
109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will 109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will
SantosConleyha
 
Krashen
KrashenKrashen
Krashen
Gladys Rivera
 
The natural approach presentation
The natural approach presentationThe natural approach presentation
The natural approach presentation
JolexM
 
FAMOUS ESL THEORIST
FAMOUS ESL THEORIST FAMOUS ESL THEORIST
FAMOUS ESL THEORIST
cristelsharna03
 
Krashen, five central hypothesis
Krashen, five central hypothesis Krashen, five central hypothesis
Krashen, five central hypothesis
solankipintu
 
Krashen’s theory
Krashen’s theoryKrashen’s theory
Krashen’s theory
Charina Palo
 
Tutorial 3r
Tutorial 3rTutorial 3r
Tutorial 3r
maf681
 
Monitor Model Theory
Monitor Model Theory Monitor Model Theory
Monitor Model Theory
فوفو الدوسري
 
The Natural approach
The Natural approachThe Natural approach
The Natural approach
Salah Saika
 
Natural approach
Natural approach Natural approach
Natural approach
Murat Yıldız
 
Total Physical Response Cpr1[1]
Total Physical Response     Cpr1[1]Total Physical Response     Cpr1[1]
Total Physical Response Cpr1[1]
Tarik Idrissi
 
Total Physical Response
Total Physical ResponseTotal Physical Response
Total Physical Response
ignorantdavinci
 
Affective effective language english language teaching method
Affective effective language english language teaching methodAffective effective language english language teaching method
Affective effective language english language teaching method
Eduardo Hernández Rangel, MCC, PMP, ITIL Cer, Scrum Master
 
El enfoque natural
El enfoque naturalEl enfoque natural
El enfoque natural
Gladys Rivera
 
Ethical Listening-KAYZEL.ppt
Ethical Listening-KAYZEL.pptEthical Listening-KAYZEL.ppt
Ethical Listening-KAYZEL.ppt
KayzelPearlBonganay
 
Motivation
MotivationMotivation
Motivation
ancona
 
Week 4 SPE-MTB-MLE.pdf
Week 4 SPE-MTB-MLE.pdfWeek 4 SPE-MTB-MLE.pdf
Week 4 SPE-MTB-MLE.pdf
MeinradBautista1
 
Theoriesof Firstand Second Language Session1slideshare
Theoriesof Firstand Second Language Session1slideshareTheoriesof Firstand Second Language Session1slideshare
Theoriesof Firstand Second Language Session1slideshare
Andres Atehortua
 

Similar to Input comprehension theory (20)

Natural approach
Natural approachNatural approach
Natural approach
 
109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will 109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will
 
109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will 109Learning OutcomesBy the end of this chapter you will
109Learning OutcomesBy the end of this chapter you will
 
Krashen
KrashenKrashen
Krashen
 
The natural approach presentation
The natural approach presentationThe natural approach presentation
The natural approach presentation
 
FAMOUS ESL THEORIST
FAMOUS ESL THEORIST FAMOUS ESL THEORIST
FAMOUS ESL THEORIST
 
Krashen, five central hypothesis
Krashen, five central hypothesis Krashen, five central hypothesis
Krashen, five central hypothesis
 
Krashen’s theory
Krashen’s theoryKrashen’s theory
Krashen’s theory
 
Tutorial 3r
Tutorial 3rTutorial 3r
Tutorial 3r
 
Monitor Model Theory
Monitor Model Theory Monitor Model Theory
Monitor Model Theory
 
The Natural approach
The Natural approachThe Natural approach
The Natural approach
 
Natural approach
Natural approach Natural approach
Natural approach
 
Total Physical Response Cpr1[1]
Total Physical Response     Cpr1[1]Total Physical Response     Cpr1[1]
Total Physical Response Cpr1[1]
 
Total Physical Response
Total Physical ResponseTotal Physical Response
Total Physical Response
 
Affective effective language english language teaching method
Affective effective language english language teaching methodAffective effective language english language teaching method
Affective effective language english language teaching method
 
El enfoque natural
El enfoque naturalEl enfoque natural
El enfoque natural
 
Ethical Listening-KAYZEL.ppt
Ethical Listening-KAYZEL.pptEthical Listening-KAYZEL.ppt
Ethical Listening-KAYZEL.ppt
 
Motivation
MotivationMotivation
Motivation
 
Week 4 SPE-MTB-MLE.pdf
Week 4 SPE-MTB-MLE.pdfWeek 4 SPE-MTB-MLE.pdf
Week 4 SPE-MTB-MLE.pdf
 
Theoriesof Firstand Second Language Session1slideshare
Theoriesof Firstand Second Language Session1slideshareTheoriesof Firstand Second Language Session1slideshare
Theoriesof Firstand Second Language Session1slideshare
 

Recently uploaded

How to deliver Powerpoint Presentations.pptx
How to deliver Powerpoint  Presentations.pptxHow to deliver Powerpoint  Presentations.pptx
How to deliver Powerpoint Presentations.pptx
HajraNaeem15
 
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumPhilippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
MJDuyan
 
Temple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation resultsTemple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation results
Krassimira Luka
 
skeleton System.pdf (skeleton system wow)
skeleton System.pdf (skeleton system wow)skeleton System.pdf (skeleton system wow)
skeleton System.pdf (skeleton system wow)
Mohammad Al-Dhahabi
 
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
Nguyen Thanh Tu Collection
 
Standardized tool for Intelligence test.
Standardized tool for Intelligence test.Standardized tool for Intelligence test.
Standardized tool for Intelligence test.
deepaannamalai16
 
Bonku-Babus-Friend by Sathyajith Ray (9)
Bonku-Babus-Friend by Sathyajith Ray  (9)Bonku-Babus-Friend by Sathyajith Ray  (9)
Bonku-Babus-Friend by Sathyajith Ray (9)
nitinpv4ai
 
Pharmaceutics Pharmaceuticals best of brub
Pharmaceutics Pharmaceuticals best of brubPharmaceutics Pharmaceuticals best of brub
Pharmaceutics Pharmaceuticals best of brub
danielkiash986
 
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
EduSkills OECD
 
Haunted Houses by H W Longfellow for class 10
Haunted Houses by H W Longfellow for class 10Haunted Houses by H W Longfellow for class 10
Haunted Houses by H W Longfellow for class 10
nitinpv4ai
 
HYPERTENSION - SLIDE SHARE PRESENTATION.
HYPERTENSION - SLIDE SHARE PRESENTATION.HYPERTENSION - SLIDE SHARE PRESENTATION.
HYPERTENSION - SLIDE SHARE PRESENTATION.
deepaannamalai16
 
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptxPrésentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
siemaillard
 
Leveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit InnovationLeveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit Innovation
TechSoup
 
Educational Technology in the Health Sciences
Educational Technology in the Health SciencesEducational Technology in the Health Sciences
Educational Technology in the Health Sciences
Iris Thiele Isip-Tan
 
مصحف القراءات العشر أعد أحرف الخلاف سمير بسيوني.pdf
مصحف القراءات العشر   أعد أحرف الخلاف سمير بسيوني.pdfمصحف القراءات العشر   أعد أحرف الخلاف سمير بسيوني.pdf
مصحف القراءات العشر أعد أحرف الخلاف سمير بسيوني.pdf
سمير بسيوني
 
RESULTS OF THE EVALUATION QUESTIONNAIRE.pptx
RESULTS OF THE EVALUATION QUESTIONNAIRE.pptxRESULTS OF THE EVALUATION QUESTIONNAIRE.pptx
RESULTS OF THE EVALUATION QUESTIONNAIRE.pptx
zuzanka
 
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxBeyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
EduSkills OECD
 
Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
PsychoTech Services
 
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
Nguyen Thanh Tu Collection
 
Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"
Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"
Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"
National Information Standards Organization (NISO)
 

Recently uploaded (20)

How to deliver Powerpoint Presentations.pptx
How to deliver Powerpoint  Presentations.pptxHow to deliver Powerpoint  Presentations.pptx
How to deliver Powerpoint Presentations.pptx
 
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumPhilippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
 
Temple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation resultsTemple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation results
 
skeleton System.pdf (skeleton system wow)
skeleton System.pdf (skeleton system wow)skeleton System.pdf (skeleton system wow)
skeleton System.pdf (skeleton system wow)
 
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
 
Standardized tool for Intelligence test.
Standardized tool for Intelligence test.Standardized tool for Intelligence test.
Standardized tool for Intelligence test.
 
Bonku-Babus-Friend by Sathyajith Ray (9)
Bonku-Babus-Friend by Sathyajith Ray  (9)Bonku-Babus-Friend by Sathyajith Ray  (9)
Bonku-Babus-Friend by Sathyajith Ray (9)
 
Pharmaceutics Pharmaceuticals best of brub
Pharmaceutics Pharmaceuticals best of brubPharmaceutics Pharmaceuticals best of brub
Pharmaceutics Pharmaceuticals best of brub
 
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
 
Haunted Houses by H W Longfellow for class 10
Haunted Houses by H W Longfellow for class 10Haunted Houses by H W Longfellow for class 10
Haunted Houses by H W Longfellow for class 10
 
HYPERTENSION - SLIDE SHARE PRESENTATION.
HYPERTENSION - SLIDE SHARE PRESENTATION.HYPERTENSION - SLIDE SHARE PRESENTATION.
HYPERTENSION - SLIDE SHARE PRESENTATION.
 
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptxPrésentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
 
Leveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit InnovationLeveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit Innovation
 
Educational Technology in the Health Sciences
Educational Technology in the Health SciencesEducational Technology in the Health Sciences
Educational Technology in the Health Sciences
 
مصحف القراءات العشر أعد أحرف الخلاف سمير بسيوني.pdf
مصحف القراءات العشر   أعد أحرف الخلاف سمير بسيوني.pdfمصحف القراءات العشر   أعد أحرف الخلاف سمير بسيوني.pdf
مصحف القراءات العشر أعد أحرف الخلاف سمير بسيوني.pdf
 
RESULTS OF THE EVALUATION QUESTIONNAIRE.pptx
RESULTS OF THE EVALUATION QUESTIONNAIRE.pptxRESULTS OF THE EVALUATION QUESTIONNAIRE.pptx
RESULTS OF THE EVALUATION QUESTIONNAIRE.pptx
 
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxBeyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
 
Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
 
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
 
Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"
Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"
Jemison, MacLaughlin, and Majumder "Broadening Pathways for Editors and Authors"
 

Input comprehension theory

  • 3. The Input Hypothesis states that we acquire language when we understand messages, when we understand what people tell us, and when we understand what we read.
  • 4.
  • 5. We have to receive input that is just beyond our competence but not beyond our understanding.
  • 6. Learners have to also have the right environment and circumstances to allow comprehensible input to work. A learner's affective filter has to be low; they have to be free of stress and motivated.
  • 7. How does the Theory impact Teachers of Young ELLs?
  • 8. • The Comprehension Hypothesis helps us with the issue of whether and how to use the student’s first language in education. The Comprehension Hypothesis predicts that the first language helps when it is used to make input more comprehensible: This happens when we use the first language to provide background information. This could be in the form of short readings or explanations by the teacher before a complex topic is presented. Information provided in the first language can help the same way pictures can help at the beginning level, as context that makes input more comprehensible.
  • 9.
  • 10. • The Comprehension Hypothesis predicts that first language use can hurt when it is used in ways that do not encourage comprehensible input. This happens when we translate and students have no need to attend to the second language input.
  • 11. Works Cited • http://bogglesworldesl.com/glossary/inputhy pothesis.htm • http://www.sdkrashen.com/articles/eta_pape r/index.html