Text Entry Systems - Mobility, Accessibility, Universality

Text Entry Systems - Mobility, Accessibility, Universality

von: I. Scott MacKenzie, Kumiko Tanaka-Ishii

Elsevier Trade Monographs, 2007

ISBN: 9780080489797 , 344 Seiten

Format: PDF, ePUB, OL

Kopierschutz: DRM

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Text Entry Systems - Mobility, Accessibility, Universality


 

Front Cover

1

Text Entry Systems: Mobility, Accessibility, Universality

4

Copyright Page

5

Contents

6

Preface: Variety and Universality

10

Part 1 Foundations

12

Chapter 1 Historical Overview of Consumer Text Entry Technologies

14

1.1 INTRODUCTION

14

1.2 TYPEWRITER, 1870s TO 1980s

15

1.3 PERSONAL COMPUTER, 1980S TO PRESENT

21

1.4 MOBILE PHONES, 1990S TO PRESENT

25

1.5 HANDHELD COMPUTERS

28

1.6 CONCLUSIONS

33

1.7 FURTHER READING

34

REFERENCES

34

Chapter 2 Language Models for Text Entry

38

2.1 INTRODUCTION

38

2.2 BASIC MODEL OF TEXT ENTRY

39

2.3 N-GRAM MODELS

43

2.4 HIDDEN MARKOV MODEL

46

2.5 ADAPTIVE MODELS

49

2.6 CONCLUDING REMARKS

54

REFERENCES

55

Chapter 3 Measures of Text Entry Performance

58

3.1 INTRODUCTION

58

3.2 AGGREGATE MEASURES

59

3.3 CHARACTER-LEVEL MEASURES

71

3.4 MEASUREMENTS FROM LOG FILES

76

3.5 METHOD-SPECIFIC MEASURES

77

3.6 DISCUSSION OF MEASURES

81

3.7 FURTHER READING

82

REFERENCES

82

Chapter 4 Evaluation of Text Entry Techniques

86

4.1 INTRODUCTION

86

4.2 COMPARATIVE EVALUATION OF TEXT ENTRY TECHNIQUES

89

4.3 EXPERIMENT DESIGN

94

4.4 LEARNING

104

4.5 SUMMARY AND FURTHER READING

108

REFERENCES

109

Part 2 Entry Modalities and Devices

114

Chapter 5 Text Entry Using a Small Number of Buttons

116

5.1 INTRODUCTION

116

5.2 MOBILE PHONE KEYPAD AND ENTRY METHODS

118

5.3 CHARACTERISTIC MEASURES FOR AMBIGUOUS KEYBOARDS

120

5.4 MOBILE PHONE KEYPAD VARIANTS

122

5.5 EVALUATING KEYBOARDS

126

5.6 ENTRY BY COMPLETION

128

5.7 SUMMARY AND FURTHER READING

130

REFERENCES

130

Chapter 6 English Language Handwriting Recognition Interfaces

134

6.1 INTRODUCTION

134

6.2 OFFLINE HANDWRITING RECOGNITION

136

6.3 ONLINE HANDWRITING RECOGNITION

137

6.4 SHORTHAND

142

6.5 COMMERCIAL ONLINE SYSTEMS

145

6.6 CASE STUDY

145

6.7 FURTHER READING

146

REFERENCES

146

Chapter 7 Introduction to Shape Writing

150

7.1 INTRODUCTION

150

7.2 THE BASIC CONCEPT OF SHAPE WRITING

150

7.3 INFORMATION AND CONSTRAINTS

151

7.4 SHAPE-WRITING RECOGNITION

153

7.5 OUT-OF-LEXICON INPUT, AMBIGUITY, AND ERROR HANDLING

154

7.6 HUMAN SENSITIVITY TO SHAPE AS AN ENCODING MODALITY AND THE PROGRESSION FROM TRACING TO DIRECT SHAPE WRITING

157

7.7 EFFICIENCY AND LAYOUT MATTERS

159

7.8 THE MULTIPLE DIMENSIONS AND GUIDELINES OF EFFICIENT TEXT ENTRY

162

7.9 FURTHER READING

166

REFERENCES

166

Chapter 8 Speech-Based Interfaces

170

8.1 INTRODUCTION

170

8.2 CATEGORIES OF SPEECH RECOGNITION TASKS

170

8.3 PRINCIPLES OF SPEECH RECOGNITION

172

8.4 DICTATION SYSTEMS AND THEIR DIFFICULTIES

175

8.5 SPOKEN DIALOGUE SYSTEMS AND THEIR DIFFICULTIES

176

8.6 EVALUATION OF SPEECH-BASED INPUT SYSTEMS

177

8.7 CONCLUSION

182

REFERENCES

183

Chapter 9 Text Entry by Gaze: Utilizing Eye Tracking

186

9.1 INTRODUCTION

186

9.2 DIFFERENT APPROACHES TO TEXT ENTRY BY GAZE

187

9.3 CASE STUDIES AND GUIDELINES

192

9.4 FURTHER READING

195

ACKNOWLEDGMENTS

196

REFERENCES

196

Part 3 Language Variations

200

Chapter 10 Writing System Variation and Text Entry

202

10.1 INTRODUCTION

202

10.2 VARIATION IN WRITING SYSTEMS

203

10.3 TEXT ENTRY PROBLEMS IN DIFFERENT WRITING SYSTEMS

205

10.4 ALPHABETIC SCRIPTS

207

10.5 CONCLUDING REMARKS

212

10.6 ACKNOWLEDGMENTS

212

REFERENCES

212

Chapter 11 Text Entry in East Asian Languages

214

11.1 INTRODUCTION

214

11.2 LANGUAGE DESCRIPTION

215

11.3 NONPREDICTIVE METHODS

220

11.4 PREDICTIVE ENTRY BASED ON PHONETICS

223

11.5 PREDICTIVE ENTRY BASED ON SHAPES

228

11.6 ENTRY ON OTHER DEVICES

230

11.7 IDEOGRAM ENTRY SYSTEM FOR NONNATIVES

233

11.8 CONCLUSION

234

REFERENCES

235

Chapter 12 Text Entry in South and Southeast Asian Scripts

238

12.1 INTRODUCTION

238

12.2 CHARACTERISTICS OF AN ABUGIDA

239

12.3 TEXT ENTRY ISSUES

242

12.4 TEXT ENTRY SYSTEMS IN INDIA

246

12.5 TEXT ENTRY SYSTEMS IN THAILAND

251

12.6 CONCLUSION

257

12.7 FURTHER READING

258

REFERENCES

258

Chapter 13 Text Entry in Hebrew and Arabic Scripts

262

13.1 INTRODUCTION

262

13.2 ARABIC AND HEBREW SCRIPTS

263

13.3 STANDARD ENTRY

267

13.4 ENTRY ON MOBILE DEVICES

273

13.5 TOWARD COMPUTER-AIDED ENTRY

276

13.6 CONCLUDING REMARKS

277

13.7 ACKNOWLEDGMENTS

278

REFERENCES

278

Part 4 Accessibility, Universality

280

Chapter 14 Text Input for the Elderly and the Young

282

14.1 INTRODUCTION

282

14.2 OVERVIEW OF AGE EFFECTS

283

14.3 TEXT INPUT FOR THE ELDERLY

287

14.4 TEXT INPUT FOR CHILDREN

290

14.5 CASE STUDY—EVALUATING TEXT INPUT WITH CHILDREN

295

14.6 FURTHER READING

297

REFERENCES

297

Chapter 15 Text Entry When Movement is Impaired

300

15.1 INTRODUCTION

300

15.2 USING KEYBOARDS

301

15.3 ASSISTIVE INPUT TECHNIQUES

301

15.4 ALTERNATIVES TO STANDARD KEYBOARDS

303

15.5 AAC TEXT INPUT

307

15.6 CASE STUDY: DISAMBIGUATION

309

15.7 FURTHER READING

310

REFERENCES

311

Chapter 16 Text Entry for People with Visual Impairments

316

16.1 INTRODUCTION

316

16.2 TEXT ENTRY FOR LATIN ALPHABETS

317

16.3 TEXT ENTRY FOR IDEOGRAPHIC CHARACTERS

319

16.4 SELECTION-BASED TEXT ENTRY INTERFACES

322

16.5 DESIGN GUIDELINES

324

16.6 CONCLUSION

327

RELATED ORGANIZATIONS AND RESEARCH GROUPS

327

MAJOR PRODUCTS

328

REFERENCES

328

Index

330

A

330

B

331

C

331

D

332

E

332

F

333

G

333

H

333

I

334

J

334

K

334

L

335

M

335

N

336

O

336

P

336

Q

336

R

337

S

337

T

338

U

338

V

339

W

339

Y

339

Z

339

About the Authors

340