This collection examines the promise and limitations for computer-assisted language learning of emerging speech technologies: speech recognition, text-to-speech synthesis, and acoustic visualization. Using pioneering research from contributors based in the US and Europe, this volume illustrates the uses of each technology for learning languages, the problems entailed in their use, and the solutions evolving in both technology and instructional design. To illuminate where these technologies stand on the path from research toward practice, the book chapters are organized to reflect five stages in the maturation of learning technologies: basic research, analysis of learners’ needs, adaptation of technologies to meet needs, development of prototypes to incorporate adapted technologies, and evaluation of prototypes. The volume demonstrates the progress in employing each class of speech technology while pointing up the effort that remains for effective, reliable application to language learning.
Author(s): Meliss Holland
Edition: 1
Year: 2007
Language: English
Pages: 270
Book Cover......Page 1
Title......Page 4
Copyright......Page 5
Contents......Page 6
List of Figures......Page 8
List of Tables......Page 14
1 The Path of Speech Technologies in CALL: Tracking the Science......Page 16
Section I: Sampling the Research Base......Page 34
2 Applications of Technology to Language Acquisition Processes: What Can Work and Why......Page 40
3 Applications of Formant Detection in Language Learning......Page 59
Section II: Analyzing Needs......Page 82
4 Perceptual Underpinnings of Automatic Pronunciation Assessment......Page 86
Section III: Adapting Speech Technology......Page 100
5 Visualization of Speech Patterns for Language Learning......Page 106
6 Speech Synthesis for Language Tutoring Systems......Page 138
Section IV: Developing Prototype Systems......Page 166
7 Design Features of Three Computer-Based Speech Training Systems......Page 170
8 Logic and Validation of a Fully Automatic Spoken English Test......Page 189
Section V: Evaluating Systems......Page 210
9 4-Month Evaluation of a Learner-Controlled Reading Tutor That Listens......Page 216
10 Balancing Learner and Tutor Control by Taking Turns: Faster and Better Mixed-Initiative Task Choice in a Reading Tutor That Listens......Page 235
Contributors......Page 256
Index......Page 262
