Acknowledgments

We are grateful to all authors for contributing the book chapters of this volume. We would like to thank the book series editors, John Norris and Sara Cushing for their ongoing feedback and support. Earlier versions of book chapters have benefited from reviews by colleagues in the Research and Development Division at ETS, organized by Kim Fryer. We thank the following colleagues for their insightful comments during the review process: Brent Bridgeman, Tim Davey, Richard J. Tannenbaum, Katherine Hille, Ikkyu Choi, Larry Davis, Henry Yoo. We would like to acknowledge the contribution of our retired colleague Susan Nissan, who was a member of the core R&D team for the TOEFL vertical linking project reported in Chapters 2, 3, and 4. We also thank our ETS business colleagues for their support of the research projects reported in Chapters 2 through 8.