About Gretchen Van De Walle Books by Gretchen Van De Walle An Invitation to Cognitive Science Visual Cognition edited by Stephen M. Kosslyn & Daniel N. Osherson contributions by Harold Pashler, Martha J. Farah, Melvyn Goodale, Eileen Kowler, Grant Gutheil, Elizabeth S. Spelke, Gretchen Van De Walle, Irving Biederman, Fred Dretske, Zijiang J. He, Ken Nakayama & Shinsuke Shimojo