listing in my last book, the principal influences are from James Farber, Thomas Lom-
bardo, Harold Sedgewick, and Anthony Barrand. I also had a very early student who
has become a contemporary as the years pass, Mary Henle. I thank all of them from
the bottom of my heart.

There are several friends and colleagues who are pushing ahead with the ecological
approach to psychology without having been my students. It would seem that they
believe in it without persuasion. Robert Shaw, William Mace, Michael Turvey, and
David Lee are scrambling through the underbrush along with me, and I am grateful
for their company. So are Edward Reed and Rebecca Jones, who compiled the index.

This book has been written and revised in pieces over a period of ten years. So
many helpful persons have read and criticized these pieces that I can only thank them
as a group. But I am especially indebted to William Mace, Trinity College, Jacob Beck,
University of Oregon, and Michael Turvey, University of Connecticut, for their criti-
cisms of the final manuscript.

Above all there is the Susan Linn Sage Professor of Psychology at Cornell who
worked very hard on this book, even if she did not write it. She is married to me, and
we share responsibility for important decisions. Any errors in this book that remain are
her fault as much as mine.

J. J.G.

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