We propose this book as a celebration of the outstanding research and teaching career of Professor Barbara Coleman Etzel. The editors and authors are her students and her worldwide colleagues. She directed us toward the issues of antecedent control at a time when we thought altering consequences could solve all problems. She developed a model of how a preschool teaching and research laboratory should be run by creating the very environmental controls evident in her work. This book is testimony to her influence on our professional careers and to our affection for her. Analysis of the way the...