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Book

EVALUATION THEORY TREE REVISITED

We first mentioned the idea of an evaluation theory tree to Bob Stake. He told us that a number of years ago, he had students create a classroom project in which they built an evaluation mobile. Imagine Ralph Tyler or Donald Campbell each having important places at the top of this mobile, with pieces of string connecting to other theorists floating in space, often connected in a horizontal fashion with others who influenced them, all the while dangling in space and constantly moving. The image is most intriguing, but clearly, although it is possible to do this in a classroom, it is not something that is easily depicted on paper. We laud the idea, however, of thinking systematically about the relationships between evaluation theorists. Clearly, Bob demonstrated a high level of ingenuity—something that has been consistent in all his work. When Alkin (2002) presented the idea of an evaluation theory ...

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