Chapter 1
The Four Levels in the 21st Century
In 1954, at the University of Wisconsin in Madison, I (Don) completed my PhD dissertation entitled "Evaluating a Human Relations Training Program for Supervisors." Based on the dissertation, I wrote a series of four articles for T&D of the American Society for Training and Development (ASTD): "Evaluating Reaction," "Evaluating Learning," "Evaluating Behavior," and "Evaluating Results." At that
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