Can you believe that my four articles on reaction, learning, behavior, and results were printed in T+D more than 50 years ago?
Immediately, they began to get the attention of workplace trainers. Some called them the "four levels" while others named them the "Kirkpatrick Model" for evaluating training programs.
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They were based on my 1954 PhD dissertation at the University of Wisconsin - research I had done between 1954 and 1959. In 1959, Bob Craig, then editor of T+D, asked