Which training evaluation model is dominant in both research and practical experience?

A) Kraiger's hierarchical model
B) Kirkland's hierarchical model
C) Gagné's hierarchical model
D) Kirkpatrick's hierarchical model

Kirkpatrick's hierarchical model is the dominant model in both research and practical experience. It includes four levels of evaluation: reaction, learning, behavior, and results. This model is widely used in organizations for evaluating the effectiveness of training programs.