May I ask about the four-level model of evaluation? I wonder why both learning and reaction could be considered as evaluating the performance of participants? What is the difference between reaction and learning?

No worries

Got it! Thanks so much for your introduction!

Reaction in the four-level model is measured by a survey of participants’ satisfaction with the program, while learning is measured via interviews and observations geared towards assessing the degree of knowledge of participants before and after the program implementation.