Certain meta-cognitive skills are needed for a researcher. The model (Fig 1) contains 9 conceptual spaces and the root cause, what is the change in mind.
This model contains theory level, system level and practical level. Each of them require knowledge, formulation and evaluation. According to the definition of Nuller, creativity is defined as a tuple (knowledge, imagination, evaluation).
This concept (Fig 2) is the highest level approach for meta-learning: to understand the level and how to tackle the most relevant challenge in it.