What do Mental Effort and Familiarity tell about my mind?
Mental Effort measures the mental workload while performing a task. The harder you (your brain) work on a task, the higher the value. It could tell you many things such as – is your brain having a difficult time with the task?
Familiarity measures the process of learning while performing a task. For some cases, it reflects how well you are doing with the task. By observing trends, you can better understand your own learning process.
Both of them could be applied on tasks that are physical (e.g. drawing) or mental (e.g. recitation) in nature.