Right. I suspect the colloquial use keeps "learning" on the y-axis but has "progress" on the x-axis, instead of "training". That is, the psychologists consider

Right. I suspect the colloquial use keeps "learning" on the y-axis but has "progress" on the x-axis, instead of "training". That is, the psychologists consider learning a function of training, whereas others consider achievable work a function of learning.