IHC Proctors take note!  When you review the process video of field workers, research shows it is important to go slow with correction.  Per the book, Make It Stick, Harvard University Press:

“In motor learning, trial and error with delayed feedback is a more awkward but effective way of acquiring a skill than trial and correction through immediate feedback; immediate feedback is like the training wheels on a bicycle: the learner quickly comes to depend on the continued presence of the correction.”