Larry McDonald wrote: ↑
Sat Sep 30, 2017 12:10 am
Beginners through early advanced [level 7-8 on the RCM scale] should examine their hands regularly, preferably through video.
As Larry implies above, the key distinction is whether one is "examining" their hands or simply peering away at them mindlessly or with little purpose.
It is difficult to examine the hands carefully by looking directly at them while playing, the view is limited and one can't get the whole picture. It is better to have the perspective of an observer, e.g. by using video, having a teacher, having a teacher who is using video...
I often find with beginners that they form a habit of looking at the fretting hand and that this provides little to no technical or musical value. However if the student has the means to examine
their hands - preferably through video - then do it, it is very effective.
Aguado states in his new method (nearly 200 years ago) - that looking to the hands should only be done in a minimal way when in the initial stages of learning a finger position or movement. He asserts that once the movement is learnt don't look anymore - rely instead on your sense of hearing to ascertain whether "any sound is not clear". And, if you must look - use a mirror instead. Perhaps 19th century version of video?