I would take it one step further by putting leather or moleskin on the shelf, fletch up some feathers, lower the nocking point, and re-tune shooting off the shelf.
Al
Amen to this, especially if you are not using a release and shooting fingers.
my wife learned on her compound instinctive, i tried putting sights on for her once and she just could not get used to 'em.
a consistent anchor point is definitly critical.