Cause and effect – it isn’t always obvious which is which. In archery, they are often confused. When looking at any aspect of shooting technique it is important to know why something happens the way it does. How many people do you see snatching their hands behind their heads as a separate movement after release? Somebody has probably told them they need to pull their hand back behind their ear when they let go, so that’s what they do. What should happen is that the hand moves back of its own accord (effect) because there is a steady pull from the shoulder and the string suddenly isn’t resisting any more (cause).
Here’s another one: current thinking is that correct use of the shoulder muscles through the draw (cause) should result in a slightly curved path of the drawing hand (effect). Making the hand go through a curve is not the same thing.
Focus on the cause, and the effect is a sign that you have got it right. It doesn’t work the other way round. Forcing the effect doesn’t make the cause happen!