[nauticalrich]

Let me tell you what''s worked for me: NOTHING!
What I noticed about my wife is that she drifts off looking at something else. If she looks at something to the right she turns the wheel to the right. Then wonders why the sails are flapping or we tacked.
She has her masters degree but boy oh boy, you put something in her hands and she doesn''t know what to do with it. Well almost.

However, we gave up yelling. I sail the boat on a close reach and on a run. She gets the other positions of which she can handle better. Then she feels better about herself.
Will never give up trying though. Stay calm and if that doesn''t work, throw her over the side.