by BobbyS » February 8th, 2011, 1:49 pm
Agreed. Get your subject to associate the trigger with other autonomous responses.
I'd say it will still need several sessions to keep the trigger 'active' for a decent period of time, and without reinforcement it will (as with all suggestions) eventually fade, but as long as you're honest with your expectations, you should be able to make a trigger pretty much a reflex.