An advantage of using the candy to praise them is that they will always accept the praise, rather than running away saying you are nagging them. I find this especially helpful if I have tried and tried to get a person to do something like clean up after a meal. When they finally give in and do it, if I praise them with the green glove and they run away, it is very hard to get them back at the task. If I use the candy, they continue and complete it.