This is an interesting topic because it relates to motivation, which is a very complex concept. There are ways to use these types of "rewards" appropriately, and then there are ways (as some of you have noted) that are problematic. There is a risk with a bribe of it being a one time motivator, pushing someone before they are ready, and so there is more damage in the long run if it freaks a kid out. There is another risk that when you take the bribe/reward away, that the person no longer wants to do the task. I think there is a difference between that and celebrating progress (for example, a week in a row of doing the skill) or accomplishing a goal that is set (and one that has a plan of action to work toward). Some kids will be motivated by extrinsic motivators (which can be $, Starbucks, new clothes, etc. but this can also be positive praise/feedback/recognition). In some circumstances, these can be helpful, but the idea would be to help the individual develop their own intrinsic motivation, which is doing it because you enjoy it, you want to see progress, etc. So, I'd say when used appropriately, rewards can be useful, but often times those "typical bribes" we think of can have negative consequences (either short-term or long-term).
