We have an 8 year old thumb sucker. She has slowed down a lot, but no great decisions to stop.
An interesting read: http://www.psychologytoday.com/blog/resolution-not-confli...
We never shame our daughter about her thumb sucking, just remind her. Sometimes we poke at her in fun and we all stick our thumbs in our mouth and she will laugh and stop.
After reading the article, I am guilty from time to time of saying, "Because I said so". The because I said so comment comes after some silly questions at 8 years old of, "Why". By this time, we have explained and asked her to stop, so to ask why is just a beg for such a response.
What helped the most is the socks. We never put tape on the sock. I recall reading some article about a foster parent taping a boys hand because he was a thumb sucker. He lost circulation and lost the thumb.
If she is on the couch, chances are, she has a sock on her hand. She prefers one hand, so only one sock is needed.
After a hard work out on the ice, she has been known to put a stinky hockey sock on her hand.
Sometimes she tries and sometimes she doesn't. We just ask her to stop and if she is caught more than once, we tell her to do something about it. Most often, nothing more said.
Earlier today in the car, I had to ask her to remove her thumb. I just checked on her and she fell asleep without it. I can't put any rhyme or reason to it other than she sucks her thumb when she is sleepy and perhaps tonight she was too sleepy to place it in her mouth. No telling!
Back to the article, it talks about the preschool aged children who comfort themselves and are independent. I have never viewed my daughter as being independent. Most often she would like me to accompany her for nearly everything. She is shy. On the flip side of this, she has a friend who still bangs her head when she is upset. Thankfully, daughter was never much of a headbanger. So considering the two, I will take the thumbsucker.
I always read it takes 20 days to make/break a habit. I thought this would be true, but hasn't proven to be so far. At some point, she did make a promise to herself to stop, then started again said she just changed her mind.