I have a 10 year old daughter who has been having behavioral issues. She is a wonderful student, very smart, and generally very well behaved and respectful when at school. However, when she comes home, she is like a different child. We have had issues with her "stealing" from us...she has taken jewelery, makeup, nail polish, and money from us. She gets caught, denies it for about an hour, then finally admits to it. She apologizes and swears it will not happen again and it always does. She will even go into the kitchen and take food, even when asked not to and told to ask permission for snacks. She gets three meals a day and two snacks in the day, so she is never hungry. She will go and take an entire box of snack cakes, steal whole boxes of cereal, and sneak to her room to eat it. She will lie to her father and I,and then in the next breath, deny that she even said the lie. She lies A LOT, even about the most minor things. She sneaks around the house during the night or early in the morning doing things she is not supposed to...most recently, she came downstairs and unwrapped and rewrapped every since Christmas present. When confronted, she again lied over and over again. She is also extremely defiant in other ways. If she is in trouble and asked to go upstairs, she will cross her arms and say "No" or go upstairs only to return in just a few minutes. Every night is an argument. We have tried escorting her out of the room and marching her upstairs, but she will throw herself in the floor screaming and grabbing her arm, telling us that we "hurt" her arm. We have tried every type of punishment we can think of (taking things away, grounding, time outs, extra chores), as well as trying a reward system (If you do this, then we can go here, or rent a movie, or play a game together.) Nothing seems to work. We are at our wits end with this and there is a constant tension in our home with all the arguing, defiance, and rebellion. This behavior has went on for the past two years, only very recently getting to the point where it is a daily occurrance. She was taken to a psychiatrist last year, who seemed to have no explanation other than "sometimes kids lie and are sneaky." We just do not know what to do anymore. We have tried talking with her calmly, and it does nothing. Please help!