Claire was obsessed with video tapes. She carried a very large sports duffel bag, full of video tapes everywhere she went. Claire was very obsessive about the video tapes, if they were taken away, the results were severe. The fits of rage often led to banging her head on the floor or wall.
To modify this behavior, the bag was gradually scaled down. The reduction in the size of bag, was only accomplished through offering Claire something she really loved. In this case, it was ice-cream. Claire was told that she could take as many videos, as would fit in the smaller bag, even if it didn‘t zip. When she had the bag full, and could leave the others behind without getting upset, then she could go for ice-cream.
It took Claire almost a week before she accepted the modification that had been offered. Immediately upon her consent, she was taken for ice cream. With continually modifying the size of the bag, by the end of the year, Claire was down to one video tape carried in a small purse, and no other concessions had to be made.