When we took DD4.5 for her testing (SB-V and WIAT-II), we told her that she was going to see the "learning doctor" and that she would be asked questions, play some games, etc. so that the "learning doctor" could see how she best learns. DD is sometimes apprehensive (at least initially) in new situations, but the educational psychologist made her feel very comfortable from the start, and it turned out to be a great experience for her; in fact, she sometimes still mentions that she would like to go back to visit the "learning doctor"! Other than that, we just tried to make sure that she got a good night's sleep and ate a good breakfast beforehand--I don't think that there is really another way to "prepare" for such testing...
GOOD LUCK!
