Millisecond Forums

 Hello,

I am helping develop a study that has two counterbalanced orders.  Children and their caregivers will both becompleting the study.  The experimenter would like for a child and his/hercaregiver to complete the same order.  Each child and parent will be usingthe same Subject ID (ranging from 10003 to 191055, not increasing by one butjumping around).  I would like for assignment to the two orders to berandom, but for the same Subject ID to assign to the same order each time the file is run.  Is this possible?  If not, would the best approach be to get the full list of Subject ID's and create a randomized list of half that are assigned manually to each order?