Consistent with the findings of Chamberlain et al., children with elevated PDR ratings and children living with nonrelative foster parents had significantly higher levels of negative placement disruptions. The study's prediction improved with the use of decisionmaking rules that relied upon increased amounts of weekly PDR information; however, good prediction was achieved with 3-5 weeks of PDR information. Assessing parent-reported stress associated with a foster child's behavior did not improve prediction. The authors discuss the potential applications of the PDR for improving the timing, type, and quantity of services offered in helping foster parents prevent placement disruptions. The study included foster parents of children involved in a recent foster placement who were also participating in the KEEP parenting program. These foster parents completed 16 weekly PDRs on the behaviors of the foster children in their care during the KEEP intervention. The foster parents were also asked about their stress that stemmed from the child's behaviors. Potential improvements in the prediction of negative placement changes were tested for multiple strategies, including latent class analysis of weekly PDR counts and continuous moving averages of PDR counts over shorter time frames. 4 tables, 1 figure, and 40 references