This study evaluated the effects of using differential reinforcement of other behavior (DRO) with a differential reinforcement of alternative behavior (DRA) resetting time schedule to reduce stereotypy in a child with Rett Syndrome. The primary purpose of the investigation was to compare latency and choice as dependent measures to identify reinforcers for use within a DRO/A contingency using a resetting time schedule. The treatment contingencies were arranged to decrease the rate of stereotypy and increased functional play skills. Overall, our results support the use of latency to respond as a dependent measure for selecting reinforcers. (Contains 4 figures.)