Functional communication training (FCT) is an effective procedure to teach a functional communication response (FCR) and decrease problem behavior. However, there are limitations to FCT. These limitations include excessive manding (e.g., requesting items at a high rate) and manding at inappropriate times (e.g., requesting attention when caregiver is driving). Multiple schedules using static signals (e.g., colored cards) have been used to decrease these limitations while maintaining appropriate levels of the FCRs and low levels of problem behavior. Moreover, dynamic signals have been used to maintain low levels of problem behavior and appropriate levels of alternative responses outside of a multiple schedule format. Presently, no research has examined the comparison of static and dynamic signals to address the limitations of FCT. Therefore, the purpose of the current study is to compare the effects of static and dynamic signals (i.e., Time Timer®) during multiple schedules consisting of reinforcement and extinction components following FCT. Key words: functional communication training, multiple schedules, static signals, Time Timers®