What is functional communication training?

Functional communication training (FCT) is an effective, evidence-based method to teach individuals how to replace inappropriate problem behavior with appropriate, recognizable, functional forms of communication.  The method of functional communication depends on the ability of the individual and typically uses either spoken language, American Sign Language (ASL), or the Picture Exchange Communication System (PECS). A few examples of functional phrases include “Help me”, “I’m hungry”, “I want ___”, “Pick me up”.  

Reference:

Tiger, J. H., Hanley, G. P., & Bruzek, J. (2008). Functional communication training: a review and practical guide. Behavior analysis in practice, 1(1), 16–23. doi:10.1007/BF03391716