The presentation was using the S-CAT method (Social Communication Anxiety Treatment). One of the neatest things that I saw at the conference and had never thought of was to have the kids let you know how scary an activity is. Now, this chart would be used with a kid who has begun to use some verbal communication and is slowly overcoming selective mutism. After each activity, you have the child point to the scary chart and let him/her tell you how scary an activity is. This allows the child to realize that a communication activity (whether is verbal or nonverbal communication) is not as scary as they thought. It also gives the therapist feedback to know if the child is ready for that activity or not.
This chart could also be adapted and used with kids who are dysfluent. The pictures could depict how the child feels about a particular speaking task and their stutters.
This is just a quick chart that I made up. Feel free to print off the pdf version here or make your own!