Editing Selective mutism (section)

===Mystery motivators===
Mystery motivation is often paired with self-modeling. An envelope is placed in the child's classroom in a visible place. On the envelope, the child's name is written along with a question mark. Inside is an item that the child's parent has determined to be desirable to the child. The child is told that when they ask for the envelope loudly enough for the teacher and others in the classroom to hear, the child will receive the mystery motivator. The class is also told of the expectation that the child ask for the envelope loudly enough that the class can hear.<ref name="Kehle Madaus Baratta Bray 1998"/><ref name="Shriver Segool Gortmaker 2011"/><ref name=Anstendig1998>{{cite journal |last1=Anstendig |first1=Karin |title=Selective mutism: A review of the treatment literature by modality from 1980–1996. |journal=Psychotherapy: Theory, Research, Practice, Training |date=1998 |volume=35 |issue=3 |pages=381–391 |doi=10.1037/h0087851 }}</ref>