1877
Adolf Kussmaul described "aphasia voluntaria." It was the first time selective mutism had been described in the literature.(Die Störungen der Sprache. Versuch einer Pathologie der Sprache)
1934
Moritz Tramer used the term "elective mutism." (Elektiver Mutismus bei Kindern)
1973
Stina Hesselman suggested the term "selective mutism." (Selektiv mutism hos barn)
1980
DSM-III was published. It included "Elective Mutism."
1991
Selective Mutism Foundation was founded in the US. Pioneers of non-profit organization of selective mutism.
1992
Selective Mutism Information and Research Association was founded in the UK.
1994
DSM-IV was published. The name "elective mutism" was changed into "selective mutism."
1999
The Selective Mutism Group was founded in the US.
