What is Selective Mutism (SM)?
Selective mutism (SM), formerly called elective mutism, is defined as a disorder of childhood characterized by an inability to speak in certain settings (e.g. at school, in public places) despite speaking in other settings (e.g. at home with family). SM is associated with anxiety and may be an extreme form of social phobia according to researchers and clinicians who are familiar with the disorder (Black & Uhde, 1995; Dow et al., 1995, Dummit et al., 1997, Kristensen, 2001; Leonard & Dow, 1995). The fourth edition of the Diagnostic and Statistical Manual of Mental Disorders, referred to by clinicians as the DSM-IV, (APA,1994) recognized that the social anxiety and avoidance characteristic of social phobia may be associated with SM, and thus, both diagnoses may be given. More than 90% of children with SM also meet the diagnostic criteria for social anxiety disorder, now termed social phobia (Black et al., 1996). Diagnosis of other comorbid anxiety disorders are also commonly diagnosed wi
