では親はどうしていたのかというと、「子どもは家では普通に話すので、特に警戒心は抱いてこなかった」(None were referred by the parents, who had not been particulary alarmed as the children spoke normally at home.) .というのです。
◇ Black, B., and Uhde, T.W. (1995). Psychiatric characteristics of children with selective mutism: A pilot study. Journal of the American Academy of Child and Adolescent Psychiatry, 34(7), 847-856. ◇ Omdal, H. (2007). Can adults who have recovered from selective mutism in childhood and adolescence tell us anything about the nature of the condition and/or recovery from it? European Journal of Special Needs Education, 22(3), 237-253. ◇ 高木四郎 (1951). 口をきかない子供−事例研究その二−. 児童心理と精神衛生, 1(5), 52-55, 62.