The professors’ findings were published in a case study in a special edition of Behavioral Sciences: Approaches to Overcoming Selective Mutism in Children and Youths. The article is titled A Physiological Approach to Vocalization and Expanding Spoken Language for Adolescents with Selective Mutism. (Klein & Ruiz, 2025). Their progress underscores the importance of therapy using an approach that integrates vocal control and pragmatic language,” Klein and Ruiz said in the case study. A Physiological Approach to Vocalization and Expanding Spoken Language for Adolescents with Selective Mutism.