The study aimed to explore the personalities in terms of anxiety and shyness, behaviors in terms of avoidance behavior and oppositional behavior, and social skills of children with selective mutism. The study also uses peer socialization to explore the changes in children with selective mutism. As a qualitative method of this study, the triangulation approach was used to conduct the four case studies. Four children with selective mutism were chosen as cases. Each teacher of the four children with selective mutism had been interviewed by the researcher. The data of interview transcripts was supported by observation with the children and document analysis. All the data form the initial codes, combine into one narrative, and report according to four themes. The findings show 1) children with selective mutism are high levels of neuroticism regarding shyness, quietness, and anxiety; 2) oppositional behavior only appears when the children first joined to school, however, they pres.....

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