Effects of anxiety, language skills, and cultural adaptation on the development of selective mutism.

Although bilingual children are thought to be at higher risk for selective mutism (SM), little is known about the development of SM in this population. This study investigates the effects of children's anxiety and language skills and parents' cultural adaptation on the development of SM. 15 bilingual (11 mute, 4 speaking at the beginning of the study) and 15 monolingual children (7 mute, 8 speaking at the beginning of the study) between the ages of 3 years and 5 years 8 months were assessed longitudinally over a 9-month period. Children's anxiety and parents' cultural adaptation were examined via parent questionnaires. Receptive language skills were assessed with a standardized test. Every 3 months, parents and preschool teachers reported on the children's speaking behavior via questionnaires. Anxiety best predicted the development of mute behavior. There was no effect of bilingual status on its own. The effect of language skills did not reach significance but was considerably higher in preschool settings in comparison with family and public situations. Results also indicated an association between parents' orientation to the mainstream culture and children's speaking behavior in preschool. Level of anxiety might function as an early indicator of SM, especially in bilingual children, when information on language proficiency is scarce. There is still a need for intensive research in order to further the understanding of the development of SM in bilingual children.