When called on at school, a seven year old boy will only nod or write in response. The family of the child is surprised to hear from his teacher, because the boys speaks normally when I get home went with his parents. The child has achieved appropriate developmental milestones, and a medical evaluation indicates that he is healthy. The boy is unable to give any explanations for his behavior, but the parents are concerned that it will affect his school performance. What diagnosis best fits this child symptoms
