... boys and 20 girls with a mean age of 4years by videotaping them every morning during free play in the classroom during 4 months. They found that higherlevels of testosterone were associated with ... always been very quiet, however, sincethe beginning of 2002 he had started withdrawing himselfmore and more from social interactions, both at homeand in school. To obtain standardized ratings ... child and adolescent psychiatry. Atpsychiatric examination, January 2003, we saw a boy whowas anxious and withdrawn, had problems in social inter-action, and a delayed speech development....