On 14 Apr, 20:24, 'Kate wrote:
http://www.cnn.com/2007/HEALTH/paren...eut/index.html

A short synopsis - there's a shyness gene but parents' reactions to the
child (sensitivity and nurturance) and the support that a parent receives
for his/her own stresses can override genetic influence by "rewiring" the
child to tolerate stress and novel situations.

Very interesting link Thank-You, made me think about ADD a lot
more carefully