trained test supervisors interviewed all children and adolescent. We used a Questionnaire
that included the Edinburgh Handedness inventory and several Question about gross and fine motor practice. We assessed hours of extracurricular fine motor activity per week
of extracurricular muscular energy consuming activity. and of playing computer games furthermore,we assessed whether subjects performed activities that required parallel hand
movement
all data on gross and fine motor practice are based on the subjects self assessment Reliability and validity of our questionnaire was not tested. Edinburgh handedness
inventory determines a laterality score between 100 i.e maximal lateralized left hander and 100 i.e maximal lateralized right hander.