Handedness is the preferred use of the right hand, the left
hand, or one or the other depending on the task.   Handedness is
defined and categorized in different ways. Most people define
handedness as the hand that one uses for writing. Within the
scientific community some researchers define handedness as the
hand that is faster and more precise for manual tasks. Others
define it as the preferred hand, regardless of its abilities.
Whereas some people always use their right hand or their left
hand for most activities, others use one hand or the other
depending on the activity. Still other people can use either
hand for most functions.  Lefthanders usually prefer using their
left hand for delicate tasks; however, there is no good method
for predicting which hand a lefthander will choose for a
specific task. Although left-handed children usually are more
flexible in their hand usage than right-handers, this may be
because they are forced to function in a world designed for
right-handers.  There is no standard me