Hand preference as related to development and behavior in infancy. 
55 healthy infants were assessed for their developmental and behavioral patterns at the age of 9 mo.  Hand preference was assessed at 20 mo.  of age.  The distribution of hand preference showed 12 were right-handed, 11 left-handed and 23 ambidextrous.  This distribution appears shifted more to the left than that reported for older children.  Although their data were based on different tests not appropriate for 9-mo.-old infants, ambidexterity appeared to reflect part of the hand-preference continuum.  No significant relationship between hand preference and developmental attainments was noted.  Perhaps a larger sample would provide a clear developmental behavioral pattern and hand preference in infancy.