Real existence of infancy behavioral difficulties
Excessive and persistent cry. 10% of babies in the second semester of life
Sleeping difficulties(sleep onset and frequent waking): 20% of infants
Feeding difficulties. 20% of infants
(diminished appetite, sucking, chewing, deglutition problems, maturation of ability to eat)
(Papousek.Wurmser. Zuckerman. St. James Roberts. Ramsay. Wolke. Wilensky)