Summary On the basis of 75.5 per cent returns of questionnaires sent to mothers who gave birth to normal full-term babies in an upstate New York hospital during the year 1958, 57 children were identified by mothers as head bangers (15.2 per cent of the sample). Of these 44 were boys and 13 were girls. In addition to the children who were head bangers 46 were crib rockers only.