This paper analyses the clinical picture in 80 children referred to the Park Hospital, Oxford, or to the Newcastle department of child psychiatry, and admitted for intensive assessment of their psychosis. All were seen by two psychiatrists and nearly three quarters of them in Oxford. The diagnostic criteria, and the differentiation by age of onset into infantile psychosis (I.P.) and late onset psychosis (L.O.P.) were discussed in the previous paper (Kolvin, I).