Retrospective studies of the intellectual performances of children who later became psychotic adults have yielded evidence of early interference in the development of intelligence in future schizophrenics. The intellectual assessments of 153 children were examined during two test periods in the St. Louis Risk Research Project. In 1967-1972, the…

This study investigated the specific learning abilities and general adjustment of 50 children, 5-14 years of age, who had pyloric stenosis (PS) in infancy, compared to 44 siblings and 50 matched control children. PS involves a period of brief starvation in early infancy, unrelated to socioeconomic conditions and is surgically correctable. The…