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The article presents a paper that describes a four-year follow-up study on the influence of serum bilirubin levels upon the ultimate development of low birthweight infants. First, zero order correlations were computed between all nine variables for each of the sexes and for the entire group. There were no striking correlations between the peak serum bilirubins and the examination at three and fours years of age. Second, the infants were divided into those with peak bilirubin levels above and below 18 mg per cent. There was no significant difference in the examinations carried out at 3 and 4 years between the two groups.

Effects of medical, family, and scholastic conditions were evaluated for the number and type of offenses and test score performances in 1,962 urban delinquents. Conditions were evaluated using multivariate followed by univariate analysis of variance with post-hoc tests. There were subgroup differences in the number and type of offenses and test score performances. Also, interactions of medical, family, and scholastic conditions changed the number and type of offenses and lowered test scores. Findings supported a developmental biopsychosocial model of delinquency that emphasized the predominance of medical/scholastic conditions. Orphaned or one-parent delinquents with nervous system or neonatal conditions, retardation, or hyperactivity committed assault.