Developmental quotients, measured on the Griffiths' scales, of 114 preterm infants of less than 34 wk gestation are compared with abnormal neurological findings at 1 yr of cerebral palsy, dystonia, and motor delay. The developmental quotient (DQ) uncorrected for prematurity more readily distinguishes the abnormal infant than the corrected DQ. It is recommended that while developmental follow-up still uses scales originally standardised on older preterm and full-term infants the uncorrected developmental quotient is also used. Ideally normative data on the preterm infant should be compiled as a basis for assessing development in these infants.