This study assessed cognitive processing speed among full-term and preterm infants when they reached 5, 7, and 12 months of age. Findings indicated that at all ages, preterms required about 20 percent more trials and 30 percent more time than full-terms to reach criterion on a novelty preference task. Among preterms, slower processing was associated with greater medical risk. Developmental trajectories for speed and attention were similar for both groups. (Author/KB)