van Veen S, et al. - In eight-year-old very preterm (VPT) and extremely preterm (EPT) children (n = 120), researchers studied possible differences between verbal IQ and performance IQ and analyzed correlations between verbal IQ and performance IQ, and sociodemographic factors, perinatal factors, early cognitive outcomes and also with school achievement scores. For this prospective cohort study, cognitive development was evaluated at the ages of two, five and eight years. According to results, gestational age, small for gestational age status, and cognitive scores at the ages of two and five years predicted verbal IQ and performance IQ at eight years of age significantly. An important predictor for arithmetic scores was the performance IQ at the age of eight. In eight-year-old VPT/EPT children, performance IQ was more strongly affected than verbal IQ and was strongly associated with mathematical difficulties.