At the heart of the literature on cognitive predictors of later schizophrenia (for reviews, see references 5, 6) are a number of longitudinal studies of population-based birth cohorts, including the Dunedin Multidisciplinary Health and Development Study (7). The cohort comprises 1,037 individuals born between 1972 and 1973 in Dunedin, New Zealand (91% of eligible births), who have undergone repeated assessments of health, cognition, and behavior, with the first follow-up at age 3 and the most recent at age 38. In this issue of the Journal, Meier et al. (8) describe new Dunedin cohort analyses, extending an earlier round of analyses described by Reichenberg et al. (9) in these pages in 2010. Both studies found that childhood IQ was lower, by approximately 0.5 standard deviations relative to healthy peers, in cohort members who were later diagnosed with schizophrenia. However, for both reports, the central aims were to unpack this overall finding in order to address lingering questions about schizophrenia-related cognitive development: 1) What course does cognitive development follow in people who will have this disorder—during childhood, and from premorbid to postonset time frames? 2) Is developmental course similar across domains of cognitive performance? 3) Is there a particular pattern of cognitive development that shows specificity for the development of schizophrenia?