Few studies have investigated associations of milestone development in early childhood with intelligence in adulthood in typically developing children. The current study is an extension of 2 previous studies on smaller samples and investigated associations of age at attainment of 32 developmental milestones attained between 0 and 3 years of age…

Used the demographic variables of age, race, sex, education, occupation, region of residence, urban versus rural residence, and handedness in the prediction of premorbid IQs for the 1981 revised Wechsler Adult Intelligence Scale (N=1,880). Results indicated that the regression equations aid in accurate estimation of premorbid IQ. (LLL)