Julvez J, Guxens M, Carsin AE, Forns J, Mendez M, Turner MC, Sunyer J. A cohort study on full breastfeeding and child neuropsychological development: the role of maternal social, psychological, and nutritional factors. Dev Med Child Neurol. 2014 Feb;56(2):148-56. doi: 10.1111/dmcn.12282
Williams VSL, Wakeford ME. The predictive validity of the National Teacher Examinations for performance in teacher education programs. Educ Psychol Meas. 1993;53(2):533-9. doi: 10.1177/0013164493053002023