For individuals under 16 years, the Wechsler Intelligence Scale for Children (WISC, 6–16 years) and the Wechsler Preschool and Primary Scale of Intelligence (WPPSI, 2½–7 years, 3 months) are used.
— шкалу интеллекта для дошкольников и младших школьников "Wechsler Preschool and Primary Scale of Intelligence" (WPPSI).