McDevitt Sean C, Carey William B
Devereux Center.
Children's Hospital.
Am J Orthopsychiatry. 1981 Apr;51(2):342-345. doi: 10.1111/j.1939-0025.1981.tb01379.x.
A new caretaker questionnaire for assessment of NYLS temperament characteristics in one-to-three-year-olds, part of a series of such instruments, is described. A study of stability of individual differences from early infancy to one-to-three years found significant correlations on all dimensions. Maternal general impressions, however, changed in several ways in the intervening time.