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Nancy Bayley (1899- ) was an American developmental psychologist who worked on the development and restandardization of the Bayley Scales of Infant Development. These infant scales became the accepted standard for behavioral and motoric assessment of infants and young children.

Nancy Bayley, an original member of the research staff of the Jones Child Study Center , and was the first administrator of the Institute.[1]


  1. Bayley, N. 1933. Mental growth during the first three years: A developmental study of 61 children by repeated tests. Genetic Psychology Monographs, 14(1); Bayley, N. 1935. A development of motor abilities during the first three years. Monographs of the Society for Research in Child Development, 1 (Whole No.1).

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