In a statistical analysis of Kuhlman test scores and the Chen Index of speech development on 19 children from 1 to 6 mos. of age, 22 from 7 to 12 mos., 32 from 13 to 18 mos., 18 from 19 to 24 mos., it was found that speech sound development for the first 2 years of life is independent of intelligent test scores. Chen''s differential method of scoring the elements of premeaningful infant speech may be considered another useful index in estimating the general development of infants.