The Relationship Between IQ and Indices of Infant Speech Sound Development

Abstract

48 infants were selected from a total of 95 babies for whom speech records and/or Kuhlman intelligence tests were available, and who ranged in age from one to 28 months. There is a small but reliable relationship between certain aspects of infant speech sound development and the abilities measured by the Kuhlman Test of Mental Development. There is some evidence that the strength of this relationship increases with an increase in age. The sizes of the correlation coeffs. obtained in the study do not permit useful prediction of one variate from another.