Infant Vocalizations and Their Relationship to Mature Intelligence

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Science  21 Jul 1967:
Vol. 157, Issue 3786, pp. 331-333
DOI: 10.1126/science.157.3786.331


Correlations between infant development tests and later intelligence have been found previously to be very low. Through cluster analysis, six clusters of items were extracted from Bayley's California First Year Mental Scale. One item cluster composed principally of vocalizations did significantly correlate with girls' later intelligence, increasingly so with age, and more highly with verbal than performance scores.