Standardization of the Denver Developmental Screening Test (DDST) on 288 babies raning in age from two to 54 weeks in Yucatan, Mexico, yielded such findings as that subtest scores increased with age, and that the DDST failed to identify a "questionable" 16 or 17 babies with borderline scores on the Bayley Motor Scale. (Author/MC)

This study was conducted to investigate the long-term validity of the Japanese version of the Denver Developmental Screening Test (JDDST). Participating in the initial assessment were 1230 children in Tokyo and 600 children in Iwate who were between 1 month and 6 years of age when assessed between 1975 and 1979. Participants in the 1983 and 1985…