Motor Development in Yucatecan Infants

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Abstract
Infant motor development was studied in three socio-cultural groups inYucatan, Mexico, using the Denver Developmental Screening Test f9DDSTF0 AND THEBayley Infant Motor Scale. Eight infants f9four boys and four girlsf0 at each monthof age from two weeks to one year and two weeks were examined in each group, a total of 288infants f996 in each groupf0. There were no significant differences in motor developmentamong the groups or between boys and girls. There was an increase in abilities with age. Compared with the Bayley norms for the USA, fine motor co-ordination was advanced inthese children but there was a delay in walking. The DDST was unable to detect childrenmore than one standard deviation below the mean on the Bayley Infant Motor Scale.