Background : Early assessment of the child's developmental skills especially socialemotional
and adaptive behavior skills is very important for early treatment and preventing
problems. TheBayley-III scales are a worldwide valid tool for assessment of the children`s
different developmental skills.This study aimedtoassess the social-emotional and adaptive
behavior scores of Bayley-III scales, for normal Egyptian infants and toddlers .
Method:Across-sectional comparative design was used .Setting :The study was performed
at the neonatal intensive care unitfollow-up clinic and the Staff Day Work nursery both
affiliated to Mansoura University Children Hospital .Subjects :a convenience sample of all
available young children ranged in age 3 months to 42 months and 16 days of both genders
)n=140 .(Tools:tool (I):structured interview questionnaire sheet developed with ؛
Part (1 :(characteristics of the participated infants/toddlers .Part (2 :(characteristics ofthe
participated children`s parents،tool (II :(The researcher has adopted and used
twointerview questionnaires of the Bayley-III scales of Infant and Toddler Development ،
Third Edition :(1) Social-emotional scale questionnaire and (2) Adaptive behavior scale
questionnaire.Results :This study demonstrated that the social-emotional scale of the
Bayley-IIIhadahighmean row score and mean composite score which exceeded the USA
scores .Conclusion :The results suggested that the social-emotional scale and the adaptive
Behavior scale of the Bayley-III can be feasible instruments for assessment of the Egyptian
children'sdevelopment.Recommendations:An adapted translated version of the
Social -emotional and Adaptive behavior Scalescanhelp in improving and contributing to
the research and clinical field.