الفهرس 
Title : Effect of environmental factors on motor development in normal children
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Abstract
Motor development in early childhood undergoes great
maturation and refinements due to the huge contact and interaction with
the environment. Numerous environmental factors can affect motor
development in many ways that can facilitate, slow or even impair motor
skills’ development. Objective: To evaluate the effect of selected
environmental factors (various categories of socioeconomic status,
nutritional status, presence and number of siblings) on motor
development, and assess the relation between selected environmental
factorsand motor development in normal children. Methods: Two
hundreds and seventy six normal children (out of three hundreds and six)
from both sexes aged 4-7 years participated in this study. Motor
development was assessed by the short form of Bruininks-Oseretsky Test
2 of Motor Proficiency. Nutritional status was measured by World health
organization AnthroPlus software, while socioeconomic status was
determined by socioeconomic status scale. Presence and number of
siblings was detected through direct questioning of children’sparents.
Results: There was no effect of socioeconomic status, nutritional status
and number of siblings on motor development, while there was an inverse
effect of presence of siblings on motor development. There was nonsignificant
relation between socioeconomic status and motor development
(r = 0.106, p = 0.078). Also, there was non-significant relation between
nutritional status and motor development (r = -0.082, p = 0.175).
Presence of siblings was negatively related to motor development (r = -
0.130, p = 0.031). Number of siblings had non-significant relation to
motor development (r = -0.045, p = 0.453). Conclusion: There was
neither effect nor relation between socioeconomic status, nutritional
status and number of siblings, and motor development, while there was
an inverse effect and negative relation between presence of siblings and
motor development.