This study aimed to examine the effects of infants' disposition and fathers' parenting attitudes on
peer aggression and withdrawal which are peer maladjustment behaviors surveying with 2 year
old infants, and to investigate whether fathers' child-rearing attitudes play a mediating role in
relation to infants' temperament and their peer aggression and withdrawal. Data was collected
from questionnaires with 50 infants in classes for 2 years of age in 3 daycare centers located in
Gyeonggi-do and their parents and findings are as follows: First, for infants' disposition and peer
aggression, only infants' adaptation and peer aggression was negatively exerted a significant effect
out of their disposition characteristics, and other characteristics of disposition and aggression were
not exerted a significant effect. Second, out of fathers' parenting attitudes, only affectionate
parenting attitude had a significant effect on peer aggression and withdrawal. Third, for infants'
disposition, the higher their physiological regularity was, the more fathers had affectionate
attitudes in relation to their parenting attitudes. Fourth, as a result of examining whether fathers'
child-rearing attitudes play a mediating role in relation to infants' temperament and their peer
aggression and withdrawal, it was found that they play partly mediating roles in 3 cases: Out of
sub factors of infants' disposition, their physiological regularity and paternal parenting attitudes
play a mediating role in relation to infants' withdrawal, infants' adaptation and fathers'
affectionate attitudes in relation to infants' withdrawal, and infants' mood and fathers' affectionate
attitudes in relation to infants' withdrawal. The present study suggests that concerning
characteristics that infants display, their behaviors may change in positive fashion depending on
parents' child-rearing attitudes rather than a problem of inherited disposition.