Data on social competence, behavior, and self-esteem were gathered fro
m a large sample of girls with Turner syndrome to determine whether ps
ychological difficulties were associated with Turner syndrome. Subject
s included 97 girls with Turner syndrome, 7 to 14 years of age, and 93
girls without Turner syndrome recruited from public schools. The two
groups of girls were similar in age, verbal intelligence scores, and r
acial composition. The girls with Turner syndrome were found, based on
both parental and self-report, to be more immature than the girls in
the comparison group, with weaker social relationships, school perform
ance, and self-esteem. A decline in self-esteem was also documented fo
r the girls with Turner syndrome, but not the comparison group, as the
y moved into early adolescence. Although the findings support an incre
ased risk for subtle behavioral problems among girls with Turner syndr
ome, in most cases the problems endorsed were not severe enough to sug
gest clinical impairment.