Age-related and developmental differences in the content and process o
f worry were examined in children 5 to 6, 8 to 9, and 11 to 12 years o
f age. These ages were chosen to approximate three levels of cognitive
development. A measure of self-concept development was also included.
Results suggest that worrisome thoughts occur in children's anxious e
xperiences across the age range studied. However, such thoughts were f
ound to be more prevalent among children age 8 and older. Furthermore,
children in the two older groups generated a significantly greater va
riety of worries than 5- to 6-year-olds. These older children were als
o significantly more able to elaborate the potentially negative conseq
uences of selected worrisome possibilities. These findings suggest tha
t the worry process may become increasingly complex in middle childhoo
d. Results also supported the view that the content of children's worr
ies is constrained by social-cognitive limitations reflected by their
age and level of self-concept development. Worries related to physical
well-being decreased significantly, while concerns about behavioral c
ompetence, social evaluation and psychological well-being became more
prevalent with increasing age and self-concept complexity. Implication
s for a definition of worry in childhood and its role in childhood anx
iety are discussed.