To examine reasons for inconsistent findings in the development of sex-cate
gory constancy, children's constancy judgments and their accompanying expla
nations were studied over a 3-year period. preschool, kindergarten, and Ist
-grade children (N = 195) completed a sex-category constancy measure that e
licited explanations and assessed constancy for the self and others across
changes in gender-typed clothing, activities, and traits. Improvements in s
ex-category constancy performance were linked to explanations based on oper
ational reasoning. Lower constancy scores were linked to explanations that
emphasized gender role norms and external appearances. A separate analysis
revealed that judgment-explanation relationships were stronger for question
s about gender role changes in the self as opposed to others and for change
s in gender-typed clothing as opposed to activities and traits. findings su
ggest that the salience and personal relevance of gender role changes have
important effects on children's sex-category constancy judgments and explan
ations.