This study extended previous research on changes in children's self-beliefs by documenting domain-specific growth trajectories for 761 children across grades 1 through 12 in a longitudinal study of perceptions of self-competence and task values. Hierarchical Linear Modeling was used to (1) describe changes in beliefs across childhood and adolescence within the domains of mathematics, language arts, and sports; (2) examine the impact of changes in competence beliefs on changes in values over time in the same domains; and (3) describe gender differences in mean levels and trajectories of change in competence beliefs and values. The most striking finding across all domains was that self-perceptions of competence and subjective task values declined as children got older, although the extent and rate of decline varied across domains. For example, in language arts, competence beliefs declined rapidly during the elementary school years, but then leveled off or increased to some extent; whereas the decline in self-competence beliefs in sports accelerated during the high school years. Significant gender differences in beliefs were found in most domains; however, the gender differences in developmental trajectories appeared to be domain specific rather than global. Importantly, the gender differences between boys and girls did not systematically increase with age, as predicted by some socialization perspectives. Adding competence beliefs as an explanatory variable to the model for task values revealed that changes in competence beliefs accounted for much of the age-related decline in task values. In addition, competence beliefs accounted for most of the gender differences in task values for language arts and sports.

Gender segregation continues to exist in many activity and occupational domains. This article uses the expectancy effect perspective to analyze the role parents may play in influencing their children to engage in gender role stereotyped activities. It outlines the theoretical bases for such effects, and discusses how to distinguish between accuracy and perceptual bias in parents' gender role differentiated perceptions of their children's competencies and interests. Then it summarizes the results of a series of studies, which show that parents distort their perceptions of their own children in gender role stereotypic activities such as math and sports, that the child's gender affects parents' causal attributions for their children's performance in gender role stereotypic activities, and that these perceptual biases influence the children's own self‐perceptions and activity choices. Finally, the article presents a theoretical model of how these processes may occur.

The focus of this study is the relation between mothers' gender stereotypic beliefs, their perceptions of their children's abilities, and their children's self-perceptions in 3 activity domains. Approximately 1,500 mothers and their 11- to 12-year-old children responded to questions about the children's abilities in the math, sports, and social domains. It was predicted that mothers' beliefs about their children would be moderated by their gender stereotypic beliefs about the abilities of female and male people in general. As predicted, path analyses revealed that mothers' gender stereotypic beliefs interact with the sex of their child to influence their perceptions of the child's abilities. Mothers' perceptions, in turn, mediate the influence of past performance on children's self-perceptions in each domain.

Past research has indicated an association between parents' beliefs and adolescent children's selfperceptions of ability and has shown the importance of accounting for parents' gender-stereotyped beliefs when examining boys' and girls' self-perceptions of math-science ability. The current study extends these findings by examining the longitudinal relations between mothers' earlier gender stereotypes and perceptions and adolescents' later math-science achievement beliefs and career choices. As predicted, mothers' earlier perceptions of their adolescents' abilities were related to adolescents' math-science self-efficacy 2 years after high school, with adolescents' self-perceptions of math ability during 10th grade mediating the relation with mothers' perceptions. Moreover, mothers' earlier predictions of their children's abilities to succeed in math careers were significantly related to later career choices.

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