Data from 877 3rd, 7th, and 11th graders substantiated the multidimensionality of academic self-concept, as based on the Shavelson model, but yielded no support for increasing differentiation across age. Data also determined minor deterioration of hierarchical structure for early and late adolescents but no progressive pattern of weakening across…

This study represents the first to empirically validate the structure of social self-concept (SC) as proposed by the Shavelson model. For each of three age groups--preadolescents (252 3rd graders), early adolescents (290 7th graders), and late adolescents (335 11th graders)--analyses of covariance structures were used to test: (1) that social SC…