Summary statistics data from            Marsh, H. W. and Hocevar, D., 1985,        "Application of confirmatory factor analysis to the study            of self-concept: First- and higher order factor models            and their invariance across groups",            _Psychological Bulletin_, 97: 562-582.
Summary statistics based on 251 students from Sydney, Australia in Grade 5.
Data collected using the Self-Description Questionnaire and includes sixteen subscales designed to measure nonacademic traits: four intended to measure physical ability, four intended to measure physical appearance, four intended to measure relations with peers, and four intended to measure relations with parents.