Data collected using the Self-Description Questionnaire and includes         sixteen subscales designed to measure nonacademic status: 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.
Group 1 is grade 4, group 2 is grade 5.
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         134 students in grade 4 and         251 students in grade 5        from Sydney, Australia.