Contents:
1. Design and sample for a nationwide longitudinal study of adolescent boys, by Llyod D. Johnston
2. The development of a summary measure of socio-economic status, by Jerald G. bachman
3. Intellectual aptitudes and abilities:
a) relationships to selected criteria
b) environmental factors and racial differences in test performance, by Martha T. Mednick
4. Preliminary investigation of status inconsistency effects, by Terrence N. Davidson
5. Achievement motivation, grades, and instrumentality, by Joel O. Raynor