Key points are not available for this paper at this time.
Dale A. Blyth, Roberta G. Simmons, Diane Bush, The Transition into Early Adolescence: A Longitudinal Comparison of Youth in Two Educational Contexts, Sociology of Education, Vol. 51, No. 3 (Jul., 1978), pp. 149-162
Blyth et al. (Sat,) studied this question.