Family size, birth order, and academic achievement

Responses from 6,642 adolescents from forty‐six high schools in the United States were analyzed in a stepwise multiple regression to determine the independent as well as the combined effects of the variables (family size, birth order, and objective social class of father) on high‐school grade point average. Family size and birth order were not important. Contrary to other research findings, social class was of some importance. However, additional variables need to be introduced to explain grade point average.