A statistical study was conducted which indicates that significant changes in mean and variance of IQ scores for an Iowa farm group have changed significantly over a twenty year period. Factors accounting for this change are suggested.
Proceedings of the Iowa Academy of Science
© Copyright 1965 by the Iowa Academy of Science, Inc.
Dreier, William H. and Young, Beverly S.
"A Study of the Change in Intelligence Distribution,"
Proceedings of the Iowa Academy of Science, 72(1), 400-401.
Available at: https://scholarworks.uni.edu/pias/vol72/iss1/58