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
©1965 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