Richard E. Stafford

Sex Differences in Spatial Visualization as Evidence of Sex-Linked Inheritance

Richard E. Stafford, R. E. Stafford, 1961 .

Hereditary and Environmental Components of Quantitative Reasoning

Richard E. Stafford, R. E. Stafford, 1972 .

The Speededness Quotient: A New Descriptive Statistic for Tests.

Richard E. Stafford, R. E. Stafford, 1971 .