A comparison of heritability estimates of US Negro and white high school students
A comparison of twin and sibling studies for a developmental theory of schizophrenia
Application of the twin method in the analysis of behavior and motor conditioning
Blood pressure and personality differences in MZ twins
Crime in a Danish twin population
Genetic components in motivational aspects of character
Heritability of factors in creative thinking and esthetic judgment
Obsessive psychoneurosis in twins
Social disadaptation: data on MZ and DZ twins
The hereditary component in reaction times
Twenty-one psychiatric cases and their MZ cotwins. A thirty years' follow-up