Twins and orphans.

Mental and Scholastic Tests.

E. M. N., Cyril Burt · Journal Of The Royal Statistical Society · 1923 · 217 citations

Education, Educational Assessment, Educational Measurement +11

STUDIES IN TWIN RESEMBLANCE

Christian Lauterbach · Genetics · 1925 · 89 citations · Full text

Life Sciences, Genetics, Psychology +7

ON THE RELATIONSHIP OF INTELLIGENCE TO SIZE AND SHAPE OF HEAD, AND TO OTHER PHYSICAL AND MENTAL CHARACTERS

K. PEARSON · Biometrika · 1906 · 72 citations

Medicine, Anatomy, Psychology +11

GENERAL ABILITY, ITS EXISTENCE AND NATURE

Bernard Hart, C. Spearman · British Journal of Psychology 1904-1920 · 1912 · 71 citations · Full text

Social Sciences, Behavioral Sciences, Psychology +7

Measurement of Twins

Edward L. Thorndike · The Journal of Philosophy Psychology and Scientific Methods · 1905 · 53 citations