Kinship correlations reported by Sir Cyril Burt.

All the kinship correlations (and their sample sizes) reported over a period o f 30 years by Sir Cyril Burt are presented in tabular form. The kinships include identical twins reared together and apart, fraternal twins, siblings, parent-child, grandparent-grandchiM, cousins, and others, more rare types o f relationships. Burt's statistical methods and the procedures for testing and obtaining "final assessments" o f mental ability are fully described, and the final assessments for Burt's 53 monozygotie twins reared apart are given in full. Misprints and inconsistencies in some o f the data are noted, and recommendations are made for the presentation and preservation o f kinship data secured by future researchers.