. . . "2006Z"^^ . . "2006-09-15Z"^^ . . . "David Thoreson Lykken"@en . . . "1928-06-18Z"^^ . . "David Thoreson Lykken (June 18, 1928 \u2013 September 15, 2006) was a behavioral geneticist and Professor Emeritus of Psychology and Psychiatry at the University of Minnesota. He is best known for his work on twin studies and lie detection."@en . "1928Z"^^ . "Lykken, David T."@en . . "American behavioral geneticist" . .