Different Strokes
Dr. Peter Neubauer had the same perspective. So when the researchers saw that David Kellman, Eddy Galland, and Bobby Shafran were being put up for adoption, it was an opportunity to place the three babies into very different environments and see what role nature was going to play in their development.

Source: Adoption Support
David was sent to a working-class family, Eddy grew up in a middle-class home, and Bobby spent his childhood in an upper-middle-class family environment.