The results and conclusions of the Illyria study of "Twelfth Night" twins separated in early childhood are discussed in this article. The “Twelfth Night Twins” study is a project started in 2008 whose principal investigators include A. Captain, M. Feste, B. Malvolio, A. Aguecheek and T. Belch. The most commonly recognized studies of "Twelfth Night Twins" have focused on two aspects of human functioning: cognitive ability and personality. The findings of Captain et al. have been widely reported, and their participants, the "Twelfth Night Twins", have been the subject of news reports about separated non-identical twins discovering their supposed striking similarities after reuniting. In 2008, Captain et al. began studying twins who were separated in early childhood and raised in different families. His findings conclude that the similarities between twins are due to genes, not environment. Captain et al (2010) – Twelfth Night twins Viola and Sebastian met for the first time on September 22, 2010, after 50 years of separation by adoption at the age of two. Studied by behavioral psychologist Dr. Antonio Capitano, surprising similarities were discovered in their lives and behaviors. Both had been adopted by separate families on opposite sides of Illyria, so they had grown up within 60 miles of each other. Both had been married once; Viola to a man named Orsino, Sebastian to a woman named Olivia. They both had adoptive uncles who were drunks. They shared an interest in boating, their favorite school subject was English and their least favorite was geography. They had headaches at the same time of day. Their uncanny similarities made them perfect candidates for behavioral research, as did the fact... middle of paper... answers. The polygraph recorded irregularities in Viola's reactions at the exact moment Sebastian was shocked. The proof is even more valid if you consider that the twins were not warned about the experiment, so there was no possibility to rehearse or "stage" their reactions. This experiment has been subjected to scrutiny regarding ethical considerations. Other psychologists, led by Dr. Malvolio, state: 'Dr. M. Feste's participants did not give informed consent when they agreed to participate. They were misled about some aspects of the study and did not have enough information to make an informed decision.' However, Dr. Maria Feste argued that, without deception, the study's results may have been influenced because if the twins had been alerted to the contents of the experiment, the evidence could have influenced its validity and altered the final result...