The twins, Kayla and Kellie Bingham, were accused of "academic dishonesty" in May 2016 after test proctors reviewed the results of an exam on which their performance was deemed to be remarkably similar.The sisters' identical answers to 296 of 307 questions, including 54 wrong answers, raised alarm bells among university officials, who launched an investigation into the twins' performance.The Binghams successfully appealed the decision and filed a lawsuit against the university, arguing that for years they had behaved and performed similarly academically and in athletics."There is a wealth of psychological research that shows that identical twins do perform very similarly on tests of intelligence, information processing and speed of response, and I was not at all surprised they turned in very similar exams," Segal, who is a psychologist, told CBS MoneyWatch.People we had known, sat next to and studied with for two years would not speak to us," Kellie Bingham told CBS MoneyWatch."