There has been an enormous amount of research conducted about adoptees and their problems with identity formation. Many of the researchers agree on some of the causes of identity formation problems in adolescent adoptees, while other researchers conclude that there is no significant difference in identity formation in adoptees and birth children. This paper will discuss some of the research which has been conducted and will attempt to answer the following questions: Do adoptees have identity formation difficulties during adolescence? If so, what are some of the causes of these vicissitudes? Is there a significant difference between identity formation of adoptees and nonadoptees?