What is "deidentification"

Deidentification is defined as the process in which one sibling defines their identity by intentionally attempting to be different from the other. Adolescents begin to go through deidentification for a number of reasons. It commonly occurs as a result from issues within the sibling relationship. Adolescents go through deidentification as a defense mechanism for eliminating sibling rivalry. When siblings closely resemble each other, it can make finding an identity difficult. This can lead to strong competitive behaviors and increased aggression between siblings. One survey concluded that 62% of high school seniors had physically struck their sibling in the past year. The Process of deidentification decreases the chance of sibling rivalry. Deidentification allows them to branch off to form their own, different identity and to become familiarized with their individual personality. According to research, they may also begin the process of deidentification to protect themselves from social comparison. Not all siblings will go through deidentification. It is more common in siblings who share common characteristics, such as age and sex.