Abstract
The self-expression online is a popular practice appreciated by teenage girls, but often questioned for its effects on the development of the individual. In a comprehensive approach, this research aims to understand how these practices of self-expression online fit into a horizontal socialization process and contribute to identity development. Semi-structured interviews were conducted with 47 teenage girls aged 11 to 15 years. A lexicometric analysis with a Hierarchical Descending Classification (Alceste software) shows that self-expression online fits well in the heart of the horizontal socialization and proves to be much more than a means of social integration. Self-expression online, first learned from peers, is a practice both personalizing and customizable. It allows the mobilization of self-reflexive abilities in an intersubjective work, and reflects a real desire of social recognition and support.