Why do insecure people continually boast about their achievements, their money, their conquests ...? According to psychology, it is a way to symbolically complete your identity. That is, when the insecure feels that part of his identity is missing, he will compensate it symbolically. Fill the void.
This is what psychology researchers found in the early 1980s Robert A. Wicklund Y Peter M. Gollwitzer, from the University of Austin, who led a series of experiments on the theory of self-consciousness.
Theory of self-awareness
People who focus on analyzing their behavior are well motivated to change it, or to avoid contradictions. In a 1981 study, it was tried to find out if the security of someone in their identity affected how much they felt the need to influence others in that area.
In one experiment, participants were asked to name an activity or topic in which they had "special competence" (such as music, football or an academic subject), to write how many years of training they had in it and how recently they had done it . Next, participants were asked to write an essay about the activity, which they were told would be shown to several groups of students.
When asked how many students should read their essays, less experienced participants wanted most of the students to read it. People with less "complete" identities had the greatest desire to influence others.. Another experiment in the same study showed that those with more experience were also more willing to be self-critical, that is, they felt comfortable saying negative things about themselves.
Nowadays, social networks make it easy to know that your school rival got a new job better than yours, or that your brother-in-law is running a marathon and that your ex-girlfriend seems to be extremely happy in their new relationship. The theory says that sometimes, regular announcements about the amazing nature of an area of someone's life hide a deeper insecurity.