However, I can tell you that being an introvert or extrovert is generally considered to be a natural aspect of an individual's personality. It is believed to have genetic and biological components that influence how a person responds to and interacts with the world around them. While certain life experiences may shape aspects of a person's personality, being an introvert or extrovert is typically considered to be a stable trait that develops early in life and persists throughout adulthood. It's not usually attributed to a single specific event.