As a psych major, how do you analyze the characters so well? I mean what is your process?

Thank you for saying I analyze them well :). My process is I look at their canon behavior and then I try to understand how they became that way, using an exclusion method. For example: Will has a very vivid imagination. What makes someone develop that? Children who have loving parents, who encourage imagination and creativity is one option. Lonely children with no siblings who need to constantly escape their reality is another. Which one is the most plausible for Will, considering he doesn’t display any other traits of a person who grew up with loving parents? Yeah lol. That’s essentially how I do it in order to analyze them, specifically when I back track and theorize.