True introversion - not being overly shy, but needing to be alone to get energy, and thinking things through (usually a lot) before actually being willing to say anything. That's why what I think is much more than what I actually say.
16 Habits Of Highly Sensitive People Do you feel like you reflect on things more than everyone else? Do you find yourself worrying about how other people feel? Do you prefer quieter, less chaotic environments?
This is for students but most adults need this.instead of "I Can't" or "I don't know". I would change a few of these though and guide students in "creating" the list as a class (beginning of the year mini-lesson).