Many people have flexible dispositions, however, and will generally find their social lot improve if they teach themselves to take the initiative in social interactions. I believe there are true unchangeable introverts, but not as many who think that they are.

just wondering about the parallels...

there was a time when people thought that left-handed people could be taught to use the "right" hand too...

not saying it can't be done, but... you can probably predict my thoughts.