I am a psychology and creative writing major and usually when I tell people that their response is "Wow, how do those go together?" After nearly four years of hearing this response, I didn't think anything of it and just assumed that it didn't match up. Then a few weeks ago I told my doctor and she said "Wow, those go together perfectly." I didn't see it at first until I had to write a paper about things and was like "Wow, these do go hand in hand." You have to know a little bit about personal behaviors, thoughts, attitudes, and personality to create a fully realized characters. There are so many parts of a person that you couldn't get just on the page.
I don't presume to know anything major about psychology or creative writing. All I do know is that I'm interested in both fields and there's a connection between the two.
I will be posting these when I get the chance. I hope you enjoy them and I hope you'll add your own opinion about the subject too.
Life Span Development
Judging Personality in Daily Life/Writing