does one have influence more than the other and how?
Lack of emotional control is what makes you questions the analysis you made which was actually right, you will see yourself cutting your losses in a trade that if you had stayed more longer you would have won and make a fortune from.
Then as for the psychological aspect, if it's not right, you practically wouldn't be able to make the right decisions and the psychology of a trader mostly get bruise when he or she has gotten some back to back and back to back losses, anytime a trader is experiencing such, the best he can do for himself and regain his sanity is to stay off the market till he or she has cleared his head, but my overall verdict is that they are both influencial on a trader.
I tell you the truth, nothing beats emotions, and I think psychology will always stand on the shoulders of emotions