How are signs affected without swords?

How are signs affected without swords? - White and Green Labeled Box

I've found online that apparently your signs deal a lot more damage if you don't have any sword equipped or you have your sword sheathed. But does it also affect the power of your Quen shield for example? And what about other signs? Does having no swords for example simulate a double sign intensity maybe? Does anybody know this?

the-witcher-3

Pictures about "How are signs affected without swords?"

How are signs affected without swords? - Blackboard with YOUR LIFE MATTERS inscription on black background

How are signs affected without swords? - Woman in Blue Jacket Holding White and Black I Am Happy to Be Happy Print Paper

How are signs affected without swords? - Drug Store Drink Coca Cola Signage on Gray Wooden Wall

Okay, time to admit it: Not all swords need large guards to be good

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Karolina Grabowska, Brett Sayles, Markus Spiske, Pixabay