I read about this in Shonda Rhimes’ book, “Year of Yes: How to Dance it Out, Stand in the Sun and be Your Own Person“. I think it’s fascinating that we are not just limited to how others view us with our body language, but that it can mentally change us too!
Also, even if you don’t know who Shonda Rhimes is (what, do you live under a rock?), I highly recommend her book! It is surprising, but she spends an entire year saying yes instead of no. How often do we decline invitations? I know I do, especially as someone with social anxiety! I would do nearly anything to avoid going out in public!
I wonder how my life would change if I stopped saying no?