I'm naturally left handed but as a child of the 70's was taught to do most things right handed. As for your two "tests" I can do them both. For the ring finger tapping I'm about equal strength for both hands.
It took me a long time to figure out why my mother always says I tie my shoes backwards. Trying to tie my shoes as a right handed person would is challenging.
It took me a long time to figure out why my mother always says I tie my shoes backwards. Trying to tie my shoes as a right handed person would is challenging.