Can you list some examples of current research into functional fixedness?

Can you give more examples or describe the current research into functional fixedness?

I first learned of this concept from a fantasy novel in which a King tells his people that all weapons and all tools can be converted to become the other. (Like Swords into Plough-Shears and Plough-Shears into Swords)

I also found the psychology experiment in which a person needs to attach a pair of wire cutters to a piece of rope on the ceiling and swing it to the other side to connect the two pieces that are just out of reach of the person trying to connect them.