Hi Kaja,
I started to take the first survey but stopped as it's really cognitively taxing, and a bit boring... there are so many examples!
Also it is hard to do this on a 7 point scale. I've never thought about two word phrases and how metaphorical they are, and on what scale... so it's quite a request to make someone do that so many times!
Maybe it would be better to simplify the test so that you are only asking 5 or 6 examples to each person, and maybe on a 5 point scale? I dont think the resolution going any higher is meaningful - I wanted to put every example as a 6, 'metaphorical'.
I'm not sure if something can be more metaphorical than something else - is it not just binary?