If they knew ahead of time what the crow would do, it's a demonstration. If they didn't know how it would behave, it's an experiment.
I'd say it's pretty likely they observed that crows had some kind of understanding of water displacement, and came up with a bunch of tests to see how far they could take it.
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u/wertperch A lot of IT is just not being stupid. Dec 18 '19
The inability to connect cause and effect amazes me. Five-year-olds have that figured out. Heck, I bet there are cats who've got that down.