Is dodo the dumbest bird?

I'm curious, is the dodo bird truly the dumbest bird out there? Have scientists actually studied their intelligence levels, or is this just a common misconception? And if they are not the dumbest, then what other bird species might hold that title? It's important to have accurate information when discussing the intelligence of various animal species, so I'm eager to learn more about the dodo's cognitive abilities and how they compare to other birds.