[folkrav]

I was asking about the concept of “hive mind”. Is the concept accepted as a “thing”, has it ever been measured in any way, and if yes, what is it?

[AlecSchueler]

Yes, it's the idea that the colony exhibits behaviour with a level of intelligence impossible for any of the single bees. Things like choosing the location of the nest or managing the temperature of the nest, there's various decisions "made" by the colony as a kind of emergent property of the behaviour of the individual bees who themselves don't have the capacity to think at that level. The various aspects of colony behaviour have all been individually studied by quite a few people and groups, yes.

[s1artibartfast]

I think you are missing the point of the question, and it revolves around calling it a mind capable of decisions.